CN209522577U - A kind of system that nitrogen oxide containing gas absorption prepares nitric acid - Google Patents
A kind of system that nitrogen oxide containing gas absorption prepares nitric acid Download PDFInfo
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- CN209522577U CN209522577U CN201821368546.2U CN201821368546U CN209522577U CN 209522577 U CN209522577 U CN 209522577U CN 201821368546 U CN201821368546 U CN 201821368546U CN 209522577 U CN209522577 U CN 209522577U
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Abstract
The utility model relates to the systems that nitrogen oxide containing gas absorption prepares nitric acid, including flue gas conveying device, oxygen-containing gas dispatching conveying device, flue gas compressor, multistage relieving haperacidity unit and exhaust purifier；The output end of flue gas conveying device and oxygen-containing gas dispatching conveying device passes through pipeline respectively and the inlet end of flue gas compressor is connected to and in communication with, the exhaust end of flue gas compressor and the inlet end of multistage relieving haperacidity unit are connected to and in communication with, and the outlet side of multistage relieving haperacidity unit is connected with the gas inlet of exhaust purifier；For flue gas conveying device input terminal by the external nitrogen oxide containing gas gas source of pipeline, the input terminal that oxygen-containing gas dispenses conveying device passes through the external oxygen-containing gas gas source of pipeline.Advantage: flue gas compressor pressurization can directly improve nitrogen oxides in effluent concentration, gas volume is reduced, also, flue gas is easier to be absorbed the concentration that nitrogen oxides in effluent can directly be greatly lowered under high pressure, whole system high treating effect, energy-saving and environmental protection.
Description
Technical field
The utility model relates to flue gas acid preparing technology, in particular to what a kind of nitrogen oxide containing gas absorption prepared nitric acid is
System.
Background technique
Nitrogen oxides (NOx) just had been identified as in the 1960s be atmosphere one of major pollutants.As
The nitrogen oxides (NOx) of air pollutants often refers to NO and NO2.Its influence to environment is mainly shown as the damage of aggravation ozone layer
Consumption promotes greenhouse effects, forms photochemical fog and acid rain, damages to plant.Nitrogen oxides includes to the harm of human body
Eyes are stimulated, a variety of diseases such as cancer, respiratory disease, cardiovascular and cerebrovascular disease are caused.
General industry discharged nitrous oxides administer the redox denitration device used can not be suitable for processing discharge amount it is big,
The oxides of nitrogen gas that fluctuation of concentration range is wide, flue gas moisture content is high.And using soda liquor absorption technique, then tail gas is difficult row up to standard
It puts, the basic agent of consumption is more, and processing cost is high, while the waste water generated contains nitrite, is a kind of carcinogenic compound, causes
Secondary pollution.This patent is directed to a kind of efficient nitrogen oxide containing gas recycling treatment process, for without other gases
The not high gas of (removing constituent of air) and contained nitrous oxides concentration also has good treatment effect.Utilize this patent design
Technique and system can be widely used nitric acid as raw material in chemical industry, metallurgy industry, push related industry technology upgrading, simultaneously
Achieve the purpose that resource circulation utilization.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of system that nitrogen oxide containing gas absorption prepares nitric acid,
Effectively overcome the defect of the prior art.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of nitrogen oxide containing gas absorption prepares nitric acid
System, including flue gas conveying device, oxygen-containing gas dispatching conveying device, flue gas compressor, multistage relieving haperacidity unit and tail gas is net
Change device；
The output end of above-mentioned flue gas conveying device and oxygen-containing gas dispatching conveying device passes through pipeline and above-mentioned flue gas respectively
The inlet end of compressor is connected to and in communication with, and the exhaust end of above-mentioned flue gas compressor is connect with the inlet end of above-mentioned multistage relieving haperacidity unit
And be connected to, the outlet side of above-mentioned multistage relieving haperacidity unit is connected with the gas inlet of above-mentioned exhaust purifier；
For above-mentioned flue gas conveying device input terminal by the external nitrogen oxide containing gas gas source of pipeline, above-mentioned oxygen-containing gas dispatching is defeated
The input terminal of device is sent to pass through the external oxygen-containing gas gas source of pipeline.
