CN209060866U - A kind of combined denitration device - Google Patents

Abstract

The utility model discloses a kind of combined denitration devices, including ammonia storage tank, air pump, mixing tank, ammonification pump, fume pipe, pretreatment box, denitration case, oxidation case, denitrating tower, discharge box, lime slurry storage box, the ammonia storage tank, air pump are connected with mixing tank, and the mixing tank is connected by ammonification pump with pretreatment box；Fume pipe is also connected at the top of the pretreatment box, the right side of the pretreatment box connects denitration case, and the denitration case is connected with oxidation case；The oxidation case is connect with denitrating tower.The structure design of the utility model is reasonable, in conjunction with two kinds of main denitrating techniques, has greatly reinforced denitration effect；Reaction efficiency can effectively be controlled and save resource；Effectively remove the element sulphur in flue gas；And efficiently using fume afterheat makes proper catalyst operation；The cleaning of catalyst has been effectively ensured by ash bucket, has guaranteed catalytic efficiency；Also so that flue gas is sufficiently reacted with material by double-deck spray head of setting, denitrification rate is effectively ensured.

Description

A kind of combined denitration device

Technical field

The utility model relates to denitration technology field, specifically a kind of combined denitration device.

Background technique

Gas denitrifying technology is a cigarette of the industrial circles such as electric power, cement, boiler applied to more NO_x formations Gas purification techniques.Currently, with comparative maturity gas denitrifying technology there are mainly two types of: selective catalytic reduction technique and selection Property non-catalytic reduction denitrating technique.It nowadays is mostly using one of technique as denitration technology, this mode can have Effect saves cost, however denitration effect can not reach best.SCR is frequently with vanadium Titanium series catalyst, due to untreated cigarette Gas, the ash content and sulphur content contained is very high, so after running for a period of time, situations such as catalyst has a poisoning, mechanical wear, because Often catalyst is arranged behind filter for this, however because of catalyst temperature window at 320-450 DEG C, therefore the reaction of catalyst Temperature can be inadequate；And flue gas and material time of contact and area are insufficient in selective non-catalytic reduction denitration (SNCR) technique, It is easy to happen the halfway phenomenon of reaction.

Utility model content

The purpose of this utility model is to provide a kind of combined denitration devices, to solve mentioned above in the background art ask Topic.

To achieve the above object, the utility model provides the following technical solutions:

A kind of combined denitration device, including ammonia storage tank, air pump, mixing tank, ammonification pump, fume pipe, pretreatment box, denitration Case, oxidation case, denitrating tower, discharge box, lime slurry storage box, the ammonia storage tank generally gallbladder cystic structures；The ammonia storage tank Be connected by snorkel with mixing tank, and be also connected with an other tracheae on snorkel, the other end of the tracheae with The exhaust outlet of air pump is connected；The mixing tank by tracheae with ammonification pump bleeding point be connected, and the tracheae with Mixing tank joint is equipped with solenoid valve, and the exhaust outlet of the ammonification pump is connected by snorkel with pretreatment box；The pre- place Fume pipe is also connected at the top of reason case, and the inner right side of the pretreatment box is equipped with ammonia-spraying grid, the pretreatment box Inside left be equipped with filter；The left side of the pretreatment box connects denitration case by fume pipe, sets inside the denitration case There is denitration chamber, the left port of the fume pipe connects with the smoke inlet on the right side of denitration chamber, if being uniformly provided with inside the denitration chamber Dry catalyst, the catalyst is board-like catalyst, and the installation direction of the catalyst is parallel to flue gas flow direction, described Smoke outlet is offered on the left of denitration chamber, fume pipe is connected on the smoke outlet, the other end of the fume pipe is connected with oxidation case It connects；The oxidation case inner bottom is fixed with ozone generator, is equipped with air jet pipe, the jet at the top of the ozone generator Several spray orifices are equipped at left and right sides of pipe；The oxidation case is connected by fume pipe with the denitration chamber inside denitrating tower, described Denitration is intracavitary to be equipped with two lime slurry jet pipes, respectively the second lime slurry of the first lime slurry jet pipe of lower and eminence Jet pipe, and the bottom of the two lime slurry jet pipe is fixedly connected to several spray heads, the two lime slurry jet pipe One end be closed port, the other end is connected with the discharge gate of lime slurry delivery pump, the pumping of the lime slurry delivery pump Material mouth is connected with lime slurry storage box；Smoke outlet is offered at the top of the denitrating tower, the denitrating tower inner bottom is set There is waste material bucket, the waste material bucket bottom is equipped with discharge port.

