CN206853478U - Utilize the ammonia spraying and mixing system of outside filtering type dust catcher gas purifying chamber structure - Google Patents

Abstract

It the utility model is related to the ammonia spraying and mixing system using outside filtering type dust catcher gas purifying chamber structure.Including：Ammonia-spraying grid 1, the ammonia-spraying grid 1 are made up of installation ammonia administration component 3 and ammonia branch pipe 4；The ammonia branch pipe 4 is provided with ammonia nozzle 5, and every ammonia branch pipe 4 is corresponding to be provided with control valve 7 and instrumentation group 8；The air-purifying chamber 2 of outside filtering type deduster, the air-purifying chamber 2 include the confined space that the locular wall of air-purifying chamber is formed with card 10；Filter element 9, the filter element 9 are arranged on the card aperture 12 of bag filter tubesheet 10；Injection tube 11, the injection tube 11 are arranged on the top of filter element 9.The system takes full advantage of intrinsic confined space structure, internals and the injection tube mounting layer of air-purifying chamber as static mixer, saves equipment investment；Avoid and set up static mixer and caused equipment resistance；Big in section, the relatively low air-purifying chamber of flue gas flow rate installs ammonia-spraying grid, and SR increase is smaller；Reduce system operation energy consumption.

Description

Utilize the ammonia spraying and mixing system of outside filtering type dust catcher gas purifying chamber structure

Technical field

The utility model belongs to flue gases purification field, and in particular to utilizes the spray of outside filtering type dust catcher gas purifying chamber structure Ammonia hybrid system.

Background technology

Nitrogen oxides is very big to the detrimental effect of environment, and it is both to form one of main matter of acid rain, and is formed big An important factor of the important substance of photochemical fog and consumption ozone in gas.Industrial high temperature flue gas mainly uses reducing agent （Ammonia, urea, alkane etc.）Occur chemical reaction nitrogen oxides reduction with nitrogen oxides, reducing agent with ammonia using more, from And reach the purification of nitrogen oxides in effluent, SCR technique（SCR）It is one of major technique.

Nitrogen oxides is very big to the detrimental effect of environment, and it is both to form one of main matter of acid rain, and is formed big An important factor of the important substance of photochemical fog and consumption ozone in gas.Industrial high temperature flue gas mainly uses reducing agent （Ammonia, urea, alkane etc.）Occur chemical reaction nitrogen oxides reduction with nitrogen oxides, reducing agent with ammonia using more, from And reach the purification of nitrogen oxides in effluent, SCR technique（SCR）It is one of major technique.

Patent publication No. CN205435252U document discloses a kind of integration dust-removing denitration desulfurizer, by spray ammonia system System is combined with pulse dust cleaning system, with ammonia replacement filter bag ash removal compressed air, due to many injection tubes of upper box in turn or friendship Replace, be interrupted deashing, local filtration element, pulse jet ammonia, neither can guarantee that the sustainable supply of ammonia, can not also ensure ammonia Uniformly, metering injection flue gas, flue gas mixing is uneven, and denitration efficiency will be caused unstable, and ammonia escapement ratio is high.

Patent publication No. CN205307996U document discloses de-dusting de-nitration integrated, directly by ammonia-spraying grid cloth Put on the top of catalyst module, mixing length is short, and smokeless blender, it is impossible to realizes that reducing agent mixes with flue gas nitrogen oxide Close well, consequence is that denitration efficiency is low low with ammonia escapement ratio.

Patent publication No. CN105107349A document discloses a kind of flue gases of cock oven desulphurization denitration combined purifying technique Device, deduster upper box is extended as Benitration reactor, grid is injected reductant into and is placed in denitrification catalyst module entrance, Flue gas blender is not provided with, because upper box aisle spare is big, flue gas flow rate is low, and reducing agent and flue gas mixed effect are worse.

Three above patent document is the typical process of dedusting denitrification integral, such as sets up static mixer, and flue needs to increase It is long, and system operation resistance increases.

In traditional typical selective-catalytic-reduction denitrified technique, the flue section installation spray ammonia in catalyst module front end Grid and flue gas blender and flue gas fairing, retain the flue of sufficient length after blender and fairing respectively, it is ensured that Flue gas mixed effect, rectification effect, not only flue is grown, and SR is big.

The content of the invention

The purpose of this utility model is in view of the deficienciess of the prior art, providing one kind utilizes the net gas of outside filtering type deduster The ammonia spraying and mixing system of cell structure.

