CN107138042A

CN107138042A - A kind of flue gas denitrification equipment line

Info

Publication number: CN107138042A
Application number: CN201710528835.8A
Authority: CN
Inventors: 麻强; 王维江; 王怀金; 李立松; 荀鹏; 王平; 廖玉珍; 李登嵩
Original assignee: Chengdu Guo Hua Environmental Protection Technology Co Ltd
Current assignee: Chengdu Guo Hua Environmental Protection Technology Co Ltd
Priority date: 2017-07-01
Filing date: 2017-07-01
Publication date: 2017-09-08

Abstract

The application is related to environmental protection industry (epi) technical field of atmospheric pollution control, specifically related to a kind of flue gas denitrification equipment line, including flue gas conditioning component and at least one denitrating tower, the denitrating tower, including tower body, at least one catalyst assembly is provided with the tower body, the catalyst assembly includes at least two screen assemblies, the 3rd shrouding is connected between the relative edge of the screen assembly, the screen assembly is encircled into for entering flue gas or discharging the second cavity of flue gas with the 3rd shrouding, and denitrating catalyst is filled with the first cavity of the screen assembly.The denitration device line of the application, due to using quenched component and denitrating tower with above-mentioned catalyst assembly, the denitration efficiency during denitrating flue gas not only greatly improved, and, also the removal efficiency of nitrogen oxides in effluent greatly improved, also solve because ammonia can not react completely and caused by the escaping of ammonia the problem of.

Description

A kind of flue gas denitrification equipment line

Technical field

The application is related to environmental protection industry (epi) technical field of atmospheric pollution control, and in particular to a kind of flue gas denitrification equipment line.

Background technology

In industrial smoke, the usual substantial amounts of nitrogen oxides of implication, and nitrogen oxides is one of main atmosphere pollution, It is also to cause the main cause of acid rain, photochemical fog, higher ground level ozone concentrations and greenhouse effects, seriously compromises the mankind Health and living environment.Therefore, actively research and develop gas denitrifying technology, with important environmental benefit, economic benefit and Social benefit.

At present, the removing for nitrogen oxides in effluent is typically to be realized using denitration device line, just current denitration For equipment line, the denitrating tower being connected mainly including ammonia-gas spraying device and with ammonia-gas spraying device is filled with catalyst in denitrating tower, Its operation principle is to deliver into flue gas and ammonia in denitrating tower, under the catalytic action of catalyst, the nitrogen oxidation in flue gas Thing is reduced into nitrogen and water, in this way, realizing the removing of nitrogen oxides in effluent.

It is further using and design work in, inventor has found, just above-mentioned at present this for the de- of industrial smoke For nitre equipment line, deficiency is still also there are, is characterized in particular in：In current denitration device line, catalyst is typically to be deposited in On grid, by denitrating tower be divided into above and below two parts, when in use, the mixed gas of flue gas and ammonia enters catalyst layer Lower section, is then up through catalyst layer, in this process, realizes the removing of nitrogen oxides, still, because catalyst is usually Discrete particle, can only be that workman is floating by the upside of catalyst by experience after being deposited on grid, so catalyst layer Shape and thickness and bad control；When catalyst layer thickness is uneven, in relatively thin position, its resistance is smaller, and flue gas is a large amount of Passed through from relatively thin position, be unfavorable for the removing of nitrogen oxides in effluent, easily occur nitrogen oxides in effluent removal efficiency compared with Low the problem of.

The content of the invention

The purpose of the application is：For current denitration device line denitration rate it is not high the problem of can be improved there is provided one kind The denitration device line apparatus of denitration rate.

In order to realize foregoing invention purpose, this application provides following technical scheme：

A kind of liquid ammonia evaporator for denitration device line, including liquefied ammonia delivery pipe, described liquefied ammonia delivery pipe one end is and liquefied ammonia The liquefied ammonia entrance point of source connection, the other end is to be provided with some radiating fins outside ammonia outlet end, the liquefied ammonia delivery pipe.

The liquid ammonia evaporator of the application, by setting radiating fin outside liquefied ammonia delivery pipe, improves liquefied ammonia delivery pipe and outer The heat exchange area in portion space, in this way, making liquefied ammonia in course of conveying, more completely can gasify to form ammonia, i.e. improve The rate of gasification of liquefied ammonia, in this way, and then improve the mixing adequacy of ammonia and flue gas, on the one hand improve denitration efficiency and improve The removal efficiency of nitrogen oxides in effluent, on the other hand, also solve because ammonia can not react completely and caused by the escaping of ammonia the problem of.

It is preferred that, finned tube is arranged with outside the liquefied ammonia delivery pipe, the radiating fin is to be set in the fin pipe outer wall The fin put.Using finned tube, when carrying out the manufacture of liquid ammonia evaporator, directly finned tube is set in outside liquefied ammonia delivery pipe i.e. Can, procedure of processing is simplified, manufacturing cost and manufacture difficulty is also reduced；Other finned tube can directly outsourcing, also further Facilitate processing and manufacture.

It is preferred that, the fin inside pipe wall fits with the liquefied ammonia delivery pipe.It is arranged such, it is ensured that radiating fin is to liquid The heat exchanger effectiveness of ammonia delivery pipe.

As another preferred scheme, the radiating fin is connected to liquefied ammonia conveying pipe outer wall, and with the liquefied ammonia Delivery pipe formation integral structure.It is arranged such, liquefied ammonia delivery pipe directly carries out heat exchange with radiating fin and exterior space, enters One step improves heat exchanger effectiveness, further ensure that the adequacy of liquid ammonia gasification.