As a further solution of the present invention: the ammonia storage tank is equipped with pressure gauge, and in snorkel and storage ammonia The junction of tank is equipped with throttle valve.

The bottom of the denitration chamber is open as a further solution of the present invention, and denitration chamber bottom It is connected with ash bucket, the ash bucket is funnel-shaped structure, and hopper bottom is equipped with discharge valve.

The middle section of the fume pipe is located inside denitration case as a further solution of the present invention, and 180 degree are bent, the fume pipe lower section of generally horizontal U-shaped structure, the U-shaped is equipped with denitration chamber, and in denitration chamber Heat storage is fixed between fume pipe, the heat storage is honeycomb ceramic heat accumulator.

The denitration tower bottom is fixed with discharge box, the discharge box as a further solution of the present invention, Generally rectangular parallelepiped structure.

The junction of the lime slurry storage box and drainage conduit is equipped with as a further solution of the present invention, Regulating valve, the regulating valve is solenoid valve, and is additionally provided with flowmeter on the right side of the regulating valve.

The denitrating tower inner tip is additionally provided with demister as a further solution of the present invention,.

Thermal insulation board is equipped between the oxidation case and denitration case as a further solution of the present invention,.

Compared with prior art, the utility model has the beneficial effects that the structure design of the utility model is reasonable, in conjunction with two kinds Main denitrating technique, has greatly reinforced denitration effect；By the way that ammonia will effectively be concentrated in mixing tank internal mix ammonia and air Concentration adjust to predetermined concentration, then the ammonia modulated is transported in pretreatment box by ammoniating pump, and period is logical Excess pressure table can be easy to understand the air pressure inside ammonia storage tank, and then judge the reserves of ammonia；And in the first snorkel and storage The junction of ammonia tank is equipped with throttle valve, facilitates the flow for adjusting ammonia, precisely facilitates, and effectively controls reaction efficiency and saves money Source；By mixing flue gas to be processed with ammonia inside pretreatment box, the sulfur dioxide in flue gas reacts generation with ammonia The particulate matters such as sulfurous amine salt effectively remove the element sulphur in flue gas, then effectively filter out the impurity in flue gas by filter The grain particulate matters such as object and newly generated sulfurous amine salt；Filtered flue gas is entered inside denitration chamber by smoke inlet, and with Catalyst contact, because by the waste heat of flue gas in heat storage Collection utilization fume pipe, and effectively pass to inside denitration chamber Catalyst, so that catalyst is obtained 300 degree or more of normal working temperature, denitrification rate be effectively ensured and can save The energy, purified flue gas pass through fume pipe again and enter in oxidation case, and flue gas is mixed with the ozone of penetrating first to be reached Oxidation to residual NOx；It is intracavitary that flue gas through peroxidating enters the denitration inside denitrating tower, by upper layer and lower layer spray head to flue gas Lime slurry is sprayed, flue gas is sufficiently mixed with the lime slurry and reacts, the NOx in the flue gas and the lime slurry are anti- Calcium nitrate should be generated, the calcium nitrate is deposited to the bottom of oxidation and denitration tower, is discharged outside tower by discharge box, last denitration purification Flue gas afterwards is discharged using demister defogging by the smoke outlet on denitrating tower top；And with the progress of reaction, in flue gas Some ashes not removed can be deposited on catalyst surface, and finally fall under gravity into ash-unloading hopper, when running up to one Openable discharge valve carries out unloading ash after quantitative, and the cleaning of catalyst is effectively ensured, and guarantees catalytic efficiency.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of combined denitration device.

Fig. 2 is the enlarged structure schematic diagram of A in Fig. 1.

Fig. 3 is the structural schematic diagram of denitration chamber in combined denitration device.

Fig. 4 is the internal structure top view of denitration case in combined denitration device.