Technical solution of the present utility model is：Using the ammonia spraying and mixing system of outside filtering type dust catcher gas purifying chamber structure, Including：

Ammonia-spraying grid, the ammonia-spraying grid are made up of installation ammonia administration component and ammonia branch pipe；The ammonia branch pipe peace Equipped with ammonia nozzle, with flange coupling in ammonia administration component；Every ammonia branch pipe is correspondingly provided with control valve and detector Table group, the ammonia flow and operating mode of separately adjustable ammonia branch pipe corresponding with detection；

The air-purifying chamber of outside filtering type deduster, the air-purifying chamber include the confined space that the locular wall of air-purifying chamber is formed with card, The air-purifying chamber has exhanst gas outlet；

Filter element, the filter element are arranged on the card aperture of bag filter tubesheet, for will enter air-purifying chamber Flue gas is divided into independent several pieces, enters air-purifying chamber with shape of plasma jet；The flow injection metering of corresponding every part of smoke gas jet unit Ammonia, ammonia from ammonia nozzle with aperture mode of jet inject；Realization is accurate to flue gas, is uniformly injected into ammonia；

The ammonia-spraying grid is arranged in the air-purifying chamber of outside filtering type deduster；

Injection tube, the injection tube are arranged on air-purifying chamber；The injection tube is arranged on the top of filter element；

One one ammonia-spraying grid of air-purifying chamber separate configurations, or multiple air-purifying chambers share an ammonia-spraying grid.

According to the utility model embodiment, the outlet in the card aperture and filter element is provided with blowing pressurized air and drawn Flow device Venturi tube；Or installation jet deflector；The jet deflector includes but is not limited to triangle, rectangle, trapezoidal, polygon Shape, semicircle or half elliptic.

According to the utility model embodiment, the injection tube both sides are symmetrically installed side wing；The blade of the side wing Shape includes but is not limited to rectangle, trapezoidal, polygon, semicircle or half elliptic.

According to the utility model embodiment, when the filter element uses center jetting deashing mode, the installation of ammonia branch pipe At the injection tube back side, ammonia nozzle and filter element are coaxial, ammonia nozzle towards with flue gas aperture jet stream to consistent.

According to the utility model embodiment, when the filter element uses center jetting deashing mode, the installation of ammonia branch pipe At the injection tube back side, ammonia nozzle and filter element are coaxial, ammonia nozzle towards with flue gas aperture jet stream to consistent.

According to the utility model embodiment, when the filter element uses center jetting deashing mode, ammonia branch pipe arrangement In passage or exported between passage, injection tube and air-purifying chamber wallboard between deashing device injection tube, i.e. filter element aperture cigarette In the plane turbulent jet region that gas jet is formed between injection tube in passage, the axis of ammonia nozzle is adjacent positioned at two respectively The line of symmetry of filter element axis, ammonia nozzle are consistent towards being flowed to plane turbulent jet.

According to the utility model embodiment, when the filter element uses center jetting deashing mode, ammonia branch pipe arrangement Between deashing device injection tube between passage, injection tube and air-purifying chamber wallboard passage entrance, close to card side, i.e. flue gas is put down Region before the turbulent jet formation of face, the axis of ammonia nozzle are located at the line of symmetry of two adjacent filter element axis, ammonia respectively The ammonia jet of gas jets and the aperture jet of filter element form parallel jet, and passage is mixed to form plane between injection tube Turbulent jet.

According to the utility model embodiment, when the filter element uses annular space jetting deashing mode, ammonia branch pipe and ammonia Gas jets are directly installed in filter element exiting flue gas jet, and ammonia nozzle and filter element are coaxial, ammonia nozzle towards with Flue gas aperture jet is consistent.

According to the utility model embodiment, when the filter element uses annular space jetting deashing mode, ammonia branch pipe arrangement Filtering element outlet jet Mixed Zone is drained through two, is drained through that filtering element is parallel with corresponding two, the axis difference position of ammonia nozzle It is consistent with filter element aperture smoke gas jet in the line of symmetry of two adjacent filter element axis, the outlet direction of ammonia nozzle；Separately A piece ammonia branch pipe is respectively being installed close to two side wall panels.

According to the utility model embodiment, when the filter element uses annular space jetting deashing mode, ammonia branch pipe arrangement Between two are drained through filtering element, close to card side, ammonia nozzle, which is located at adjacent two filter elements aperture smoke gas jet, not to be mixed The region of conjunction, the axis of ammonia nozzle is located at the line of symmetry of two adjacent filter element axis respectively, separately each close to two side wall panels A piece ammonia branch pipe is installed, the aperture jet of the ammonia jet of ammonia nozzle and filter element forms in the same direction flat on ammonia branch pipe Row jet.

According to the utility model embodiment, the section of the filter element includes but is not limited to long flat mouth, ellipse and round mouth Form；When filter element section is round mouth shape, oval small-bore form, an aperture smoke gas jet is corresponding with a compression Air nozzle；When filter element section is long flat mouth form, smoke gas jet enters air-purifying chamber in a manner of plane jet, to accrued The ammonia of amount supply smoke gas jet is sprayed into the multiple ammonia nozzles being evenly arranged on ammonia branch pipe.

When filter element does not use compressed air as deashing medium, injection tube then for other deashing medium delivery pipe roads and Its supporting member.