It is preferred that, the liquid ammonia evaporator also includes the air-blast device towards the radiating fin air blast.By setting drum Wind apparatus, fast speed belt walks the air around radiating fin, further improves the heat exchanger effectiveness of liquefied ammonia delivery pipe.

As another preferred scheme, the liquid ammonia evaporator also includes the exhausting for taking air between the fin away Device.

By setting air-blast device or extractor fan, fast speed belt walks the air around radiating fin, further to improve The heat exchanger effectiveness of liquefied ammonia delivery pipe.

It is preferred that, liquid ammonia evaporator also includes casing air, and the casing air is sheathed on outside the liquefied ammonia delivery pipe, And be coated on the radiating fin interior.

It is preferred that, it is spaced apart between the radiating fin outer rim and the casing air inwall.

Using set-up mode described above, it is controlled using the cold air to being produced during liquid ammonia gasification, it is to avoid cold air Other equipment or process are adversely affected.

It is preferred that, the end corresponding with the ammonia outlet end is air intlet end, the other end on the casing air For air outlet slit end, the air outlet slit end is connected with exterior space, and the air intlet end is connected with air-blast device, the drum Wind apparatus flows to opposite air-flow towards blasting in the casing air with liquefied ammonia.

As another preferred scheme, the end corresponding with the liquefied ammonia entrance point is air outlet slit on the casing air End, the other end is air intlet end, and the air intlet end is connected with exterior space, and the air outlet slit end connects with extractor fan Connect, the extractor fan is used to extract the air in the casing air out, and formed and liquefied ammonia flow direction in the casing air Opposite air-flow.

By the above-mentioned means, air-blast device or extractor fan improve the air stream opposite with liquefied ammonia conveying direction, enter one The heat exchanger effectiveness improved between radiating fin and extraneous air of step.

It is preferred that, the liquefied ammonia delivery pipe is to be bent to the reciprocal shape structure being made up of multiple straight tubes and multiple bend pipes.

As it is another preferably, the liquefied ammonia delivery pipe is bent to helical form or reciprocal convoluted.

Using aforesaid way so that, on the one hand it is that can save space-consuming, on the other hand, can be with the confined space The longer liquefied ammonia delivery pipe of arrangement, and more radiating fins are arranged, in this way, the gasification for further improving liquefied ammonia is abundant Property.

A kind of quenched pipe for denitration device line, including quenched cylinder, described quenched cylinder one end are quenched import, separately One end is quenched outlet, and the quenched pipe also includes ammonia inlet pipe, and wherein one end of the ammonia inlet pipe is stretched into described quenched In cylinder, it is external that the other end is located at the conditioning tube.

The quenched pipe of the application, when in use, air is blasted at quenched import or other send out in the middle part of denitrating technique Biochemical reaction other, the ammonia of high concentration is diluted, is allowed to be changed into the relatively low ammonia of concentration, on the one hand, make directly Make the gasification of liquefied ammonia cmpletely, on the other hand, be also more favorable for ammonia and mixed with the uniform of flue gas, in this way, improving denitration effect Rate, it is ensured that more fully remove the nitrogen oxides of flue gas.

It is preferred that, it is connected with the first shower nozzle on the end that the ammonia inlet pipe is located in the conditioning tube body.By setting First shower nozzle, it is spurting or sprinkling shape when entering in conditioning tube body to make ammonia, with higher flow velocity, is mixed with air When, it can further improve the uniformity that ammonia is mixed with air.

It is preferred that, the quenched cylinder includes air inlet section, mixing section and air outlet section, and the mixing section is located at the air inlet Between section and air outlet section, the internal diameter of the air inlet section is more than the internal diameter of the mixing section, and first shower nozzle is located at the air inlet In section or in the mixing section.

The internal diameter of air inlet section is more than the internal diameter of mixing section so that flow velocity is improved when air passes through mixing section, is additionally, since interior The change in footpath, turbulent flow is changed into by the advection of air, further improves the uniformity that ammonia is mixed with air.

It is further preferred that the shower nozzle is located in the mixing section.

It is further preferred that the internal diameter of the air outlet section is more than the internal diameter of the mixing section.The internal diameter for stating air outlet section is more than The internal diameter of mixing section, due to the increase of internal diameter, air outlet section formation diffuser, mixed airflow is spread in air outlet section, and air-flow is entered One step is disturbed, in this way, further increasing the uniformity that ammonia is mixed with air.

It is preferred that, First Transition section, the First Transition section are additionally provided between the air inlet section and the mixing section Larger for one end, the less horn-like structure of the other end, the big end of the First Transition section is connected with the air inlet section, described The small end of First Transition section is connected with the mixing section.

It is preferred that, the second changeover portion, second changeover portion are additionally provided between the air outlet section and the mixing section It is larger for one end, the less horn-like structure of the other end, the big end of second changeover portion is connected with the air outlet section, described The small end of second changeover portion is connected with the mixing section.

On the one hand it is to ensure that quenched pipe has good structural strength by setting First Transition section and the second changeover portion, Stress concentration caused by caliber mutation is avoided, on the other hand, larger resistance is also avoided the formation of, facilitates the stream of airflow smooth It is dynamic.

It is preferred that, air inlet section and/or First Transition section and/or mixing section and/or the second changeover portion and/or air outlet section it is interior Blade is provided with wall.

It is preferred that, the blade is helical form.