In figure: 1- ammonia storage tank；2- air pump；3- mixing tank；4- ammonification pump；5- pretreatment box；6- fume pipe；7- denitration Case；8- aoxidizes case；9- denitrating tower；10- discharge box；11- lime slurry storage box；12- lime slurry delivery pump；13- denitration chamber； 14- heat storage；15- ash bucket；16- ozone generator；17- air jet pipe；18- waste material bucket；19- denitration chamber；The first lime white of 20- Body jet pipe；21- the second lime slurry jet pipe；22- spray head；23- demister；24- smoke outlet；25- thermal insulation board；26- pressure gauge； 27- throttle valve；28- ammonia-spraying grid；29- filter；30- catalyst；31- regulating valve；32- flowmeter.

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 Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Please refer to Fig. 1~4, a kind of combined denitration device, including ammonia storage tank 1, air pump 2, mixing tank 3, ammonification pump 4, cigarette Tracheae 6, pretreatment box 5, denitration case 7, oxidation case 8, denitrating tower 9, discharge box 10, lime slurry storage box 11, the ammonia storage tank 1 Generally gallbladder cystic structures facilitate the more ammonias of storage, and compressive property is good；The ammonia storage tank 1 by snorkel with mix Case 3 is connected, and an other tracheae is also connected on snorkel, the other end of the tracheae and the exhaust outlet of air pump 2 It is connected；By effectively the concentration that ammonia is concentrated being adjusted to predetermined concentration, side in 3 internal mix ammonia of mixing tank and air Just the use of next step；The mixing tank 3 by tracheae with ammonification pump 4 bleeding point be connected, and the tracheae with mix 3 joint of case is equipped with solenoid valve, and the exhaust outlet of the ammonification pump 4 is connected by snorkel with pretreatment box 5；The pretreatment The top of case 5 is also connected with fume pipe 6, and the inner right side of the pretreatment box 5 is equipped with ammonia-spraying grid 28, the pretreatment The inside left of case 5 is equipped with filter 29；By mixing flue gas to be processed with ammonia inside pretreatment box 5, in flue gas Sulfur dioxide reacted with ammonia and generate the particulate matters such as sulfurous amine salt, effectively remove the element sulphur in flue gas, then pass through filter 13 effectively filter out the particulate matters such as impurity particle object and the newly generated sulfurous amine salt in flue gas；The left side of the pretreatment box 5 Denitration case 7 is connected by fume pipe 6, is equipped with denitration chamber 13, the left port and denitration of the fume pipe 6 inside the denitration case 7 The smoke inlet on 13 right side of room connects, if being uniformly provided with dry catalyst 30 inside the denitration chamber 13, the catalyst 30 is plate Formula catalyst, and the installation direction of the catalyst 30 is parallel to flue gas flow direction, offers smoke evacuation on the left of the denitration chamber 13 Mouthful, fume pipe 6 is connected on the smoke outlet, the other end of the fume pipe 6 is connected with oxidation case 8；Inside the oxidation case 8 Bottom end is fixed with ozone generator 16, is equipped with air jet pipe 17, the left and right of the air jet pipe 17 at the top of the ozone generator 16 Two sides are equipped with several spray orifices；The oxidation case 8 is connected by fume pipe 6 with the denitration chamber 19 inside denitrating tower 9, described de- Two lime slurry jet pipes, respectively the second lime white of the first lime slurry jet pipe 20 and eminence of lower are equipped in nitre chamber 19 Body jet pipe 21, and the bottom of the two lime slurry jet pipe is fixedly connected to several spray heads 22, two lime whites One end of body jet pipe is closed port, and the other end is connected with the discharge gate of lime slurry delivery pump 12, and the lime slurry is defeated The extraction opening of pump 12 is sent to be connected with lime slurry storage box 11；The top of the denitrating tower 9 offers smoke outlet 24, described de- 9 inner bottom of nitre tower is equipped with waste material bucket 18, and 18 bottom of waste material bucket is equipped with discharge port.

Further, ammonia storage tank 1 described in the utility model is equipped with pressure gauge 26, is easy to understand storage ammonia by pressure gauge 26 Air pressure inside tank 1, and then judge the reserves of ammonia；And throttle valve 27, side are equipped in the junction of snorkel and ammonia storage tank 1 Just the flow for adjusting ammonia, precisely facilitates, and effectively controls reaction efficiency and saves resource.