The beneficial effects of the utility model are: whole system design is rationally, flue gas compressor pressurization can directly improve cigarette
Nitrous oxides concentration in gas reduces gas volume, improves gas concentration, shortens the period of processing, also, cigarette under high pressure
Gas is easier to be absorbed the concentration that nitrogen oxides in effluent can directly be greatly lowered, and whole system fume treatment effect is good,
Energy-saving and environmental protection.
Based on the above technical solution, the utility model can also do following improvement.
Further, above-mentioned multistage relieving haperacidity unit includes multiple relieving haperacidity groove tanks being arranged in a one-to-one correspondence and absorber；
Multiple above-mentioned relieving haperacidity groove tanks are set gradually by tandem, and the upper end of each above-mentioned relieving haperacidity groove tank, which is equipped with, is connected to it
The internal excessive port of inlet and first；
The leakage fluid dram of each above-mentioned absorber passes through pipeline and is connected to the inlet of corresponding above-mentioned relieving haperacidity groove tank；
Pass through the pipeline above-mentioned relieving haperacidity groove tank adjacent with rear positioned at the first excessive port of the above-mentioned relieving haperacidity groove tank in front
The air inlet of corresponding absorber is connected；
The lower end of each above-mentioned relieving haperacidity groove tank is equipped with acid cycle outlet, and the acid cycle of each above-mentioned relieving haperacidity groove tank goes out
Mouth is connected by pipeline with the inlet of corresponding above-mentioned absorber, and is equipped with liquid pump on the pipeline；
The air inlet of the corresponding above-mentioned absorber of above-mentioned relieving haperacidity groove tank of forefront constitute above-mentioned multistage relieving haperacidity unit into
Gas end；First excessive port of the above-mentioned relieving haperacidity groove tank of rearmost constitutes the outlet side of above-mentioned multistage relieving haperacidity unit.
Beneficial effect using above-mentioned further scheme is that multistage relieving haperacidity unit design is reasonable, is handled smoke multistage absorption
Effect is good.
It further, further include cooling system, above-mentioned cooling system includes condenser, cooling device and multiple and above-mentioned absorption
The output end of the one-to-one cooling line of device, above-mentioned flue gas conveying device and oxygen-containing gas dispatching conveying device passes through pipe respectively
Road is connected with the air inlet of above-mentioned condenser, and the gas outlet of above-mentioned condenser passes through the above-mentioned relieving haperacidity groove tank of pipeline and forefront
The air inlet of corresponding absorber is connected；Above-mentioned cooling line is separately positioned at corresponding above-mentioned absorber, above-mentioned cooling
Pipeline is connected with above-mentioned cooling device respectively, to corresponding above-mentioned absorber radiating and cooling.
Beneficial effect using above-mentioned further scheme is that cooling system can effectively control flue gas suction in whole system
The environment temperature in time receiving, it is ensured that the optimal absorption effect of flue gas.
Further, above-mentioned cooling device be water cooler, the coolant liquid loop head of above-mentioned water cooler with it is each above-mentioned
The liquid outlet of cooling line is connected, the inlet of the coolant liquid loop exit of above-mentioned water cooler and each above-mentioned cooling line
It is connected.
Beneficial effect using above-mentioned further scheme is to use water cooling easy to operate, and cooling effect is stablized, low in cost.
It further, further include acid cycle spray system, above-mentioned acid cycle spray system includes aqueous stream injectors and spray
Device is drenched, above-mentioned spray thrower is mounted on the top inside the above-mentioned relieving haperacidity groove tank of forefront, and the liquid outlet of above-mentioned aqueous stream injectors is logical
It crosses pipeline to be connected to and in communication with above-mentioned spray thrower, the inlet of above-mentioned aqueous stream injectors passes through the above-mentioned relieving haperacidity of pipeline and forefront
The lower end of groove tank connects and is connected with inside it, and connection is equipped with liquid pump on the pipeline；Except the above-mentioned relieving haperacidity slot of forefront
The upper end of relieving haperacidity groove tank other than tank is respectively equipped with its second internal excessive port of connection, and above-mentioned second excessive port passes through pipe respectively
Road is connected with the air inlet of above-mentioned aqueous stream injectors.
Beneficial effect using above-mentioned further scheme is that spray system enables to the flue gas not fully absorbed can be into
One step cyclic absorption improves smoke absorption rate.