It is preferred that, the rotation direction positioned at the mixing section intra vane is with being located at the oppositely oriented of air inlet section intra vane.

Described above, during air current flow, the disturbance of further increase air-flow further improves air and ammonia The uniformity of mixing.

A kind of ammonia-spraying grid for denitration device line, including spray ammonia supervisor, the spray ammonia are responsible for one end and quenched pipe Quenched outlet, the other end is located in the flue connected with denitration tower flue gas inlet pipe, and the spray ammonia supervisor is located at described Part in flue is to be provided with some second shower nozzles in spray ammonia section, the spray ammonia section.

The ammonia-spraying grid of the application, by the second shower nozzle, the low concentration ammonia after mixing air is sprayed into flue, So that flue gas and ammonia are sufficiently mixed before denitrating tower is entered, it is ensured that the nitrogen oxides in denitrating tower, flue gas can More sufficiently contacted with ammonia, and then improve the removal efficiency to nitrogen oxides in effluent.

It is preferred that, some spray ammonia branch pipes, spray ammonia branch pipe one end closing, the other end and institute are also associated with spray ammonia supervisor The internal switching of spray ammonia supervisor is stated, some second shower nozzles are provided with the spray ammonia branch pipe.By the way of being sprayed using many places, enter One step is improved the mixing uniformity of flue gas and ammonia.

It is preferred that, adjacent be spaced apart of spray ammonia branch pipe has distance.

It is preferred that, it is described spray ammonia branch pipe with it is described perpendicular with flue gas flow direction in the flue.

It is preferred that, second shower nozzle is towards the flue gas direction of flow in the flue.

Pass through such scheme, the mixing uniformity of be further enhanced flue gas and ammonia.

It is preferred that, the end of the spray ammonia branch pipe and the inwall of the flue are spaced apart.Ammonia-spraying grid is facilitated to set Put in flue.

It is preferred that, spray ammonia section being radially arranged along the flue of the spray ammonia supervisor, the spray ammonia branch pipe distribution In the both sides of the spray ammonia section.

It is preferred that, it is to be arranged symmetrically between the spray ammonia branch pipe of the spray ammonia section both sides.

Scheme described above so that the ammonia air flow direction of ejection with flue gas flow direction on the contrary, in this way, in flue shape Into fierce flow perturbation, the uniformity that flue gas is mixed with ammonia is further improved.

It is preferred that, the ammonia-spraying grid also includes fixed mount, and the fixed mount is connected between each spray ammonia branch pipe.

It is preferred that, the fixed mount is at least two, is connected between the spray ammonia branch pipe of the spray ammonia supervisor side It is connected at least one described fixed mount.

By setting fixed mount, the structural strength of the application ammonia-spraying grid is improved.

It is preferred that, the position being fixedly connected at one with the flue is at least there are on the fixed mount.

It is preferred that, the inwall of the two ends of the fixed mount respectively with the flue is fixedly connected.

Pass through fixed mount, it is ensured that the installation reliability of ammonia-spraying grid.

A kind of flue gas conditioning component for denitration device line, including above-mentioned quenched pipe and ammonia-spraying grid, it is described quenched The quenched outlet of pipe is connected with the spray ammonia supervisor of ammonia-spraying grid, and the quenched import of the quenched pipe is also associated with blower fan, the wind Machine is used to blast air towards in the quenched pipe or blasts other gases not chemically reacted in denitrification process.

The flue gas conditioning component of the application, first by ammonia and air or other do not chemically reacted in denitrification process Gas mixed, ammonia concentration reduction increases the ammonia volume that mix with flue gas, in this way, it is mixed with flue gas to improve ammonia The uniformity of conjunction, and then ensure that the nitrogen oxides in flue gas more can be contacted sufficiently with ammonia, and then improve to flue gas The removal efficiency of middle nitrogen oxides.

It is preferred that, the ammonia flow gauge for measuring ammonia flow in ammonia inlet pipe is also associated with the ammonia inlet pipe.

It is preferred that, the ammonia regulating valve for adjusting ammonia flow in ammonia inlet pipe is also associated with the ammonia inlet pipe.

It is preferred that, it is additionally provided with the flue in the ammonia-spraying grid flue gas direction of flow for detecting flue gas The flue gas concentration analyzer of concentration.

It is preferred that, it is additionally provided with the flue in the ammonia-spraying grid flue gas direction of flow for detecting flue gas The flue gas flow meter of flow.

By above-mentioned setting, in use, the convenient grasp to parameters, can according to flue gas concentration and/or Flow is adjusted to ammonia flow, ammonia is had suitable input, it is ensured that nitrogen oxides in effluent is more completely taken off Remove, can avoid ammonia inlet excessive again and cause residual, caused by further pollute.

It is preferred that, the ammonia flow gauge, flue gas concentration analyzer and flue gas flow meter communicate with the ammonia regulating valve Connection.

It is preferred that, the ammonia regulating valve is magnetic valve.

Ammonia regulating valve is controlled by the data message of ammonia flow gauge, flue gas concentration analyzer and flue gas flow meter Aperture, the convenient control to ammonia flow.