Further, the bottom of denitration chamber 13 described in the utility model is open, and 13 bottom of denitration chamber is connected with Ash bucket 15, the ash bucket 15 is funnel-shaped structure, and 15 bottom of ash bucket is equipped with discharge valve；With the progress of reaction, in flue gas Some ashes not removed can be deposited on catalyst surface, and finally fall under gravity into ash bucket 15, when running up to one Openable discharge valve carries out unloading ash after quantitative, and the cleaning of catalyst 30 is effectively ensured, and guarantees catalytic efficiency.

Further, the middle section of fume pipe 6 described in the utility model is located inside denitration case 7, and bends 100 80 degree, generally horizontal U-shaped structure is equipped with denitration chamber 13 below the fume pipe 6 of the U-shaped, and denitration chamber 13 with Heat storage 14 is fixed between fume pipe 6, the heat storage 14 is honeycomb ceramic heat accumulator, collects benefit by heat storage 14 With the waste heat of flue gas in fume pipe 6, and the catalyst 30 inside denitration chamber 13 is effectively passed to, catalyst 30 is enable to obtain The normal working temperature for obtaining 300 degree or more, effectively eliminates the nitre in flue gas and can save the energy.

Further, 9 bottom of denitrating tower described in the utility model is fixed with discharge box 10, and the discharge box 10 is generally Rectangular parallelepiped structure had not only facilitated fixed denitrating tower 9, but also the waste material that easy cleaning denitrating tower 9 generates by discharge box 10.

Further, the junction of lime slurry storage box 11 described in the utility model and drainage conduit is equipped with regulating valve 31, the regulating valve 31 is solenoid valve, and the right side of the regulating valve 31 is additionally provided with flowmeter 32, can by flowmeter 32 The effectively inventory of metering discharge is capable of the rate of material addition by regulating valve 31, is precisely controlled, effectively prevent material unrestrained Take.

Further, 9 inner tip of denitrating tower described in the utility model is additionally provided with demister 23, effectively removes with flue gas one With the fog risen.

Further, thermal insulation board 25 is equipped between oxidation case 8 and denitration case 7 described in the utility model, it is effectively heat-insulated, guarantee Oxidation efficiency.

The working principle of the utility model is: ammonia will effectively be concentrated by 3 internal mix ammonia of mixing tank and air Concentration adjust to predetermined concentration, then 4 the ammonia modulated is transported in pretreatment box 5 by ammonification pump；By pre- Flue gas to be processed is mixed with ammonia inside treatment box 5, the sulfur dioxide in flue gas is reacted with ammonia generates sulfurous amine salt etc. Particulate matter, effectively removes the element sulphur in flue gas, then effectively filters out impurity particle object in flue gas and new by filter 29 The particulate matters such as the sulfurous amine salt of generation；Filtered flue gas is entered inside denitration chamber 13 by smoke inlet, and and catalyst 30 contacts, because by the waste heat of flue gas in 14 Collection utilization fume pipe 6 of heat storage, and effectively pass to inside denitration chamber 13 Catalyst 30, so that catalyst 30 is obtained 300 degree or more of normal working temperature, denitrification rate be effectively ensured and can Save the energy；Purified flue gas passes through fume pipe 6 again and enters in oxidation case 8, and flue gas mixes with the ozone of penetrating connect first Touching reaches the oxidation to residual NOx；Flue gas through peroxidating enters in the denitration chamber 19 inside denitrating tower 9, passes through upper layer and lower layer Spray head 22 sprays lime slurry to flue gas, mixes flue gas with the lime slurry, the NOx in the flue gas and the lime white Precursor reactant generates calcium nitrate, and the calcium nitrate is deposited to the bottom of oxidation and denitration tower 9, is discharged outside tower by discharge box 10, finally The purified flue gas of denitration is discharged using 23 defogging of demister by the smoke outlet 24 on 9 top of denitrating tower；And with reaction Progress, some ashes not removed can be deposited on 30 surface of catalyst in flue gas, and finally fall under gravity into ash bucket In 15, openable discharge valve carries out unloading ash after running up to a certain amount of, and the cleaning of catalyst 30 is effectively ensured, and guarantees catalysis effect Rate.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (8)