Further, lead between the lower end of both the above-mentioned relieving haperacidity groove tank being located behind above-mentioned relieving haperacidity groove tanks adjacent with front
It crosses pipeline to be interconnected, and is equipped with the pump to the conveying acid solution of tank body forwards, each above-mentioned relieving haperacidity slot on the pipeline of connection
The bottom of tank is equipped with acid discharge mouth, and valve that is openable or closing it is equipped at acid discharge mouth.
Beneficial effect using above-mentioned further scheme is the design by piping connection between adjacent relieving haperacidity groove tank, can root
Acid solution is shifted from the front to the back according to actual conditions, and flexible operation improves the efficiency of whole relieving haperacidity, while also facilitating sour in relieving haperacidity groove tank
The discharge of liquid is collected.
It further, further include deaerator, above-mentioned deaerator connection is arranged in above-mentioned flue gas conveying device and nitrogen
On the pipeline being connected between oxide flue gas gas source.
Beneficial effect using above-mentioned further scheme is that deaerator can separate air, improves nitrogen in flue gas indirectly
The concentration of oxide components, it is ensured that flue gas is preferably handled in hypergravity equipment, is reduced processing difficulty and treating capacity, is subtracted
Few investment
It further, further include hypergravity machine, above-mentioned hypergravity machine connection is arranged in above-mentioned deaerator and above-mentioned flue gas
On the pipeline being connected between conveying device.
Beneficial effect using above-mentioned further scheme is that nitrogen oxidation in flue gas can be greatly lowered by hypergravity machine
The concentration of object mitigates the processing pressure of follow-up equipment, and deaerator combination hypergravity machine and flue gas compressor can be big
The efficiency and effect of the promotion fume treatment of amplitude.
It further, further include hypergravity machine, above-mentioned hypergravity machine connection is arranged in above-mentioned flue gas conveying device and nitrogen oxidation
On the pipeline of object flue gas gas source connection.
Beneficial effect using above-mentioned further scheme is that nitrogen oxidation in flue gas can be greatly lowered by hypergravity machine
The concentration of object mitigates the processing pressure of follow-up equipment.
Further, above-mentioned flue gas conveying device and oxygen-containing gas dispatching conveying device are anti-corrosion high pressure blower.
Beneficial effect using above-mentioned further scheme is that conveying is stablized, conducive to the distribution between flue gas and oxygen-containing gas
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the nitrogen oxide containing gas absorption of the utility model prepares the system of nitric acid；
Fig. 2 is the structural representation of one embodiment that the nitrogen oxide containing gas absorption of the utility model prepares the system of nitric acid
Figure；
Fig. 3 is that the structure for another embodiment that the nitrogen oxide containing gas absorption of the utility model prepares the system of nitric acid is shown
It is intended to；
Fig. 4 is that the structure for the further embodiment that the nitrogen oxide containing gas absorption of the utility model prepares the system of nitric acid is shown
It is intended to.
In attached drawing, parts list represented by the reference numerals are as follows:
1, flue gas conveying device, 2, oxygen-containing gas dispatching conveying device, 3, surge tank, 4, relieving haperacidity groove tank, 5, absorber, 6,
Exhaust purifier, 7, liquid pump, 8, condenser, 9, cooling device, 10, aqueous stream injectors, 11, spray thrower, 12, pump, 50, flue gas
Compressor, 60, deaerator, 100, hypergravity machine.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Embodiment: as shown in Figure 1, the system that the nitrogen oxide containing gas absorption of the present embodiment prepares nitric acid includes flue gas conveying
Device 1, oxygen-containing gas dispatching conveying device 2, flue gas compressor 50, multistage relieving haperacidity unit and exhaust purifier 6；
The output end of above-mentioned flue gas conveying device 1 and oxygen-containing gas dispatching conveying device 2 passes through pipeline and above-mentioned cigarette respectively
The inlet end of air compressor 50 is connected to and in communication with, the air inlet of the exhaust end of above-mentioned flue gas compressor 50 and above-mentioned multistage relieving haperacidity unit
End is connected to and in communication with, and the outlet side of above-mentioned multistage relieving haperacidity unit is connected with the gas inlet of above-mentioned exhaust purifier 6；
Above-mentioned 1 input terminal of flue gas conveying device passes through the external nitrogen oxide containing gas gas source of pipeline, above-mentioned oxygen-containing gas dispatching
The input terminal of conveying device 2 passes through the external oxygen-containing gas gas source of pipeline.