A kind of screen assembly for denitration device line, has be used to loading denitrating catalyst the in the screen assembly To there is two parts be to cross cigarette portion for what flue gas was passed through in one cavity, the side wall of first cavity, if it is described cross cigarette portion be with The reticular lamina of dry through hole is silk screen, and the aperture of the reticular lamina or silk screen is less than the particle diameter of the denitrating catalyst.Make Used time, flue gas is entered in the denitrating catalyst of the first cavity by one of cigarette portion of crossing, space through denitrating catalyst or The outflow of cigarette portion is crossed by another behind gap between denitrating catalyst, in this process, the nitrogen oxides in flue gas is in catalyst Nitrogen and water are reduced to by ammonia under effect, and then realize the removing to nitrogen oxides in effluent；Also, due to catalyst layer position , can be by the shape of cavity, the shape of catalyst layer in the first cavity, and then easily ensure that catalyst layer has More unified thickness, in this way, improving the removal efficiency to nitrogen oxides in effluent；Another further aspect, using traditional catalyst layer, Because its upper side is not blocked, so, it is even more smooth in accumulation, but with the passage used, in mixing Under gas push, catalyst granules is easily shifted over, and wider runner is easily formed in catalyst layer, in this way, also significantly The removal efficiency of nitrogen oxides is reduced, and in the application, due to the support and stop of cavity wall, can effectively keep catalysis The stabilization of agent particle position, and then keep that there is good removal of nitrogen oxide rate.

It is preferred that, the reticular lamina or silk screen are located at the relative both sides of first cavity respectively.Ensure that flue gas can be When passing through cigarette portion, it can be contacted with catalyst, further ensure denitration efficiency.

It is preferred that, the screen assembly is rectangular shape or class rectangular shape, and the cigarette portion of crossing is the silk screen group Two side plates on part length direction, the side plate for crossing cigarette portion width is the first shrouding without through hole.By relative side Plate is integrally made using silk screen or reticular lamina, is on the one hand to improve the efficiency that flue gas is passed through, on the other hand, also more de- Denox catalyst can be participated in denitration work, so, also further increase denitration efficiency.

As a kind of preferred scheme, upper edge and the top plate connection of denitrating tower for crossing cigarette portion and the first shrouding, under The bottom plate connection of lateral edges and denitrating tower, cigarette portion, the first shrouding, the top plate of denitrating tower and the bottom plate crossed is encircled into described first Cavity.

Using aforesaid way the first cavity of formation, element of installation can be saved, but also made cigarette portion that there is bigger face Product, further improves denitration efficiency；And make that there is good structural integrity between screen assembly and denitrating tower, it is ensured that silk Being reliably connected between screen component and denitrating tower.

It is described to cross between cigarette portion and the upper edge of the first shrouding as another preferred scheme, and lower edge it Between be all connected with the second shrouding, cigarette portion, the first shrouding and second shrouding crossed is encircled into first cavity.

Using this kind of mode, by setting the first shrouding and the second shrouding so that the screen assembly of the application can be with taking off Nitre tower is relatively independent, in assembling or maintenance, loading or removal that can be overall, the maintenance in convenient for assembly and later stage.

It is preferred that, it is provided with the charge pipe being connected with first cavity, the charge pipe at the top of first cavity On be removably connected with cover plate.

It is preferred that, the charge pipe is several.

It is preferred that, first cavity bottom is provided with the discharge duct being connected with first cavity, the discharge duct On be removably connected with cover plate.

It is preferred that, the discharge duct is several.

The charge pipe and discharge duct some by setting, facilitates the filling and replacing of denitrating catalyst, also, de- in filling During denox catalyst, it can conveniently ensure that denitrating catalyst fills up whole first cavity.

It is preferred that, in the vertical direction, the charge pipe is staggeredly arranged with the discharge duct.

It is described above to set, it can reduce in denitrating catalyst filling process, to the impact at discharge duct, improve the application Reliability of structure.

A kind of support component for denitration device line, including some Turbogrid plates for being used to support cigarette portion, the grid The upper end of plate is connected with denitrating tower top plate, and lower end is connected with the denitrating tower bottom plate.

Because silk screen or reticular lamina have weaker structural strength, by setting support component, Turbogrid plates are to catalyst The cigarette portion crossed in component is supported, be on the one hand the installation reliability for improving screen assembly, on the other hand, it is ensured that cross cigarette Portion can keep Cause Form after filling denitrating catalyst, it is to avoid cause silk screen or reticular lamina to become because denitrating catalyst is filled The problem of shape.

It is preferred that, each crosses cigarette portion one Turbogrid plates of correspondence.Ensure that each described Turbogrid plates can be accessed Reliable support.

It is preferred that, the Turbogrid plates are located on the outside of the screen assembly.

Make Turbogrid plates while playing a supporting role, and do not influence the internal structure of screen assembly, it is to avoid denitration is urged The filling of agent is adversely affected.

It is preferred that, it is provided with reinforcement on the Turbogrid plates.

It is preferred that, the reinforcement is some, and the reinforcement on the same Turbogrid plates is to be spaced apart Set.

By setting reinforcement, the support strength of Turbogrid plates is improved.

It is preferred that, coordinate or fit for gap between the Turbogrid plates and the outer wall for crossing cigarette portion.

It is further ensured that Turbogrid plates to crossing the support that cigarette portion is quantified.

A kind of catalyst assembly for denitration device line, including at least two above-mentioned screen assemblies, in the silk screen Be connected with the 3rd shrouding between the relative edge of component, the screen assembly be encircled into the 3rd shrouding be used for into flue gas or Person discharges in the second cavity of flue gas, the first cavity of the screen assembly and is filled with denitrating catalyst.

