CN209287047U - Equipment for denitrifying flue gas - Google Patents
Equipment for denitrifying flue gas Download PDFInfo
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- CN209287047U CN209287047U CN201920666156.1U CN201920666156U CN209287047U CN 209287047 U CN209287047 U CN 209287047U CN 201920666156 U CN201920666156 U CN 201920666156U CN 209287047 U CN209287047 U CN 209287047U
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Abstract
The utility model relates to gas denitrifying technology fields, in particular to a kind of equipment for denitrifying flue gas.A kind of equipment for denitrifying flue gas is used for the horizontal cigarette furnace of MTO, ammonia feed mechanism, air feed mechanism, ammonia sky mixed organization, jet mechanism and denitration reaction mechanism；The ammonia feed mechanism and the air feed mechanism are connected to the ammonia sky mixed organization, the ammonia sky mixed organization and the jet mechanism connection, the jet mechanism and the denitration reaction mechanism are each provided in the horizontal cigarette furnace of the MTO, and it is set gradually along the direction of the horizontal cigarette kiln gas circulation of the MTO, the air feed mechanism includes air heater, and the air heater is located in the horizontal cigarette furnace of the MTO.Higher cost when solving denitration in the horizontal combustion gas furnace of MTO in the prior art, meanwhile, safety lower technical problem lower using liquefied ammonia efficiency.
Description
Technical field
The utility model relates to gas denitrifying technology fields, in particular to a kind of equipment for denitrifying flue gas.
Background technique
With country and local, domestic petroleum petrochemical industry row increasingly stringent for the pollutant emission norm controlling of industrial smoke
The processing problem of the flue gas pollutant of industry, metal smelt industry, coal chemical industry etc. is more and more prominent, the production such as chemical plant, smeltery
The high-temperature flue gas containing pollutants such as nitrogen oxides can be generated in the process.
MTO is the abbreviation of methanol-to-olefins device, can generate the flue gas containing nitrogen oxides and dust in process of production,
Environmental requirement harsh at present is not met.There has been a large amount of flue gas removing nitrogen oxides technical method in the country at present, and answers
Ratio is wide, but the denitration facility of various methods more or less all shows that the applications such as huge investment, land occupation, maintenance are upper
Limiting factor.
Common denitration technology has Dry denitration, wet oxidation to absorb denitration, and Dry denitration has SNCR (selective non-catalytic
Reduction), SCR (selective catalytic reduction), absorption method.In Dry denitration, SNCR denitration low efficiency and more demanding reaction
Warm area (850-1050 DEG C) is not suitable for the fume treatment of MTO horizontal type waste heat boiler, additionally there are the high problem of the escaping of ammonia rate,
Especially lower denitration efficiency is not suitable for the policy requirements of the ultra-clean discharge of current flue gas pollutant；Absorption method mostly uses activity
Charcoal, molecular sieve etc., denitration efficiency is less than 20%；It is molten by solution after wet oxidation absorption process uses ozone etc. oxidizing
Xie Zaiyong lye neutralizes, and the power consumption for not only preparing ozone needs is higher, and the high total nitrogen content of discharging any waste liquor can be brought after denitration
Problem.
Currently, the fume treatment of the horizontal combustion gas furnace of MTO, mainly use SCR, 300-400 DEG C of SCR denitration reaction temperature it
Between, denitration efficiency is up to 98% or more, and still, the horizontal combustion gas furnace of MTO is there is also higher cost when SCR denitration in the prior art,
And it is lower using the direct reaction efficiency of liquefied ammonia, safety is lower, the larger problem of space occupied.
Utility model content
The purpose of this utility model is to provide a kind of equipment for denitrifying flue gas, to solve the horizontal flue gas of MTO in the prior art
Higher cost when denitration in furnace, meanwhile, safety lower technical problem lower using liquefied ammonia efficiency.
The embodiments of the present invention are achieved in that
A kind of equipment for denitrifying flue gas is used for the horizontal cigarette furnace of MTO, ammonia feed mechanism, air feed mechanism, ammonia sky mixing machine
Structure, jet mechanism and denitration reaction mechanism；
The ammonia feed mechanism and the air feed mechanism are connected to the ammonia sky mixed organization, and the ammonia sky is mixed
Mechanism and the jet mechanism connection are closed, the jet mechanism and the denitration reaction mechanism are each provided at the horizontal cigarette furnace of the MTO
In, and set gradually along the direction of the horizontal cigarette kiln gas circulation of the MTO；
The air feed mechanism includes air heater, and the air heater is located in the horizontal cigarette furnace of the MTO.