When fume treatment, flue gas first through in 1 input channel of flue gas conveying device, and with from oxygen-containing gas dispatching conveying dress
The air or oxygen for setting 2 completes distribution mixing in pipeline, and in next step, compressing along it through flue gas compressor 50 after distribution mentions
The pressure of high flue gas, the volume for reducing flue gas, the concentration of nitrogen oxides in effluent, shortens processing directly in raising unit volume
Period, and flue gas is easier to be absorbed relieving haperacidity under high pressure, to greatly improve the effect of fume treatment absorption, most
Afterwards, discharge amount of nitrogen oxides meets the tail gas of discharge standard i.e. after the purification of exhaust purifier 6 then after multistage relieving haperacidity processing
It can.
Preferably, above-mentioned multistage relieving haperacidity unit includes multiple relieving haperacidity groove tanks 4 being arranged in a one-to-one correspondence and absorber 5；
Multiple above-mentioned relieving haperacidity groove tanks 4 are set gradually by tandem, and the upper end of each above-mentioned relieving haperacidity groove tank 4 is equipped with connection
Its internal inlet and the first excessive port；
The leakage fluid dram of each above-mentioned absorber 5 passes through pipeline and is connected to the inlet of corresponding above-mentioned relieving haperacidity groove tank 4；
Pass through the pipeline above-mentioned relieving haperacidity groove tank adjacent with rear positioned at the first excessive port of the above-mentioned relieving haperacidity groove tank 4 in front
The air inlet of 4 corresponding absorbers 5 is connected；
The lower end of each above-mentioned relieving haperacidity groove tank 4 is equipped with acid cycle outlet, the acid cycle of each above-mentioned relieving haperacidity groove tank 4
Outlet is connected by pipeline with the inlet of corresponding above-mentioned absorber 5, and liquid pump 7 is equipped on the pipeline；
The air inlet of the corresponding above-mentioned absorber 5 of the above-mentioned relieving haperacidity groove tank 4 of forefront constitutes above-mentioned multistage relieving haperacidity unit
Inlet end；First excessive port of the above-mentioned relieving haperacidity groove tank 4 of rearmost constitutes the outlet side of above-mentioned multistage relieving haperacidity unit.
When relieving haperacidity, according to the oxygen-containing gas of the appropriate oxygen content of the concentration proportioning of nitrogen oxide containing gas (such as: air, oxygen,
Ozone etc.), the mixed gas imports in the absorber 5 of forefront after the compression of flue gas compressor 50 later, successively through absorber 5
(tandem) enters the acid manufacturing processes that (multistage) step by step is completed in each relieving haperacidity groove tank 4, and last tail gas is again through exhaust purifier 6
It completes final purification to arrange in outwardly air, entire acid manufacturing processes are by match oxygen-containing gas into one to nitrogen oxide containing gas
Step oxidation, and the technique for handling relieving haperacidity is absorbed along it by multistage, absorption efficiency is promoted, promotes the absorption of flue gas, greatly
Reduce the discharge amount of pernicious gas, effective Resource recovery, energy conservation and environmental protection.
It should be noted that the acid solution in each relieving haperacidity groove tank 4 is evacuated to corresponding suction through liquid pump 7 in acid manufacturing processes
It receives in device 5, is mixed to form gas-liquid mixture after carrying out initial absorption to the nitrogen oxide containing gas entered in absorber 5, enters back into
Further reaction produces acid solution in corresponding relieving haperacidity groove tank 4.
The purpose of above-mentioned distribution is to allow NO and oxygen or oxygen-containing gas that further oxidation reaction occurs, and production is more conducive to and water
Fused NO2。
Preferably, further including cooling system, above-mentioned cooling system includes condenser 8, cooling device 9 and multiple and above-mentioned suction
Receive the one-to-one cooling line of device 5, the output end difference of above-mentioned flue gas conveying device 1 and oxygen-containing gas dispatching conveying device 2
It is connected by pipeline with the air inlet of above-mentioned condenser 8, the gas outlet of above-mentioned condenser 8 is above-mentioned by pipeline and forefront
The air inlet of the corresponding absorber 5 of relieving haperacidity groove tank 4 is connected；Above-mentioned cooling line is separately positioned on corresponding above-mentioned absorber 5
Place, above-mentioned cooling line are connected with above-mentioned cooling device 9 respectively, to corresponding above-mentioned 5 radiating and cooling of absorber, cooling
The design nitrogen oxide containing gas and oxycompound of system, which carry out condensation by condenser 8 by proper proportion respectively, reduces its heat,
Absorber 5 is entered back into, the flue gas entered in it is dropped at each absorber 5 again by cooling device 9 and cooling line
Temperature processing absorbs environment to control for low temperature, negative pressure, therefore condenser 8 and cooling device 9 is arranged, and guarantees absorption process (nitrogen
Oxide flue gas) temperature be no more than 25 DEG C (the most preferably molten water relieving haperacidity temperature of nitrogen oxide containing gas), promote the suction of nitrogen oxide containing gas
It receives.