1. a kind of combined denitration device, including ammonia storage tank (1), air pump (2), mixing tank (3), ammonification pump (4), fume pipe (6), Pretreatment box (5), denitration case (7), oxidation case (8), denitrating tower (9), discharge box (10), lime slurry storage box (11), it is special Sign is: the ammonia storage tank (1) generally gallbladder cystic structures；The ammonia storage tank (1) is connected by snorkel with mixing tank (3) It connects, and is also connected with an other tracheae on snorkel, the other end of the tracheae is connected with the exhaust outlet of air pump (2) It connects；The mixing tank (3) is connected by tracheae with the bleeding point of ammonification pump (4), and the tracheae connects with mixing tank (3) Place is equipped with solenoid valve, and the exhaust outlet of the ammonification pump (4) is connected by snorkel with pretreatment box (5)；The pretreatment box (5) it is also connected at the top of fume pipe (6), and the inner right side of the pretreatment box (5) is equipped with ammonia-spraying grid (28), it is described The inside left of pretreatment box (5) is equipped with filter (29)；The left side of the pretreatment box (5) is de- by fume pipe (6) connection Nitre case (7), the denitration case (7) is internal to be equipped with denitration chamber (13), on the right side of the left port of the fume pipe (6) and denitration chamber (13) Smoke inlet connect, for the denitration chamber (13) if internal be uniformly provided with dry catalyst (30), the catalyst (30) is board-like Catalyst, and the installation direction of the catalyst (30) is parallel to flue gas flow direction, the row of offering on the left of the denitration chamber (13) Mouth is connected to fume pipe (6) on the smoke outlet, and the other end of the fume pipe (6) is connected with oxidation case (8)；The oxygen Change case (8) inner bottom to be fixed with ozone generator (16), is equipped with air jet pipe (17) at the top of the ozone generator (16), institute It states and is equipped with several spray orifices at left and right sides of air jet pipe (17)；The oxidation case (8) passes through in fume pipe (6) and denitrating tower (9) The denitration chamber (19) in portion is connected, and two lime slurry jet pipes, respectively the first lime of lower are equipped in the denitration chamber (19) Second lime slurry jet pipe (21) of slurry jet pipe (20) and eminence, and the bottom of the two lime slurry jet pipe is fixed It is connected with several spray heads (22), one end of the two lime slurry jet pipe is closed port, the other end and lime slurry pipeline steel The discharge gate of pump (12) is connected, and the extraction opening of the lime slurry delivery pump (12) is connected with lime slurry storage box (11) It connects；It is offered smoke outlet (24) at the top of the denitrating tower (9), denitrating tower (9) inner bottom is equipped with waste material bucket (18), institute Waste material bucket (18) bottom is stated equipped with discharge port.

2. combined denitration device according to claim 1, it is characterised in that: the ammonia storage tank (1) is equipped with pressure gauge (26), throttle valve (27) and in the junction of snorkel Yu ammonia storage tank (1) are equipped with.

3. combined denitration device according to claim 1, it is characterised in that: the bottom of the denitration chamber (13) is to open Formula, and denitration chamber (13) bottom is connected with ash bucket (15), the ash bucket (15) are funnel-shaped structure, and ash bucket (15) bottom Equipped with discharge valve.

4. combined denitration device according to claim 1, it is characterised in that: the middle section of the fume pipe (6) is located at Denitration case (7) is internal, and bends 180 degree, generally horizontal U-shaped structure, sets below the fume pipe (6) of the U-shaped Have denitration chamber (13), and is fixed with heat storage (14) between denitration chamber (13) and fume pipe (6), the heat storage (14) For honeycomb ceramic heat accumulator.

5. combined denitration device according to claim 1, it is characterised in that: denitrating tower (9) bottom, which is fixed with, unloads Hopper (10), the discharge box (10) generally rectangular parallelepiped structure.

6. combined denitration device according to claim 1, it is characterised in that: the lime slurry storage box (11) and discharge The junction of pipe is equipped with regulating valve (31), and the regulating valve (31) is solenoid valve, and the right side of the regulating valve (31) is also Equipped with flowmeter (32).

7. combined denitration device according to claim 1, it is characterised in that: denitrating tower (9) inner tip is additionally provided with Demister (23).

8. combined denitration device according to claim 1, it is characterised in that: between the oxidation case (8) and denitration case (7) Equipped with thermal insulation board (25).