Further, the air feed mechanism further includes blower；
The blower is connected to one end of the air heater, the other end of the air heater with it is described with it is described
The connection of ammonia sky mixed organization.
Further, the air heater is coil pipe.
Further, the ammonia feed mechanism includes ammonium hydroxide holding vessel, ammonia water evaporator and aqua ammonia pump；
The ammonium hydroxide holding vessel is connected to by the aqua ammonia pump with the water inlet of the ammonia water evaporator, the ammonia water evaporator
The first gas outlet be connected to the ammonia sky mixed organization.
Further, the jet mechanism includes ammonia-spraying grid and flow straightening grid；
The ammonia-spraying grid and the flow straightening grid direction that flue gas is discharged along the horizontal cigarette furnace of the MTO are successively spaced setting,
The ammonia-spraying grid is connected to the ammonia sky mixed organization.
Further, the equipment for denitrifying flue gas further includes the protection mechanism for protecting the ammonia water evaporator；
The protection mechanism includes safety valve, ammonia thinning tank and waste water pump, and described safety valve one end and the ammonium hydroxide steam
The second gas outlet connection of device is sent out, the other end of the safety valve is connected to the ammonia thinning tank, the ammonia thinning tank
Side is equipped with the waste water pump, and the waste liquid after the waste water pump is used to dilute is discharged.
Further, the denitration reaction mechanism includes at least one layer of catalyst and at least one steam sootblower；
The catalyst is located at one end close to the jet mechanism, the steam sootblower be located at the jet mechanism and
Between the catalyst.
Further, the jet mechanism further includes water sealed tank；
The water sealed tank is connected to the ammonium hydroxide holding vessel, for improving the leakproofness of ammonium hydroxide holding vessel.
Further, the equipment for denitrifying flue gas further includes for controlling the ammonium hydroxide for entering ammonia vol in ammonia sky mixed organization
Flow control mechanism.
Further, the ammonia flow control mechanism includes: flow control valve, the first detection instrument, the second detector
Table and controller；
The first detection instrument is located between the ammonia-spraying grid and flow straightening grid, and the second detection instrument is located at institute
The one end of denitration reaction mechanism far from the flow straightening grid is stated, the flow control valve is located at the ammonia feed mechanism and ammonia is empty
Between mixed organization, the flow control valve, the first detection instrument, the second detection instrument and controller are electric with the controller
Connection, the first detection signal and second that the controller is issued according to the first detection instrument and the second detection instrument
Detection signal obtains the amount of used ammonia, and adjusts the regulating valve according to the amount of used ammonia.
A kind of equipment for denitrifying flue gas provided by the utility model, is used for the horizontal cigarette furnace of MTO, and ammonia feed mechanism, air supply
To mechanism, ammonia sky mixed organization, jet mechanism and denitration reaction mechanism；The ammonia feed mechanism and the air feed mechanism
It is connected to the ammonia sky mixed organization, the ammonia sky mixed organization and the jet mechanism connection, the jet mechanism and institute
It states denitration reaction mechanism to be each provided in the horizontal cigarette furnace of the MTO, and is successively set along the direction of the horizontal cigarette kiln gas circulation of the MTO
It sets, the air feed mechanism includes air heater, and the air heater is located in the horizontal cigarette furnace of the MTO.Using upper
Scheme is stated, since ammonia sky mixed organization is connected to air feed mechanism and ammonia feed mechanism, ammonia sky mixed organization and jet plane
The mixture of structure connection, such ammonia and air is used as reducing agent to enter in the horizontal cigarette furnace of MTO, and safety can be improved in this way
Property and reaction efficiency, and the air heater in air feed mechanism is located in the horizontal cigarette furnace of MTO, so as to utilize MTO
Heat in horizontal cigarette furnace heats air, and can save space, energy saving, reduces cost, existing to solve
Higher cost when denitration in the horizontal combustion gas furnace of MTO in technology, meanwhile, lower using liquefied ammonia efficiency, the lower technology of safety is asked
Topic.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of lock equipment for denitrifying flue gas provided by the embodiment of the utility model；
Fig. 2 is the flow diagram of lock equipment for denitrifying flue gas provided by the embodiment of the utility model.