Preferably, above-mentioned cooling device 9 be water cooler, the coolant liquid loop head of above-mentioned water cooler with it is each above-mentioned
The liquid outlet of cooling line is connected, the inlet of the coolant liquid loop exit of above-mentioned water cooler and each above-mentioned cooling line
It is connected, cooling device 9, to heat exchange is carried out at each absorber 5, reduces the environment of smoke absorption using recirculated water cooling mode
Temperature, water-cooled effect are stablized, and use is also more convenient.
Preferably, further including acid cycle spray system, above-mentioned acid cycle spray system includes 10 He of aqueous stream injectors
Spray thrower 11, above-mentioned spray thrower 11 are mounted on the top inside the above-mentioned relieving haperacidity groove tank 4 of forefront, above-mentioned aqueous stream injectors 10
Liquid outlet is connected to and in communication with by pipeline with above-mentioned spray thrower 11, before the inlet of above-mentioned aqueous stream injectors 10 is by pipeline and most
The lower end of the above-mentioned relieving haperacidity groove tank 4 of side connects and is connected with inside it, and connection is equipped with liquid pump on the pipeline；Except forefront
Above-mentioned relieving haperacidity groove tank 4 other than the upper end of relieving haperacidity groove tank 4 be respectively equipped with its second internal excessive port of connection, above-mentioned second overflows
Port passes through pipeline respectively and is connected with the air inlet of above-mentioned aqueous stream injectors 10, is not substantially soluble in water in each relieving haperacidity groove tank 4
Nitrogen oxide containing gas through overflow shed come after be again introduced into aqueous stream injectors 10 respectively, with enter aqueous stream injectors 10 in acid
Liquid carries out fused absorption again, after be recycled into again through spray thrower 11 in the relieving haperacidity groove tank 4 of forefront and continue relieving haperacidity, thus
The purpose for realizing nitrogen oxide containing gas cyclic absorption, improves smoke absorption rate.
Preferably, the position in each above-mentioned relieving haperacidity groove tank 4 more than liquid level is filled with Pall ring filler, which is set
In respect of being conducive to enter the evenly dispersed of gas-liquid mixture or gas in relieving haperacidity groove tank 4, substantially ensures gas-liquid contact, improve gas-liquid point
Cloth promotes assimilation effect, and nitrogen oxide containing gas is made preferably to be dissolved in the relieving haperacidity for improving each relieving haperacidity groove tank 4 in water or acid solution
Effect.
Preferably, between the lower end of both the above-mentioned relieving haperacidity groove tank 4 being located behind above-mentioned relieving haperacidity groove tanks adjacent with front 4
It is interconnected by pipeline, and is equipped with the pump 12 to the conveying acid solution of tank body forwards, each above-mentioned system on the pipeline of connection
The bottom of acid tank tank 4 is equipped with acid discharge mouth, and valve that is openable or closing it is equipped at acid discharge mouth, which is convenient for relieving haperacidity
The discharge of acid solution in groove tank 4, in acid manufacturing processes, the concentration of acid solution from the front to the back pass by concentration in gradient in multiple relieving haperacidity groove tanks 4
Subtract, after acid strength is up to standard in the relieving haperacidity groove tank 4 of forefront, control forefront acid solution is collected by the discharge of acid discharge mouth, later
It will be pumped into the acid solution in the relieving haperacidity groove tank 4 at rear forwards adjacent relieving haperacidity groove tank 4 step by step, and the relieving haperacidity groove tank of rearmost
The water of supplement preparation acid solution, repeats aforesaid operations in 4, can also be according to selection preparation the case where each 4 concentration of relieving haperacidity groove tank not
With the acid solution of concentration, such as when being suitble to acquire (collection) positioned at concentration in the relieving haperacidity groove tank 4 of second, front, by its internal acid solution
Discharge, by acid solution in the relieving haperacidity groove tank 4 at its rear to being pumped into inside it, and successively by the relieving haperacidity groove tank 4 at rear to previous
Operation is pumped into adjacent relieving haperacidity groove tank 4.