The utility model is by the use of dust catcher gas purifying chamber inherent structure as ammonia and the mixing arrangement of flue gas, without individually setting Flue gas static mixer is put, avoids SR increase caused by static mixer is set；Flue gas is made full use of to pass through outside filtering type During deduster dust removal by filtration, if being divided into carried interest by orderly arrangement, specification identical filter element, deduster is entered with shape of plasma jet The characteristics of air-purifying chamber, the ammonia of metering is precisely injected to corresponding per share flue gas with shape of plasma jet, form relatively independent ammonia with The mixed cell of flue gas；The flow pattern for making full use of jet to be blended strongly with peripheral fluid generation, makes full use of ammonia and cigarette The gaseous mixture of gas realizes ammonia and cigarette by the strong disturbance being subject to when air-purifying chamber injection tube mounting layer, the air-purifying chamber confined space Gas is sufficiently mixed, and all components in air-purifying chamber are all advantageous to the mixing of ammonia and flue gas.

Described hybrid system, it can also be used to the injection of the other types reducing agent needed for SCR denitrating flue gas, it can also be used to Outside filtering type dedusting collaboration handles the purification process technique of other gaseous contaminants, is put into and reacted toward flue gas using the hybrid system Medicament simultaneously uniformly mixes.

Described outside filtering type deduster, including the outside filtering type of all outlet and inlet modes and dust catcher gas purifying chamber structure type Deduster；Including and be not limited to single casing, more casing dedusters and through type deduster etc.；The flue gas air intake side of the deduster Formula includes and is not limited to middle case bottom air intake or ash bucket air intake, or therefrom body side air intake；The frame mode bag of air-purifying chamber Include and be not limited to single bin or more bin modes and various different flue gas air-out modes.

Described filter element is arranged on the card between middle case and air-purifying chamber, is specifically arranged on card aperture, In aperture exit；When the filter element uses pulse jetting deashing mode, filter element outlet is provided with injection tube；Described Pulse jetting deashing mode includes, including and is not limited to center injection method and annular space injection method.When in filter element use During heart jetting deashing mode, the flue gas static mixer that injection tube is ammonia spraying and mixing system is utilized.

Described outside filtering type deduster, when not using pulse of compressed air purge mode and using other purge modes, institute It is then other deashing medium delivery pipe roads or its supporting construction to state pulse of compressed air injection tube.

The flue gas is entered after filtering element removes particulate matter if being divided into relatively independent carried interest flue gas with mode of jet Air-purifying chamber.

If the carried interest jet that flue gas is divided into by the filter element, refer to flue gas by being installed on the filter element in card aperture After dedusting, enter air-purifying chamber from card aperture with the fluidised form of jet；Also refer to flue gas into after air-purifying chamber, pass through center injection method Injection tube mounting layer when, between the injection tube of laid out in parallel, that wallboard that injection tube is adjacent with air-purifying chamber is formed is some narrow Long-channel is by forming flue gas plane turbulent jet form；The plane turbulent jet, as injection tube is provided with flank, turbulent flow It is stronger.

The filter element outlet stops that ammonia-spraying grid mounting means can refer to annular space jetting deashing outside filtering type without injection tube The ammonia-spraying grid mounting means of deduster.When there is the stop of other devices the filter element outlet, ammonia-spraying grid mounting means can With reference to the ammonia-spraying grid mounting means of center jetting deashing outside filtering type deduster.

The quantity of ammonia nozzle on the ammonia branch pipe, determined in principle by often row filter element quantity in parallel, I.e. card orifice number determines；For flat filtering element of making a slip of the tongue, along a card orifice length, ammonia branch pipe is evenly arranged multiple ammonia Gas jets, determined according to the actual conditions of implementation.

The quantity of the mixed cell of the ammonia spraying and mixing system, determined by ammonia nozzle.

The ammonia jet that bag filter tubesheet aperture smoke gas jet sprays with ammonia nozzle, is mixed respectively with unit hybrid mode Afterwards, continue to mix in the confined space of dust catcher gas purifying chamber, discharged from air-purifying chamber exhanst gas outlet, this process further ensures The mix uniformly effect of ammonia and flue gas.

The utility model make use of the smoke gas jet of the confined space of air-purifying chamber, the gaseous mixture jet of flue gas and ammonia and week Enclose the blending effect of fluid；The gaseous mixture jet of smoke gas jet, flue gas and ammonia make use of to constitute parallel penetrate in air-purifying chamber Stream, the mutual blending effect of parallel jet.

The utility model outside filtering type dust catcher gas purifying chamber has played the static mixer function of ammonia spraying and mixing system, make use of The confined space of air-purifying chamber is to the smoke gas jet of entrance, the melange effect of ammonia jet；Make use of air-purifying chamber the confined space and All components of installation melange effect strong to the flue gas of its internal circulation and the gaseous mixture of ammonia inside it.