Catalyst assembly in the application, the second cavity is encircled into using at least two screen assemblies and the 3rd shrouding, In actual use, catalyst assembly is arranged in denitrating tower, when the flue gas inlet pipe of denitrating tower is connected with the second cavity, flue gas outlet pipe Connected with catalyst assembly exterior space, when the flue gas outlet pipe of denitrating tower is connected with the second cavity, flue gas inlet pipe and catalyst group Part exterior space is connected, in this way, flue gas can be passed through from any screen assembly, is improved the circulation efficiency of flue gas, is improved de- The denitration efficiency of sulphur tower.

It is preferred that, the upside of the screen assembly and the top plate of the denitrating tower coordinate, downside and the bottom of the denitrating tower Plate is engaged, and the top plate and bottom plate of the denitrating tower are used as the 3rd shrouding.

Described above, the application catalyst can be simplified as the 3rd shrouding using the top plate and bottom plate of denitrating tower body The structure of component, saves manufacturing cost.

It is preferred that, each screen assembly is corresponding to be provided with above-mentioned support component.Ensure each screen assembly Can be supported the support of component.

At least one above-mentioned catalyst assembly is provided with a kind of denitrating tower, including tower body, the tower body.

The denitrating tower of the application, using above-mentioned catalyst assembly, catalyst assembly is arranged in the tower body of denitrating tower, respectively Individual catalyst assembly forms independent smoke catalytic component, on the one hand, for single catalytic module, and it has at least two Screen component, i.e. equivalent to having two while the Catalytic Layers of work, for more traditional denitration tower structure, with bigger catalysis Area, and then with higher denitration efficiency, moreover, in itself, catalyst assembly can also be multiple, the catalysis of Catalytic Layer Area is more significantly increased, and also make it that the denitration efficiency of the denitrating tower of the application is significantly increased；Another further aspect, when urging When agent component is two and the above, one of them can also be chosen, several or whole carries out denitration work according to actual needs Make, one of them can also be reserved or several as standby, so, it can be adjusted correspondingly and select according to actual needs Select, in this way, also expanding the scope of application of the application denitrating tower.

It is preferred that, the catalyst assembly is to be spaced apart between at least two, the catalyst assembly.Avoid catalyst Mutually have a negative impact between component, it is ensured that flue gas passes through each catalyst assembly.

It is preferred that, flue gas inlet pipe and flue gas outlet pipe, the flue gas inlet pipe and the catalyst are provided with the denitrating tower The exterior space of component is connected, and the flue gas outlet pipe is some, and the second cavity of each catalyst assembly at least connects It is connected with a flue gas outlet pipe.

As another preferred scheme, flue gas inlet pipe and flue gas outlet pipe, the flue gas outlet pipe are provided with the denitrating tower Connected with the exterior space of the catalyst assembly, the flue gas inlet pipe is some, the of each catalyst assembly Two cavitys are at least communicated with a flue gas inlet pipe.

The flue gas inlet pipe and flue gas outlet pipe of arrangement the application denitrating tower described above, the progress of each catalyst assembly independence Denitration works, and the denitration efficiency of the application denitrating tower greatly improved.

It is preferred that, the charge pipe and discharge duct of the catalyst assembly are all reached outside the denitrating tower, the charge pipe Cover plate and the cover plate of discharge duct be all located at outside the denitrating tower.Facilitate the filling and replacing of denitration catalyst in screen assembly.

It is preferred that, it is also associated with discharging tube on the cover plate of the discharge duct, the discharging tube and the screen assembly the One cavity is connected.In this application, nitrogen oxides in effluent is reduced into nitrogen and water in denitrification process, so, in discharging Discharging tube is set on the cover plate of pipe, in time discharged the water in denitrating tower, it is to avoid the denitrating catalyst of denitration tower bottom is soaked Denitration efficiency is reduced in water.

It is preferred that, it is provided with valve on the discharging tube.By the opening of Valve controlling discharging tube, when in denitrating tower Without ponding or during less ponding, the valve is closed, it is to avoid flue gas is discharged from discharging tube.

It is preferred that, inner side of the upper end without departing from the discharging tube cover plate of the discharging tube.Facilitate the technology in denitrating tower It is flowed into discharging tube.

It is preferred that, it is additionally provided with silk screen on the inside of the corresponding discharging tube cover plate of the discharging tube.Silk screen herein, it is advised Lattice can or aperture smaller silk screen identical with the silk screen of screen assembly, by setting silk screen, it is to avoid discharging tube row During liquid, denitrating catalyst is dropped out from discharging tube, or blocks discharging tube.

A kind of denitration device line, including above-mentioned flue gas conditioning component and at least one above-mentioned denitrating tower, the denitration The flue gas inlet pipe of tower is connected with the flue of the quenched component.

The denitration device line of the application, due to using above-mentioned quenched component and denitrating tower, not only greatly improved flue gas Denitration efficiency in denitrification process, moreover, the removal efficiency of nitrogen oxides in effluent also greatly improved, is also solved because of ammonia not The problem of completely reacting and cause the escaping of ammonia.

It is preferred that, the denitrating tower is at least two, is that mode in series or in parallel is connected between the denitrating tower.

It is preferred that, the denitrating tower is two, respectively the first denitrating tower and the second denitrating tower, first denitrating tower and Flue of the flue gas inlet pipe of second denitrating tower all with the quenched component is connected.

In this scenario, the first denitrating tower and the second denitrating tower are coordination, and progress that can be simultaneously or separately takes off Nitre works, in this way, the further processing speed improved to flue gas, improves denitration efficiency.