In some embodiments, as shown in Fig. 2, further including deaerator 60, the above-mentioned connection of deaerator 60 setting
On the pipeline being connected between above-mentioned flue gas conveying device 1 and nitrogen oxide containing gas gas source, for the not high purified nitrogen oxygen of concentration
Compound flue gas separates separation air using deaerator 60, improves nitrogen oxides in effluent concentration indirectly, it is higher to obtain concentration
Nitrogen oxide containing gas, reduce treating capacity and processing difficulty, later, flue gas is directly promoting nitrogen in flue gas through flue gas compressor 50
The concentration of oxide, and flue gas pressures are promoted simultaneously, promote flue gas in subsequent acid manufacturing processes under high pressure and High Concentration Situation
Efficient absorption, thus the effect and efficiency for promoting nitrogen oxide containing gas processing by a relatively large margin.
In some embodiments, as shown in figure 3, further including hypergravity machine 100, the above-mentioned connection of hypergravity machine 100 setting exists
On the pipeline being connected between above-mentioned deaerator 60 and above-mentioned flue gas conveying device 1, heterogeneous fluid under the conditions of hypergravity is utilized
The unique flow behavior of system strengthens relative velocity between phase and phase and contacts with each other, improves gas-liquid contact interface, efficient absorption
Flue gas, so that efficient mass-and heat-transfer process and chemical reaction process are realized, after the hypergravity machine 100 processing, in flue gas
Nitrous oxides concentration is substantially reduced, and mitigates the processing pressure of follow-up equipment, greatly improves the effect of nitrogen oxide containing gas processing
The nitrogen oxide containing gas concentration of rate, later period is substantially reduced, and mitigates the processing pressure of follow-up equipment, then inhale by multistage relieving haperacidity unit
Amount of nitrogen oxides meets discharge standard in the receipts processing tail gas that ensures finally to be discharged, the practical upper deaerator 60 of the program
(such combination first passes through deaerator 60 for flue gas gas source concentration to the combined application of+hypergravity machine 100+ flue gas compressor 50
It is promoted, reduces the difficulty and treating capacity of subsequent fume treatment, then the flue gas after concentration is promoted is imported in hypergravity machine 100 and handled
The concentration that flue gas in subsequent flue gas acid preparing processing links can significantly be reduced, mitigates the processing pressure of follow-up equipment, later, warp
First two steps treated flue gas compressor 50 further promotes the absorption of flue gas by way of pressurization, promotes nitrogen oxides cigarette
The effect and efficiency of gas disposal).
Hypergravity machine 100 has the advantage that
1) equipment size is significantly reduced with weight, not only reduces cost, also reduces the impact to environment；
2) can rapidly and evenly microcosmic mixing, be greatly enhanced transmitting efficiency, improve absorption efficiency；
3) material is staying the time extremely short built in equipment, about 10-2~10-3s；
4) easily operated, it is easy to driving and parking, operating, maintenance and repair are convenient.
In further embodiments, as shown in figure 4, further including hypergravity machine 100, the above-mentioned connection of hypergravity machine 100 setting
On the pipeline that above-mentioned flue gas conveying device 1 is connected to nitrogen oxide containing gas gas source, the practical program is hypergravity machine 100+ cigarette
(such combination first passes through processing in hypergravity machine 100 can significantly reduce subsequent flue gas system to the combined application of air compressor 50
The concentration of flue gas in sour processing links, mitigates the processing pressure of follow-up equipment, and later, flue gas is directly mentioned through flue gas compressor 50
The concentration of nitrogen oxides in effluent is risen, and promotes flue gas pressures simultaneously, promotes subsequent relieving haperacidity under high pressure and High Concentration Situation
The efficient absorption of flue gas in journey, thus the effect and efficiency for promoting nitrogen oxide containing gas processing by a relatively large margin).
Above-mentioned flue gas conveying device 1 and oxygen-containing gas dispatching conveying device 2 are anti-corrosion high pressure blower, can be effectively facilitated
Nitrogen oxides is along the dispatching of itself and oxygen-containing gas.