Compared with prior art, the beneficial effects of the utility model are：（1）Take full advantage of the intrinsic limited sky of air-purifying chamber Between structure and injection tube mounting layer as static mixer, save equipment investment；（2）Avoid and set up static mixer and produce Raw equipment resistance；Big in section, the relatively low air-purifying chamber of flue gas flow rate installs ammonia-spraying grid, and SR increase is smaller； Reduce system operation energy consumption；（3）Flue gas is made full use of to be divided into some multiply independent fluidics by outside filtering type deduster filter element Mode enters the characteristics of dust catcher gas purifying chamber, is truly realized and measures injection ammonia by independent mixed cell and mix, improves Ammonia is well mixed effect, and filter element quantity is more, and mixed effect is better；（4）Make full use of fluid jet and environment space Fluid media (medium) the fluid behaviour that strong ginseng mixes heat exchange occurs；The inherent structure of air-purifying chamber is taken full advantage of, utilizes injection Pipe improves the advantage that flue gas is well mixed effect, is embodied in as static mixer：Flue gas is taken full advantage of with shape of plasma jet Into air-purifying chamber, the follow-up passage between intrinsic injection tube again, again the characteristics of formation plane jet；Make full use of limited sky The intensively mixed flow field characteristic of interior fluid；（5）Utilize all structures installed in the intrinsic flow field characteristic of deduster, air-purifying chamber The effect of part, avoids and sets up static mixer and caused equipment resistance, reduces system operation energy consumption；（6）Such as it is being blown Pipe sets up side wing, strengthens mixed effect, the blade of installation is taken root in injection tube flank, without increasing other devices of taking root；By Big in dust catcher gas purifying chamber section, overall flue gas flow rate is less than flue, and static mixer, flue gas system resistance are installed compared with flue Incrementss are small, can equally reduce system operation energy consumption；（7）The deflector of filter element outlet is such as installed, also helps dedusting The pulse dust cleaning of device, act on the sack installation Venturi tube of similar pulse dust cleaning sack cleaner；（8）With setting spray ammonia lattice in flue Grid and static mixer compare, and the flue of dedusting denitrating system is short, and arrangement is compacter, are truly realized dedusting denitration one Change.

Brief description of the drawings

Fig. 1 is ammonia-spraying grid top view.

Fig. 2 is ammonia-spraying grid elevation.

Fig. 3 is the elevation of the first mounting means of center injection outside filtering type deduster ammonia spraying and mixing system.

Fig. 4 is the side view of the first mounting means of center injection outside filtering type deduster ammonia spraying and mixing system.

Fig. 5 is the top view of the first mounting means of center injection outside filtering type deduster ammonia spraying and mixing system.

Fig. 6 is the side view of center injection outside filtering type deduster second of mounting means of ammonia spraying and mixing system.

Fig. 7 is the side view of the third mounting means of center injection outside filtering type deduster ammonia spraying and mixing system.

Fig. 8 is the elevation of the first mounting means of long flat mouth outside filtering type deduster ammonia spraying and mixing system.

Fig. 9 is the top view of the first mounting means of long flat mouth outside filtering type deduster ammonia spraying and mixing system.

Figure 10 is the elevation of the first mounting means of annular space injection outside filtering type deduster ammonia spraying and mixing system.

Figure 11 is the side view of the first mounting means of annular space injection outside filtering type deduster ammonia spraying and mixing system.

Figure 12 is the top view of annular space injection outside filtering type deduster the first mounting means of ammonia spraying and mixing system.

Figure 13 is the side view of annular space injection outside filtering type deduster the second mounting means of ammonia spraying and mixing system.

Figure 14 is the side view of the third mounting means of annular space injection outside filtering type deduster ammonia spraying and mixing system.

Figure 15 is a kind of schematic diagram of mounting means of deashing device triangle side wing plate.

In figure：1- ammonia-spraying grids；2- dust catcher gas purifying chambers；3- ammonia administration components；4- ammonia branch pipes；5- ammonia nozzles； 6- flanges；7- valves；8=instrumentation；9- filter elements；10- cards；11- injection tubes；12- cards aperture；13- jet water conservancy diversion Plate；14- side wings；15- compressed-air atomizers；16- blowing pressurized air flow diverter Venturi tubes.

Embodiment

Embodiment of the present utility model is described in detail below.Embodiment below with reference to accompanying drawing description is exemplary , it is only used for explaining the utility model, and it is not intended that to limitation of the present utility model.

The technical solution of the utility model is applied to dedusting denitrification integral process, or outside filtering type dedusting collaboration handles other The purification process technique of gaseous contaminant, mixed using the present invention toward flue gas input pharmacy response and uniformly.

As shown in Fig. 3 etc., particulate matter is removed with the outside filtering type deduster using middle case bottom air intake, then carry out SCR and take off Exemplified by the technique of nitre, illustrate the embodiment of the present invention.