In figure: 100- ammonia feed mechanism；200- air feed mechanism；300- ammonia sky mixed organization；400- jet mechanism；
500- denitration reaction mechanism；600- protection mechanism；700- ammonia flow control mechanism；110- ammonium hydroxide holding vessel；120- ammonium hydroxide steams
Send out device；130- aqua ammonia pump；140- water sealed tank；210- blower；220- air heater；410- ammonia-spraying grid；420- flow straightening grid；
510- catalyst；520- steam sootblower；610- safety valve；620- ammonia thinning tank；630- waste water pump；710- flow is adjusted
Valve；720- first detects instrument；730- second detects instrument.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under
The feature in embodiment and embodiment stated can be combined with each other.
As illustrated in fig. 1 and 2, and Fig. 2 is that flow diagram air heater 220 is not shown in the horizontal cigarette furnace of MTO, this reality
With a kind of equipment for denitrifying flue gas of novel offer, be used for the horizontal cigarette furnace of MTO, ammonia feed mechanism 100, air feed mechanism 200,
Ammonia sky mixed organization 300, jet mechanism 400 and denitration reaction mechanism 500；
The ammonia feed mechanism 100 and the air feed mechanism 200 are connected to the ammonia sky mixed organization 300,
The ammonia sky mixed organization 300 is connected to the jet mechanism 400, the jet mechanism 400 and the denitration reaction mechanism 500
It is each provided in the horizontal cigarette furnace of the MTO, and is set gradually along the direction of the horizontal cigarette kiln gas circulation of the MTO；
The air feed mechanism includes air heater, and the air heater is located in the horizontal cigarette furnace of the MTO.
Wherein, denitration reaction mechanism 500 is located at 300-400 DEG C of region in the horizontal cigarette furnace of MTO, the horizontal cigarette kiln gas of MTO
Horizontal direction flows to low-temperature space from high-temperature region.
In addition, the method for denitration that the utility model uses is the SCR technology i.e. SCR skill in Dry denitration
The problem of art, high nitrogenous discharging any waste liquor is not present in Dry denitration；Compared to other Dry denitration technologies, (such as selective non-catalytic is also
Former technology, that is, SNCR technology, for another example active carbon adsorption), due to having used suitable catalyst, denitration efficiency be up to 98% with
On.
In the present embodiment, since ammonia sky mixed organization 300 is connected to air feed mechanism 200 and ammonia feed mechanism 100,
Ammonia sky mixed organization 300 is connect with jet mechanism 400, and the mixture of such ammonia and air is used as reducing agent to enter MTO
In horizontal cigarette furnace, safety can be improved, and the air heater 220 in air feed mechanism 200 is located at the horizontal cigarette furnace of MTO
In, so as to heat using the heat in the horizontal cigarette furnace of MTO to air, with energy saving, cost is reduced, it is existing to solve
There is in technology in the horizontal combustion gas furnace of MTO higher cost when denitration, meanwhile, safety lower technology lower using liquefied ammonia efficiency
Problem.
On the basis of the above embodiments, further, the air feed mechanism 200 includes blower 210；
The blower 210 is connected to one end of the air heater 220, the other end of the air heater 220 with
It is described to be connected to the ammonia sky mixed organization 300.
Further, the air heater 220 is coil pipe.
In the present embodiment, air heater 220 is located in the horizontal cigarette furnace of MTO, passes through the heat in the horizontal cigarette furnace of MTO
To heat to by the air in air heater 220, so as to reduce cost, and the air after heating enters ammonia
After in empty mixed organization 300,5v% concentration or less is diluted to by the ammonia in ammonia sky mixed organization 300 is sufficiently mixed.
On the basis of the above embodiments, further, the ammonia feed mechanism 100 includes ammonium hydroxide holding vessel 110, ammonia
Water evaporimeter 120 and aqua ammonia pump 130；
The ammonium hydroxide holding vessel 110 is connected to by the aqua ammonia pump 130 with the water inlet of the ammonia water evaporator 120, described
First gas outlet of ammonia water evaporator 120 is connected to the ammonia sky mixed organization 300.
Further, the jet mechanism 400 further includes water sealed tank 140；
The water sealed tank 140 is connected to the ammonium hydroxide holding vessel 110, for improving the leakproofness of ammonium hydroxide holding vessel 110.