Whole system is applicable not only to the absorption of nitrogen oxide containing gas, it can also be used to the recycling of sulfur-containing smoke gas, halogen gas
And resource utilization.
The higher the better for the concentration of whole system nitrogen oxide containing gas in fume treatment, general nitrogen oxide containing gas concentration
Within the scope of 20-80%, ingredient is with NO, NO2Based on (account for 90% of total nitrogen oxide or more), and NO/NO2Ratio is not higher than
4:1 (in principle, nitrogen oxide containing gas concentration cannot be below 20Vol%), in acid manufacturing processes, prepared nitric acid maximum concentration
It can achieve 45%, and treated that tail gas of the nitrogen oxides after three-level absorbs can achieve discharge standard, nitrogen oxides
Concentration of emission is lower than 1000ppm.
Above-mentioned exhaust purifier 6 passes through pipeline and rearmost relieving haperacidity slot using the common tail gas purification tower of industry, middle part
The excessive port of the first of tank 4 is connected, and its underpart is equipped with leakage fluid dram, and leakage fluid dram passes through the top of pipeline and rearmost relieving haperacidity groove tank 4
It is connected, the lower part of rearmost relieving haperacidity groove tank 4 also passes through pipeline and is connected to the top of tail gas purification tower, and the pipeline is equipped with pump
Body, after tail gas enters tail gas purification tower, the pump housing collect the acid solution in the relieving haperacidity groove tank 4 of rearmost in relieving haperacidity groove tank 4 on to
Lower formation spray liquid, tail gas are again dissolved in spray liquid in uphill process, are flowed back eventually by the leakage fluid dram of tail gas purification tower
To the relieving haperacidity groove tank 4 of rearmost, complete to handle the reclaiming clean of oxides of nitrogen gas in tail gas.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of system that nitrogen oxide containing gas absorption prepares nitric acid, it is characterised in that: including flue gas conveying device (1), oxygen-containing
Gas delivery conveying device (2), flue gas compressor (50), multistage relieving haperacidity unit and exhaust purifier (6)；
The output end of the flue gas conveying device (1) and oxygen-containing gas dispatching conveying device (2) passes through pipeline and the cigarette respectively
The inlet end of air compressor (50) is connected to and in communication with, the exhaust end of the flue gas compressor (50) and the multistage relieving haperacidity unit
Inlet end is connected to and in communication with, and the outlet side of the multistage relieving haperacidity unit is connected with the gas inlet of the exhaust purifier (6)；
For flue gas conveying device (1) input terminal by the external nitrogen oxide containing gas gas source of pipeline, the oxygen-containing gas dispatching is defeated
The input terminal of device (2) is sent to pass through the external oxygen-containing gas gas source of pipeline.
2. the system that a kind of nitrogen oxide containing gas absorption according to claim 1 prepares nitric acid, it is characterised in that: described more
Grade relieving haperacidity unit includes multiple relieving haperacidity groove tanks (4) being arranged in a one-to-one correspondence and absorber (5)；
Multiple relieving haperacidity groove tanks (4) are set gradually by tandem, and the upper end of each relieving haperacidity groove tank (4) is equipped with connection
Its internal inlet and the first excessive port；
The leakage fluid dram of each absorber (5) passes through pipeline and is connected to the inlet of the corresponding relieving haperacidity groove tank (4)；
Pass through the pipeline relieving haperacidity groove tank adjacent with rear positioned at the first excessive port of the relieving haperacidity groove tank (4) in front
(4) air inlet of corresponding absorber (5) is connected；
The lower end of each relieving haperacidity groove tank (4) is equipped with acid cycle outlet, the acid cycle of each relieving haperacidity groove tank (4)
Outlet is connected by pipeline with the inlet of the corresponding absorber (5), and is equipped with liquid pump on the pipeline
(7)；
The air inlet of the corresponding absorber (5) of the relieving haperacidity groove tank (4) of forefront constitutes the multistage relieving haperacidity unit
Inlet end；First excessive port of the relieving haperacidity groove tank (4) of rearmost constitutes the outlet side of the multistage relieving haperacidity unit.