Ammonia-spraying grid 1 is installed on dust catcher gas purifying chamber 2, and therefrom lower box enters outside filtering type deduster to high-temperature flue gas, warp After crossing the removing particulate matter of filter element 9 being installed on the card aperture 12 of card 10, from card aperture in a manner of smoke gas jet 12, and filter element 9 exports, into air-purifying chamber 2, the ammonia that flue gas injects with ammonia-spraying grid is sufficiently mixed, and is subsequently entered successively Enter fairing and SCR denitration reduction catalyst module, complete SCR denitration reaction.

As shown in Figure 1 and Figure 2, ammonia-spraying grid 1 is made up of ammonia administration component 3 and ammonia branch pipe 4；Ammonia branch pipe 4 is provided with Spray ammonia nozzle 5；Ammonia administration component 3 and the flange coupling 6 of ammonia branch pipe 4；Every ammonia branch pipe corresponds to the He of installation and adjustment valve 7 Instrumentation 8；Ammonia administration component 3 is coupled ammonia preparation system.

Center is blown the first embodiment of outside filtering type deduster ammonia spraying and mixing system.

As shown in Fig. 3, Fig. 4 and Fig. 5,4 public ammonia administration components 3 of more ammonia branch pipes, outside ammonia administration component 3 Connect ammonia preparation system；The ammonia branch pipe 4 being installed in air-purifying chamber 2 is linked in ammonia administration component 3 using flange 6；Each ammonia Gas branch pipe 4 is corresponding to be provided with flow control valve 7 and instrumentation group 8, controls every branch pipe ammonia flow；In air-purifying chamber 2, Multiple 9 public deashing compressed air spraying pipes 11 of filter element, each injection tube 11 are provided with multiple compressed-air atomizers 15；Corresponding to be provided with an ammonia branch pipe 4 at the back side of every injection tube 11, every ammonia branch pipe 4 is provided with multiple ammonia sprays Mouth 5；Each 5 corresponding filter element 9 of ammonia nozzle or one smoke gas jet unit, i.e., each metering of ammonia nozzle 5 output Ammonia amount correspond to one smoke gas jet flow control.

According to aforesaid way, after per share flue gas enters air-purifying chamber, due to the stop of injection tube 11, in the back side shape of injection tube 11 Into symmetrical vortices, be corresponding with one ammonia jet and inject in this group of flue gas vortex, at the same ammonia jet be in injection tube between lead to The sidepiece of the flue gas plane turbulent jet in road, ammonia mix strongly with flue gas；Form a flue gas and ammonia mixed cell.It is all The mixed ammonia of relatively independent mixed cell and flue gas gaseous mixture, carried out again in the confined space of air-purifying chamber 2 fully Mixing, mixed flue gas enter follow-up flue, and the flue gas of multiple air-purifying chambers 2 mixes in flue, last rectified mixing When passing through catalyst module, with ammonia selective catalytic reduction reaction, flue gas nitrogen oxidation occur flue gas for nitrogen oxides in effluent Thing is cleaned.

Center is blown second of embodiment of outside filtering type deduster ammonia spraying and mixing system.

As shown in fig. 6,4 public ammonia administration components 3 of more ammonia branch pipes, prepared by the external ammonia of ammonia administration component System；The ammonia branch pipe 4 being installed in air-purifying chamber 2 is linked in ammonia administration component 3 using flange 6；Each correspondence of ammonia branch pipe 4 Flow control valve 7 and instrumentation group 8 are installed, control the flow of every ammonia branch pipe 4；In air-purifying chamber 2, multiple filterings 9 public deashing compressed air spraying pipes 11 of element, each injection tube 11 are provided with multiple compressed-air atomizers 15；Injection tube Between 11, between injection tube 11 and the wallboard of adjacent air-purifying chamber 2, some parallel channels are formed, ammonia branch pipe 4 is arranged in these passages Or channel outlet, specific height determine when implementing according to jet velocity；Every ammonia branch pipe 4 is provided with multiple ammonia nozzles 5, ammonia Gas jets 4 are towards in the same direction with the flue gas aperture jet of filter element 9, the central axis of ammonia nozzle 5 and two neighboring filter element 9 Central axis is in the same plane, and the ammonia of each ammonia nozzle 5 metering output of passage is corresponding between injection tube 11 One flue gas aperture jet flow control of filter element 9, each ammonia nozzle 5 of passage is counted between injection tube 11 and locular wall The ammonia of amount output corresponds to the half control of one flue gas aperture jet flow of filter element 9.

According to aforesaid way, after the per share smoke gas jet of filter element 9 enters air-purifying chamber 2, due to the stop of injection tube 11, The both sides of injection tube 11 are divided into symmetrical two strands of jets, and the jet of two neighboring filter element 9 is mixed in the corresponding passage of injection tube 11 It is mixed, one plane jet unit is mixed to form, an ammonia nozzle 5 is corresponding with and is installed in this strand of plane jet unit, is injected Ammonia blended with aperture pattern and plane jet unit, form the mixed cell of a flue gas and ammonia.Ammonia Branch pipe 4 is arranged in above-mentioned passage, that is, is arranged in the plane turbulent jet that the smoke gas jet of filter element 9 is formed in aforementioned channels In region, two kinds of different temperatures, different medium and same direction jet different in flow rate, strong mixing occurs；All is relatively independent The mixed ammonia of mixed cell and flue gas gaseous mixture, be sufficiently mixed again in the confined space of air-purifying chamber 2, after mixing Flue gas enter follow-up flue, the flue gas of multiple air-purifying chambers 2 mixes in flue, and last rectified mixed flue gas is by urging During agent module, with ammonia selective catalytic reduction reaction occurs for nitrogen oxides in effluent, and flue gas nitrogen oxide is cleaned.