In the present embodiment, ammonium hydroxide is delivered to tank used for storing ammonia by aqua ammonia pump 130, and ammonia water evaporator 120 uses electric heating will
Ammonium hydroxide is evaporated to ammonia steam mixture, and is adjustable temperature using electric heating, guarantee ammonia it is stable be transported to ammonia sky
In mixed organization 300, it is equipped with water sealed tank 140 on ammonium hydroxide holding vessel 110, can avoid in ammonium hydroxide surge tank due to pressure and temperature
When variation, do not escape out ammonia.
On the basis of the above embodiments, further, the jet mechanism 400 includes ammonia-spraying grid 410 and honeycomb screen
Grid 420；
The ammonia-spraying grid 410 and the direction that flue gas is discharged along the horizontal cigarette furnace of the MTO of flow straightening grid 420 are successively spaced
Setting, the ammonia-spraying grid 410 are connected to the ammonia sky mixed organization 300.
In the present embodiment, ammonia-spraying grid 410 and flow straightening grid 420 are determined by flow field simulation, so that in the horizontal cigarette furnace of MTO
Flue gas be uniformly mixed with the ammonia that ammonia-spraying grid 410 sprays.
On the basis of the above embodiments, further, the equipment for denitrifying flue gas further includes for protecting the ammonium hydroxide
The protection mechanism 600 of evaporator 120；
The protection mechanism 600 includes safety valve 610, ammonia thinning tank 620 and waste water pump 630, the safety valve 610 1
End is connected to the second gas outlet of the ammonia water evaporator 120, the other end of the safety valve 610 and the ammonia thinning tank
620 connections, the side of the ammonia thinning tank 620 are equipped with the waste water pump 630, and the waste water pump 630 will be for after diluting
Waste liquid discharge.
In the present embodiment, when the pressure in ammonia water evaporator 120 is more than pre-value, safety valve 610 is opened, and evaporates ammonium hydroxide
Ammonia in device 120 enters in ammonia thinning tank 620, and ammonia is diluted to waste liquid by ammonia thinning tank 620, touches row by waste water
Out, to ensure the safety of single unit system.
On the basis of the above embodiments, further, the denitration reaction mechanism 500 includes at least one layer of catalyst
510 and at least one steam sootblower 520；
The catalyst 510 is located at close to one end of the jet mechanism 400, and the steam sootblower 520 is located at described
Between jet mechanism 400 and the catalyst 510.
Wherein, the quantity of catalyst 510 and the quantity of steam sootblower 520 correspond；And catalyst 510 uses ripple
Board-like catalyst 510, since the catalyst 510 is polymorphic pore structure, so as to the effect of ensuring equipment stable operation and denitration
Rate can also meet the denitration requirement under the exhaust gas bias current operating condition of horizontal flow direction.
In the present embodiment, when catalyst 510 and steam sootblower 520 are multiple, steam pipe is avoided when in use
The condensed water in road touches catalyst 510, it is necessary to empty to condensed water；When purging, when the purging of general each layer soot blower
Between be staggered, i.e., every time only purging one layer or one layer in a part of catalyst 510.
On the basis of the above embodiments, further, the equipment for denitrifying flue gas further includes for controlling the mixing of ammonia sky
Enter the ammonium hydroxide flow control mechanism of ammonia vol in mechanism 300.
Further, the ammonia flow control mechanism 700 includes: that flow control valve 710, first detects instrument 720, the
Two detection instrument 730 and controller；
The first detection instrument 720 is located between the ammonia-spraying grid 410 and flow straightening grid 420, second detection
Instrument 730 is located at the one end of the denitration reaction mechanism 500 far from the flow straightening grid 420, and the flow control valve 710 is located at
Between the ammonia feed mechanism 100 and ammonia sky mixed organization 300, the flow control valve 710, first detects instrument 720, the
Two detection instrument 730 and controller are electrically connected with the controller, and the controller is according to the first detection 720 He of instrument
First detection signal and the second detection signal that the second detection instrument 730 issues obtain the amount of used ammonia, and root
The regulating valve is adjusted according to the amount of used ammonia.