As it is another preferably, the denitrating tower is two, respectively the first denitrating tower and the second denitrating tower, described first The flue gas inlet pipe of denitrating tower is connected with the flue of the quenched component, the flue gas outlet pipe of first denitrating tower and described the Flue gas inlet pipe or flue gas the outlet pipe connection of two denitrating towers.

In this scenario, the first denitrating tower and the second denitrating tower are cascaded structure, i.e. by by the processing of the first denitrating tower Flue gas afterwards is re-fed into the second denitrating tower and handled, in this way, greatly improving the removal efficiency to nitrogen oxides in effluent, enters one The reduction pollution of step.

Compared with prior art, the beneficial effect of the application：

The denitration device line of the application, due to using quenched component and denitrating tower with above-mentioned catalyst assembly, not only significantly The denitration efficiency during denitrating flue gas is improved, moreover, the removal efficiency of nitrogen oxides in effluent also greatly improved, is also solved Because ammonia can not react completely and caused by the escaping of ammonia the problem of.

Brief description of the drawings：

Fig. 1 is the structural representation of liquid ammonia evaporator；

Fig. 2 is the structural representation of Section A-A in Fig. 1；

Fig. 3 is the structural representation of quenched pipe；

Fig. 4 is the structural representation of ammonia-spraying grid；

Fig. 5 is Fig. 4 side view；

Fig. 6 is the structural representation of quenched component；

Fig. 7 is the structural representation of denitrating tower；

Fig. 8 is Fig. 7 top view；

Fig. 9 is Fig. 7 sectional view；

Figure 10 is the structural representation of catalyst assembly；

Figure 11 is the partial sectional view of catalyst assembly；

Figure 12 is the structural representation at discharging tube；

Figure 13 is structural representation when the first denitrating tower is connected with the second denitrating tower,

Marked the price in figure：10- liquid ammonia evaporators, 100- liquefied ammonia delivery pipes, 101- liquefied ammonia entrance points, 102- ammonia outlets end, 103- Radiating fin, 104- finned tubes, 105- air-blast devices, 106- casing airs,

The quenched imports of 107-, the quenched outlets of 108-, 109- ammonia inlet pipes, the shower nozzles of 110- first, 111- air inlet sections, 112- mixing Section, 113- air outlet sections,

114- spray ammonia supervisors, 115- flues, 116- fixed mounts, 117- denitrating towers, the shower nozzles of 118- second, 119- spray ammonia branch Pipe,

120- blower fans, 121- ammonia flow gauge, 122- flue gas concentration analyzers, 123- flue gas flow meters, 124- ammonia regulating valves,

125- filter screens, the cavitys of 126- first, 127- crosses cigarette portion, 128- top plates, the shroudings of 129- first, 130- bottom plates, 131- chargings Pipe, 132- discharge ducts, 133- Turbogrid plates, 134- reinforcements, 135- screen assemblies, the shroudings of 136- the 3rd, the cavitys of 137- second, 138- flue gas inlet pipes, 139- flue gas outlet pipes, 140- discharging tubes, 141- catalyst assemblies, the denitrating towers of 117a- first, 117b- second Denitrating tower.

Embodiment

The application is described in further detail with reference to test example and embodiment.But this should not be understood Following embodiment is only limitted to for the scope of the above-mentioned theme of the application, it is all that this is belonged to based on the technology that teachings herein is realized The scope of application.

Embodiment 1, as illustrated in fig. 1 and 2：

A kind of liquid ammonia evaporator 10 for denitration device line, including liquefied ammonia delivery pipe 100, described one end of liquefied ammonia delivery pipe 100 For the liquefied ammonia entrance point 101 being connected with liquefied ammonia source, the other end is to be provided with outside ammonia outlet end 102, the liquefied ammonia delivery pipe 100 Some radiating fins 103.

The liquid ammonia evaporator 10 of present embodiment, by the outer setting radiating fin 103 of liquefied ammonia delivery pipe 100, improving liquid Ammonia delivery pipe 100 and the heat exchange area of exterior space, in this way, making liquefied ammonia in course of conveying, can more completely gasify shape Into ammonia, i.e. improve the rate of gasification of liquefied ammonia, in this way, and then improve the mixing adequacy of ammonia and flue gas, on the one hand improve de- Nitre efficiency, on the other hand, also reduce because ammonia can not react completely and caused by the escaping of ammonia the problem of.

As one of which embodiment, finned tube 104, the radiating fin are arranged with outside the liquefied ammonia delivery pipe 100 103 be the fin set on the outer wall of finned tube 104.Using finned tube 104, when carrying out the manufacture of liquid ammonia evaporator 10, Directly finned tube 104 is set in outside liquefied ammonia delivery pipe 100, procedure of processing is simplified, also reduces manufacturing cost and system Make difficulty；Other finned tube 104 can directly outsourcing, also further facilitate processing and manufacture.

As one of which embodiment, on the basis of such scheme, the inwall of finned tube 104 and the liquefied ammonia are defeated Pipe 100 is sent to fit.It is arranged such, it is ensured that heat exchanger effectiveness of the radiating fin 103 to liquefied ammonia delivery pipe 100.

As another embodiment, the radiating fin 103 is connected to the outer wall of liquefied ammonia delivery pipe 100, and with institute State the formation integral structure of liquefied ammonia delivery pipe 100.It is arranged such, liquefied ammonia delivery pipe 100 is directly empty with radiating fin 103 and outside Between carry out heat exchange, further improve heat exchanger effectiveness, further ensure that the adequacy of liquid ammonia gasification.