3. the system that a kind of nitrogen oxide containing gas absorption according to claim 2 prepares nitric acid, it is characterised in that: further include
Cooling system, the cooling system include condenser (8), cooling device (9) and multiple one-to-one with the absorber (5)
The output end of cooling line, the flue gas conveying device (1) and oxygen-containing gas dispatching conveying device (2) passes through pipeline and institute respectively
The air inlet for stating condenser (8) is connected, and the gas outlet of the condenser (8) passes through the relieving haperacidity groove tank of pipeline and forefront
(4) air inlet of corresponding absorber (5) is connected；The cooling line is separately positioned at the corresponding absorber (5),
The cooling line is connected with the cooling device (9) respectively, to corresponding absorber (5) radiating and cooling.
4. the system that a kind of nitrogen oxide containing gas absorption according to claim 3 prepares nitric acid, it is characterised in that: described cold
But device (9) is water cooler, the liquid outlet phase of the coolant liquid loop head of the water cooler and each cooling line
Connection, the coolant liquid loop exit of the water cooler are connected with the inlet of each cooling line.
5. according to a kind of described in any item systems that nitrogen oxide containing gas absorption prepares nitric acid of claim 2 to 4, feature exists
In: it further include acid cycle spray system, the acid cycle spray system includes aqueous stream injectors (10) and spray thrower (11),
The spray thrower (11) is mounted on the top of the relieving haperacidity groove tank (4) inside of forefront, and the aqueous stream injectors (10) go out
Liquid mouth is connected to and in communication with by pipeline with the spray thrower (11), and the inlet of the aqueous stream injectors (10) is by pipeline and most
The lower end of the relieving haperacidity groove tank (4) in front connects and is connected with inside it, and connection is equipped with liquid pump on the pipeline；Except most
The upper end of relieving haperacidity groove tank (4) other than the relieving haperacidity groove tank (4) in front is respectively equipped with its second internal excessive port of connection, institute
It states the second excessive port and passes through pipeline respectively and be connected with the air inlet of the aqueous stream injectors (10).
6. according to a kind of described in any item systems that nitrogen oxide containing gas absorption prepares nitric acid of claim 2 to 4, feature exists
In: pass through pipeline between the lower end of both the relieving haperacidity groove tank (4) being located behind described relieving haperacidity groove tanks (4) adjacent with front
It is interconnected, and is equipped with the pump (12) to the conveying acid solution of tank body forwards, each relieving haperacidity groove tank on the pipeline of connection
(4) bottom is equipped with acid discharge mouth, and valve that is openable or closing it is equipped at acid discharge mouth.
7. the system that a kind of nitrogen oxide containing gas absorption according to any one of claims 1 to 4 prepares nitric acid, feature exist
In: it further include deaerator (60), deaerator (60) connection is arranged in the flue gas conveying device (1) and nitrogen oxygen
On the pipeline being connected between compound flue gas gas source.
8. the system that a kind of nitrogen oxide containing gas absorption according to claim 7 prepares nitric acid, it is characterised in that: further include
Hypergravity machine (100), hypergravity machine (100) connection are arranged in the deaerator (60) and the flue gas conveying device
(1) on the pipeline being connected between.
9. the system that a kind of nitrogen oxide containing gas absorption according to any one of claims 1 to 4 prepares nitric acid, feature exist
In: it further include hypergravity machine (100), hypergravity machine (100) connection is arranged in the flue gas conveying device (1) and nitrogen oxidation
On the pipeline of object flue gas gas source connection.
10. the system that a kind of nitrogen oxide containing gas absorption according to any one of claims 1 to 4 prepares nitric acid, feature
Be: the flue gas conveying device (1) and oxygen-containing gas dispatching conveying device (2) be anti-corrosion high pressure blower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368546.2U CN209522577U (en) | 2018-08-24 | 2018-08-24 | A kind of system that nitrogen oxide containing gas absorption prepares nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821368546.2U CN209522577U (en) | 2018-08-24 | 2018-08-24 | A kind of system that nitrogen oxide containing gas absorption prepares nitric acid |
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| Publication Number | Publication Date |
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| CN209522577U true CN209522577U (en) | 2019-10-22 |
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|---|---|---|---|
| CN201821368546.2U Active CN209522577U (en) | 2018-08-24 | 2018-08-24 | A kind of system that nitrogen oxide containing gas absorption prepares nitric acid |
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| Country | Link |
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| CN (1) | CN209522577U (en) |
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2018
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