Center is blown the third embodiment of outside filtering type deduster ammonia spraying and mixing system.

As shown in fig. 7,4 public ammonia administration components 3 of more ammonia branch pipes, 3 external ammonia system of ammonia administration component Standby system；The ammonia branch pipe 4 being installed in air-purifying chamber 2 is linked in ammonia administration component 3 using flange 6；Each ammonia branch pipe 4 is right Flow control valve 7 and instrumentation group 8 should be installed, control the flow of every ammonia branch pipe 4；In air-purifying chamber 2, multiple mistakes 9 public deashing compressed air spraying pipes 11 of filtering element, each injection tube 11 are provided with multiple compressed-air atomizers 15；Injection Between pipe 11, between injection tube 11 and the wallboard of adjacent air-purifying chamber 2, some parallel channels are formed, it is logical that ammonia branch pipe 4 is arranged in these Road or feeder connection, close to the side of card 10, specific height determines when implementing according to jet velocity；Every ammonia branch pipe 4 is provided with Multiple ammonia nozzles 5, ammonia nozzle 5 towards in the same direction with the flue gas aperture jet of filter element 9, the central axis of ammonia nozzle 5 with The two neighboring central axis of filter element 9 is in the same plane, each ammonia spray of feeder connection between injection tube 11 The ammonia of the metering output of mouth 5 corresponds to one filter element flue gas aperture jet flow control, between injection tube 11 and locular wall The ammonia of each ammonia nozzle 5 metering output of feeder connection corresponds to the half of one flue gas aperture jet flow of filter element 9 Control.

According to aforesaid way, after the per share smoke gas jet of filter element 9 enters air-purifying chamber 2, due to the stop of injection tube 11, The both sides of injection tube 11 are divided into symmetrical two strands of jets, and the jet of two neighboring filter element 9 is mixed in the corresponding passage of injection tube 11 It is mixed, one plane turbulent jet unit is mixed to form, an ammonia nozzle 5 is corresponding with and is installed on this burst of non-shape of plane turbulent jet Into region before, i.e. the smoke gas jet of the ammonia jet of ammonia nozzle 5 and filter element 9 forms parallel jet, participated in preceding State passage and be mixed to form plane turbulent jet, two kinds of different temperatures, jet different in flow rate and different medium, occur strong mixed Close.The ammonia of each output of ammonia nozzle 5 is blended with circular hole pattern and adjacent flue gas aperture jet units, forms one The mixed cell of individual flue gas and ammonia.All mixed ammonias of relatively independent mixed cell and the gaseous mixture of flue gas, It is sufficiently mixed again in the confined space of air-purifying chamber 2, mixed flue gas enters follow-up flue, and the flue gas of multiple air-purifying chambers 2 exists Mixed in flue, when passing through catalyst module, nitrogen oxides in effluent selects last rectified mixed flue gas with ammonia Selecting property catalytic reduction reaction, flue gas nitrogen oxide are cleaned.

The embodiment when section of filter element 9 is long flat mouth.

As shown in Figure 8, Figure 9, the section of filter element 9 is long flat mouth 9, according to the cross dimensions of filter element 9, each filtering The exhaust gas volumn of unit, smoke gas jet speed, the factors such as ammonia amount need to be correspondingly injected, rationally determine the quantity of ammonia nozzle 5, ammonia Nozzle 5 is distributed on ammonia branch pipe 4, you can uses above-mentioned three kinds of embodiments.In principle, the quantity of ammonia nozzle 6 is more, flue gas More with ammonia mixed cell, mixed effect is better, and concrete foundation implementation condition determines.As shown in Figure 8, Figure 9, it is in long flat mouth The heart is blown the first mounting means of outside filtering type deduster ammonia spraying and mixing system.