As one of which embodiment, on the basis of such scheme, the liquid ammonia evaporator 10 also includes towards institute State the air-blast device 105 of the air blast of radiating fin 103.By setting air-blast device 105, the air-blast device 105 at this place is air blower, Fast speed belt walks the air around radiating fin 103, further improves the heat exchanger effectiveness of liquefied ammonia delivery pipe 100.

As another embodiment, do not show in figure, the liquid ammonia evaporator 10 also includes for taking the fin away Between air extractor fan.

By setting air-blast device 105 or extractor fan, fast speed belt walks the air around radiating fin 103, further The heat exchanger effectiveness for improving liquefied ammonia delivery pipe 100.

As one of which embodiment, on the basis of such scheme, liquid ammonia evaporator 10 also includes casing air 106, the casing air 106 is sheathed on outside the liquefied ammonia delivery pipe 100, and in the radiating fin 103 is coated on.

As one of which embodiment, on the basis of such scheme, the outer rim of radiating fin 103 and the air It is spaced apart between the inwall of sleeve pipe 106.

As one of which embodiment, on the basis of such scheme, go out on the casing air 106 with the ammonia The corresponding end in mouth end 102 is air intlet end, and the other end is air outlet slit end, and the air outlet slit end connects with exterior space Logical, the air intlet end is connected with air-blast device 105, and the air-blast device 105 is towards blasting and liquid in the casing air 106 Ammonia flows to opposite air-flow.

As another preferred scheme, the end corresponding with the liquefied ammonia entrance point 101 is sky on the casing air 106 The gas port of export, the other end is air intlet end, and the air intlet end is connected with exterior space, the air outlet slit end and exhausting Device is connected, and the extractor fan is used to extract the air in the casing air 106, and the shape in the casing air 106 out Opposite air-flow is flowed into liquefied ammonia.

By the above-mentioned means, air-blast device 105 or extractor fan improve the air stream opposite with liquefied ammonia conveying direction, enter The heat exchanger effectiveness improved between radiating fin 103 and extraneous air of one step.

As one of which embodiment, on the basis of such scheme, the liquefied ammonia delivery pipe 100 is to be bent to by many The reciprocal shape structure of individual straight tube and multiple bend pipes composition.

As another embodiment, in such scheme, the liquefied ammonia delivery pipe 100 is bent to helical form or reciprocal Convoluted.

Using aforesaid way so that, on the one hand it is that can save space-consuming, on the other hand, can be with the confined space The longer liquefied ammonia delivery pipe 100 of arrangement, and more radiating fins 103 are arranged, in this way, further improving the gasification of liquefied ammonia Adequacy.

Embodiment 2, as shown in figure 3,

A kind of quenched pipe for denitration device line, including quenched cylinder, described quenched cylinder one end are quenched import 107, separately One end is quenched outlet 108, and the quenched pipe also includes ammonia inlet pipe 109, and wherein one end of the ammonia inlet pipe 109 is stretched into In the conditioning tube body, it is external that the other end is located at the conditioning tube.

The quenched pipe of present embodiment, when in use, blasted at quenched import 107 air or other in denitrating technique Middle part chemically react other, the ammonia of high concentration is diluted, is allowed to be changed into the relatively low ammonia of concentration, on the one hand, Make directly to make the gasification of liquefied ammonia cmpletely, on the other hand, be also more favorable for ammonia and mixed with the uniform of flue gas, in this way, improving Denitration efficiency, it is ensured that more fully remove the nitrogen oxides of flue gas.

As one of which embodiment, on the basis of such scheme, the ammonia inlet pipe 109 is located at described quenched The first shower nozzle 110 is connected with end in cylinder.By setting the first shower nozzle 110, it is when ammonia is entered in conditioning tube body Spurting or sprinkling shape, with higher flow velocity, when being mixed with air, can further improve what ammonia was mixed with air Uniformity.

As one of which embodiment, on the basis of such scheme, the quenched cylinder include air inlet section 111, Mixing section 112 and air outlet section 113, the mixing section 112 are located between the air inlet section 111 and air outlet section 113, the air inlet section 111 internal diameter is more than the internal diameter of the mixing section 112, and first shower nozzle 110 is located in the air inlet section 111 or described mixed Close in section 112.

The internal diameter of air inlet section 111 is more than the internal diameter of mixing section 112 so that flow velocity is improved when air passes through mixing section 112, and And, due to the change of internal diameter, the advection of air is changed into turbulent flow, the uniformity that ammonia is mixed with air is further improved.

One of which embodiment is further used as, on the basis of such scheme, first shower nozzle 110 is located at described In mixing section 112.

One of which embodiment is further used as, on the basis of such scheme, the internal diameter of the air outlet section 113 is more than The internal diameter of the mixing section 112.The internal diameter for stating air outlet section 113 is more than the internal diameter of mixing section 112, due to the increase of internal diameter, outlet Section 113 forms diffuser, and mixed airflow is spread in air outlet section 113, and air-flow is further disturbed, in this way, further increasing The uniformity that ammonia is mixed with air.

As one of which embodiment, on the basis of such scheme, in the air inlet section 111 and the mixing section First Transition section is additionally provided between 112, the First Transition section is larger for one end, the less horn-like structure of the other end, institute The big end for stating First Transition section is connected with the air inlet section 111, the small end and the phase of mixing section 112 of the First Transition section Connection.

As one of which embodiment, on the basis of such scheme, in the air outlet section 113 and the mixing section The second changeover portion is additionally provided between 112, second changeover portion is that one end is larger, the less horn-like structure of the other end, institute The big end for stating the second changeover portion is connected with the air outlet section 113, the small end of second changeover portion and the phase of mixing section 112 Connection.