In the present embodiment, the first detection instrument 720 and the second detection instrument 730 can be respectively without denitration mechanism and warps
The amount of ammonia when crossing denitration mechanism, so that controller obtains required ammonia usage, controller controls ammonia adjustable valve
To adjust the amount for entering the ammonia in ammonia sky mixed organization 300.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of equipment for denitrifying flue gas, be used for the horizontal cigarette furnace of MTO, which is characterized in that ammonia feed mechanism, air feed mechanism,
Ammonia sky mixed organization, jet mechanism and denitration reaction mechanism；
The ammonia feed mechanism and the air feed mechanism are connected to the ammonia sky mixed organization, the ammonia sky mixing machine
Structure and the jet mechanism connection, the jet mechanism and the denitration reaction mechanism are each provided in the horizontal cigarette furnace of the MTO, and
Direction along the horizontal cigarette kiln gas circulation of the MTO is set gradually；
The air feed mechanism includes air heater, and the air heater is located in the horizontal cigarette furnace of the MTO.
2. equipment for denitrifying flue gas according to claim 1, which is characterized in that the air feed mechanism further includes blower；
The blower is connected to one end of the air heater, and the other end of the air heater and the described and described ammonia are empty
Mixed organization connection.
3. equipment for denitrifying flue gas according to claim 2, which is characterized in that the air heater is coil pipe.
4. equipment for denitrifying flue gas according to claim 1, which is characterized in that the ammonia feed mechanism includes ammonium hydroxide storage
Tank, ammonia water evaporator and aqua ammonia pump；
The ammonium hydroxide holding vessel is connected to by the aqua ammonia pump with the water inlet of the ammonia water evaporator, and the of the ammonia water evaporator
One gas outlet is connected to the ammonia sky mixed organization.
5. equipment for denitrifying flue gas according to claim 1, which is characterized in that the jet mechanism includes ammonia-spraying grid and whole
Flow grid；
The ammonia-spraying grid and the flow straightening grid direction that flue gas is discharged along the horizontal cigarette furnace of the MTO are successively spaced setting, described
Ammonia-spraying grid is connected to the ammonia sky mixed organization.
6. equipment for denitrifying flue gas according to claim 4, which is characterized in that the equipment for denitrifying flue gas further includes for protecting
Protect the protection mechanism of the ammonia water evaporator；
The protection mechanism includes safety valve, ammonia thinning tank and waste water pump, described safety valve one end and the ammonia water evaporator
The connection of the second gas outlet, the other end of the safety valve is connected to the ammonia thinning tank, the side of the ammonia thinning tank
The waste water pump is installed, the waste liquid after the waste water pump is used to dilute is discharged.
7. equipment for denitrifying flue gas according to claim 1, which is characterized in that the denitration reaction mechanism includes at least one layer
Catalyst and at least one steam sootblower；
The catalyst is located at one end close to the jet mechanism, and the steam sootblower is located at the jet mechanism and described
Between catalyst.
8. equipment for denitrifying flue gas according to claim 4, which is characterized in that the jet mechanism further includes water sealed tank；
The water sealed tank is connected to the ammonium hydroxide holding vessel, for improving the leakproofness of ammonium hydroxide holding vessel.
9. equipment for denitrifying flue gas according to claim 5, which is characterized in that the equipment for denitrifying flue gas further includes for controlling
Enter the ammonium hydroxide flow control mechanism of ammonia vol in ammonia sky mixed organization processed.
10. equipment for denitrifying flue gas according to claim 9, which is characterized in that the ammonia flow control mechanism includes: stream
Adjustable valve, the first detection instrument, the second detection instrument and controller；
The first detection instrument is located between the ammonia-spraying grid and flow straightening grid, and the second detection instrument is located at described de-
The one end of nitre reaction mechanism far from the flow straightening grid, the flow control valve are located at the ammonia feed mechanism and the mixing of ammonia sky
Between mechanism, the flow control valve, the first detection instrument, the second detection instrument and controller are electrically connected with the controller
It connects, the first detection signal and the second inspection that the controller is issued according to the first detection instrument and the second detection instrument
The amount that signal obtains used ammonia is surveyed, and the regulating valve is adjusted according to the amount of used ammonia.
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| CN201920666156.1U CN209287047U (en) | 2019-05-09 | 2019-05-09 | Equipment for denitrifying flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920666156.1U CN209287047U (en) | 2019-05-09 | 2019-05-09 | Equipment for denitrifying flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471046A (en) * | 2022-02-16 | 2022-05-13 | 福建龙净环保股份有限公司 | Flue gas purification device and MTO regeneration flue gas purification process system |
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2019
- 2019-05-09 CN CN201920666156.1U patent/CN209287047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471046A (en) * | 2022-02-16 | 2022-05-13 | 福建龙净环保股份有限公司 | Flue gas purification device and MTO regeneration flue gas purification process system |
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