As shown in Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, when filter element 9 is using annular space jetting deashing mode, deashing It is injector 15 with compressed-air atomizer, injector is connected with compressed air flow diverter Venturi tube 16, and filter element 9 exports no spray Blowpipe 11 stops that the ammonia-spraying grid 1 of described ammonia spraying and mixing system has three kinds of mounting means.First, such as Figure 10, Figure 11, Figure 12 Shown, ammonia branch pipe 4 and ammonia nozzle 5 are directly installed on filter element 9 and exported, and ammonia nozzle 5 and filter element 9 are coaxial, ammonia Towards consistent with flue gas aperture jet, i.e. an ammonia nozzle 5 is installed in a flue gas aperture jet gas jets 5, forms one With flue gas strong blending occurs for the mixed cell of individual ammonia jet and smoke gas jet, ammonia.Second, as shown in figure 13, ammonia Branch pipe 4 is arranged in the two smoke gas jet Mixed Zone centers being drained through between the aperture exit of filtering element 9, separately close to 2 liang of air-purifying chamber The identical height of sidewall paneling side respectively installs an ammonia branch pipe 9, the outlet direction and the aperture flue gas of filter element 9 of ammonia nozzle 5 Jet is consistent, i.e., the ammonia aperture jet of each ammonia nozzle 5 is in the flue gas aperture jet mixing region of adjacent filter elements The heart, the mixed cell of ammonia and flue gas is formed, strong blending occurs.Third, as shown in figure 13, ammonia branch pipe 4 is arranged in two It is drained through between the outlet of filtering element 9, close to the side of card 10, ammonia nozzle 5 is located at the adjacent aperture smoke gas jet of two filter element 9 and do not sent out The region of raw mixing, separately respectively installs an ammonia branch pipe 4 in the identical height close to the two side wall panels side of air-purifying chamber 2.All ammonia The ammonia aperture jet of ammonia nozzle 5 parallel jet in the same direction with the aperture jet composition of filter element 9 on gas branch pipe 4, one The aperture jet of ammonia nozzle 5 mixes with the aperture smoke gas jet of adjacent filter elements 9 forms a mixed cell, and strong mix occurs It is mixed.The ammonia amount that each ammonia nozzle 5 measures output corresponds to one flue gas aperture jet flow control of filter element 9, close to net The ammonia amount of the metering output of ammonia nozzle 5 of the wallboard of air chamber 2 corresponds to a half control of one flue gas aperture jet flow of filter element 8 System.All mixed ammonias of relatively independent mixed cell and the gaseous mixture of flue gas, enter again in the confined space of air-purifying chamber 2 Row is sufficiently mixed, and mixed flue gas enters follow-up flue, and the flue gas of multiple air-purifying chambers 2 mixes in flue, last rectified Mixed flue gas when passing through catalyst module, selective catalytic reduction reaction, flue gas occur for nitrogen oxides in effluent and ammonia Nitrogen oxides is cleaned.

The mounting means of outlet jet deflector 13 of filter element.

As shown in Figure 6, Figure 7, Venturi tube 16 is drained as the outlet of filter element 9 is provided with blowing pressurized air, can not installed Jet deflector 13.Such as without Venturi tube, jet deflector 13 can be installed.When it is implemented, according to the section of filter element 9, adjacent The spacing of two injection tube 11 and effluxvelocity etc., it is determined whether installation or the shape of installation jet deflector 13 and setting angle etc..Cross After the outlet jet of filtering element 9 enters air-purifying chamber, guided through jet deflector 13, into passage between injection tube 11, ensure to enter The flue gas of air-purifying chamber 2 passes through ammonia injection zone as far as possible.When filter element 9 enters pulse dust cleaning program, can be led by jet Flowing plate 13 induces the fluid of air-purifying chamber 2 to enter filter element 9 with compressed air, is advantageous to improve cleaning efficiency.

Strengthen the mounting means of 11 side wing of injection tube 14 of flue gas mixing.

As shown in Figure 6, Figure 7, side wing 14 is symmetrically installed in the both sides of injection tube 11, flue gas plane jet is on the side of side wing 14 Boundary layer separation occurs for edge, forms vortex, by the strong Involving velocity of vortex, strengthens the blending of jet and peripheral fluid, promotees Enter flue gas to mix with the uniform of ammonia.When it is implemented, according to the form of fracture of filter element 9, the adjacent spacing of two injection tube 11 and Effluxvelocity etc., it is determined whether installation or the installation shape of side wing 14 and setting angle etc..As shown in figure 15, a kind of delta wing A kind of installation form of the plate in injection tube 11.

The explanation of above-described embodiment is only intended to understand method and its core concept of the present utility model.It should be pointed out that pair , can also be to the utility model on the premise of the utility model principle is not departed from for one of ordinary skill in the art Some improvement and modification are carried out, these are improved and modification will be also fallen into the protection domain of the utility model claims.

Claims (10)

1. utilize the ammonia spraying and mixing system of outside filtering type dust catcher gas purifying chamber structure, it is characterised in that including：

Ammonia-spraying grid（1）, the ammonia-spraying grid（1）By installation ammonia administration component（3）With ammonia branch pipe（4）Form；The ammonia Gas branch pipe（4）Ammonia nozzle is installed（5）, with flange（6）It is linked in ammonia administration component（3）；Every ammonia branch pipe（4）It is corresponding Control valve is installed（7）With instrumentation group（8）；

The air-purifying chamber of outside filtering type deduster（2）, the air-purifying chamber（2）Locular wall and card including air-purifying chamber（10）What is formed is limited Space, the air-purifying chamber have exhanst gas outlet；

Filter element（9）, the filter element（9）Installed in bag filter tubesheet（10）Card aperture（12）On, for that will enter Enter air-purifying chamber（2）Flue gas be divided into independent several pieces, air-purifying chamber is entered with shape of plasma jet（2）；Corresponding every part of smoke gas jet list The ammonia of the flow injection metering of member, ammonia is from ammonia nozzle（5）Injected with aperture mode of jet；

The ammonia-spraying grid（1）Installed in the air-purifying chamber of outside filtering type deduster（2）It is interior；

Injection tube（11）, the injection tube（11）Installed in air-purifying chamber（2）On；The injection tube（11）It is arranged on filter element （9）Top；

One air-purifying chamber（2）One ammonia-spraying grid of separate configurations（1）, or multiple air-purifying chambers（2）Share an ammonia-spraying grid （1）.

2. the ammonia spraying and mixing system according to claim 1 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The card aperture（12）And filter element（9）Outlet blowing pressurized air flow diverter Venturi tube is installed（16）；Or peace Fill deflector（13）；The deflector（13）Including but not limited to triangle, rectangle, trapezoidal, polygon, semicircle or semiellipse Shape.

3. the ammonia spraying and mixing system according to claim 1 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The injection tube（11）Both sides are installed by side wing（14）；The side wing（14）Leaf characters include but is not limited to rectangle, ladder Shape, polygon, semicircle or half elliptic.

4. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using center jetting deashing mode, ammonia branch pipe（4）Installed in injection tube（11）The back side, ammonia spray Mouth（5）With filter element（9）Coaxially, ammonia nozzle（5）Towards with flue gas aperture jet stream to consistent.

5. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using center jetting deashing mode, ammonia branch pipe（4）It is arranged between deashing device injection tube and leads to Road, injection tube（11）With air-purifying chamber（2）In passage or exported between wallboard, i.e. filter element aperture（12）Smoke gas jet is being blown Pipe（11）Between in the plane turbulent jet region that is formed in passage, ammonia nozzle（5）Axis be located at two adjacent heads respectively Element（9）The line of symmetry of axis, ammonia nozzle（5）It is consistent towards being flowed to plane turbulent jet.

6. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using center jetting deashing mode, ammonia branch pipe（4）It is arranged between deashing device injection tube and leads to Road, injection tube（11）With air-purifying chamber（2）The entrance of passage between wallboard, close to card（10）Side, i.e. flue gas plane turbulent jet Region before formation, ammonia nozzle（5）Axis be located at two adjacent filter elements respectively（9）The line of symmetry of axis, ammonia spray Mouth（5）Ammonia jet and filter element（9）Aperture jet form parallel jet, in injection tube（11）Between passage mixing shape Into plane turbulent jet.

7. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using annular space jetting deashing mode, ammonia branch pipe（4）And ammonia nozzle（5）It is directly installed on filtering Element（9）In exiting flue gas jet, ammonia nozzle（5）With filter element（9）Coaxially, ammonia nozzle（5）Direction and flue gas aperture Jet is consistent.

8. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using annular space jetting deashing mode, ammonia branch pipe（4）It is arranged in two and is drained through filtering element（9）Outlet is penetrated Mixed Zone is flowed, filtering element is drained through with corresponding two（9）It is parallel, ammonia nozzle（5）Axis respectively positioned at two adjacent heads member Part（9）The line of symmetry of axis, ammonia nozzle（9）Outlet towards and filter element（9）Aperture smoke gas jet is consistent；Separately close Two side wall panels respectively install an ammonia branch pipe（4）.

9. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）During using annular space jetting deashing mode, ammonia branch pipe（4）It is arranged in two and is drained through filtering element（9）Between, lean on Nearly card（10）Side, ammonia nozzle（5）Positioned at adjacent two filter element（9）The region that aperture smoke gas jet does not mix, ammonia Gas jets（5）Axis be located at two adjacent filter elements respectively（5）The line of symmetry of axis, separately close to two side wall panels respectively installation one Root ammonia branch pipe（4）, ammonia branch pipe（4）Upper ammonia nozzle（5）Ammonia jet and filter element（9）Aperture jet form it is same To parallel jet.

10. the ammonia spraying and mixing system according to claim 2 using outside filtering type dust catcher gas purifying chamber structure, it is characterised in that The filter element（9）Section include but is not limited to long flat mouth, ellipse and round mouth form；Work as filter element（9）Section is circle When the degree of lip-rounding, oval small-bore form, an aperture smoke gas jet is corresponding with a compressed-air atomizer（15）；Work as filter element When section is long flat mouth form, smoke gas jet enters air-purifying chamber in a manner of plane jet（2）, corresponding metering supply smoke gas jet Ammonia is with ammonia branch pipe（4）On multiple ammonia nozzles for being evenly arranged（5）Spray into.