As one of which embodiment, on the basis of such scheme, air inlet section 111 and/or First Transition section and/or Blade is provided with the changeover portion of mixing section 112 and/or second and/or the inwall of air outlet section 113,（Do not show in accompanying drawing）.

As one of which embodiment, on the basis of such scheme, the blade is helical form.

As one of which embodiment, on the basis of such scheme, positioned at the rotation direction of the intra vane of mixing section 112 With positioned at the oppositely oriented of the intra vane of air inlet section 111.

Embodiment 3, as shown in Figures 4 and 5：

A kind of ammonia-spraying grid for denitration device line, including spray ammonia supervisor 114, the spray ammonia are responsible for 114 one end and quenched pipe Quenched outlet 108 connect, the other end is located in the flue 115 that connect with the flue gas inlet pipe of denitrating tower 117, described to spray ammonia master It is to be provided with some second shower nozzles 118 in spray ammonia section, the spray ammonia section that pipe 114, which is located at the part in the flue 115,.

The ammonia-spraying grid of present embodiment, by the second shower nozzle 118, flue gas is sprayed into by the low concentration ammonia after mixing air In pipeline 115 so that flue gas and ammonia are sufficiently mixed before denitrating tower 117 is entered, it is ensured that in denitrating tower 117, flue gas In nitrogen oxides more sufficiently can be contacted with ammonia, and then improve the removal efficiency to nitrogen oxides in effluent.

As one of which embodiment, on the basis of such scheme, some spray ammonia are also associated with spray ammonia supervisor 114 Branch pipe 119, one end closing of spray ammonia branch pipe 119, the other end and the internal switching of the spray ammonia supervisor 114, in the spray ammonia Some second shower nozzles 118 are provided with branch pipe 119.By the way of being sprayed using many places, be further enhanced flue gas and ammonia Mixing uniformity.

As one of which embodiment, on the basis of such scheme, adjacent spray ammonia branch pipe 119 is be spaced apart have away from From.

As one of which embodiment, on the basis of such scheme, the spray ammonia branch pipe 119 and the described and cigarette Flue gas flow direction in feed channel 115 is perpendicular.

As one of which embodiment, on the basis of such scheme, second shower nozzle 118 is towards the fume pipe Flue gas direction of flow in road 115.

As one of which embodiment, on the basis of such scheme, the end of the spray ammonia branch pipe 119 and the cigarette The inwall of feed channel 115 is spaced apart.Ammonia-spraying grid is facilitated to be arranged in flue 115.

As one of which embodiment, on the basis of such scheme, the spray ammonia section of the spray ammonia supervisor 114 is along described Being radially arranged for flue 115, it is described to spray the both sides that ammonia branch pipe 119 is distributed in the spray ammonia section.

As one of which embodiment, on the basis of such scheme, the spray ammonia positioned at the spray ammonia section both sides It is to be arranged symmetrically between branch pipe 119.

Scheme described above so that the ammonia air flow direction of ejection is with flue gas flow direction on the contrary, in this way, in flue 115 It is interior to form fierce flow perturbation, further improve the uniformity that flue gas is mixed with ammonia.

As one of which embodiment, on the basis of such scheme, the ammonia-spraying grid also includes fixed mount 116, the fixed mount 116 is connected between each spray ammonia branch pipe 119.

As one of which embodiment, on the basis of such scheme, the fixed mount 116 is at least two, is located at The spray ammonia is connected with least one described fixed mount 116 between being responsible for the spray ammonia branch pipe 119 of 114 sides.

By setting fixed mount 116, the structural strength of present embodiment ammonia-spraying grid is improved.

As one of which embodiment, on the basis of such scheme, at least it be there are on the fixed mount 116 at one The position being fixedly connected with the flue 115.

As one of which embodiment, on the basis of such scheme, the two ends of the fixed mount 116 respectively with it is described The inwall of flue 115 is fixedly connected.

Pass through fixed mount 116, it is ensured that the installation reliability of ammonia-spraying grid.

Embodiment 4, as shown in Figure 6：

A kind of flue gas conditioning component for denitration device line, including above-mentioned quenched pipe and ammonia-spraying grid, the quenched pipe Quenched outlet 108 is connected with the spray ammonia supervisor 114 of ammonia-spraying grid, and the quenched import of the quenched pipe is also associated with blower fan 120, institute Stating blower fan 120 is used to blast air towards in the quenched pipe or blasts other gas not chemically reacted in denitrification process Body.

The flue gas conditioning component of present embodiment, first by ammonia and air or other chemistry does not occur in denitrification process The gas of reaction is mixed, ammonia concentration reduction, increases the ammonia volume mixed with flue gas, in this way, improving ammonia and cigarette The uniformity of gas mixing, and then ensure that the nitrogen oxides in flue gas more can be contacted sufficiently with ammonia, and then improve pair The removal efficiency of nitrogen oxides in effluent.

As one of which embodiment, on the basis of such scheme, it is also associated with being used on the ammonia inlet pipe 109 Measure the ammonia flow gauge 121 of ammonia flow in ammonia inlet pipe 109.

As one of which embodiment, on the basis of such scheme, it is also associated with being used on the ammonia inlet pipe 109 Adjust the ammonia regulating valve 124 of ammonia flow in ammonia inlet pipe 109.

As one of which embodiment, on the basis of such scheme, in the ammonia-spraying grid flue gas direction of flow The flue gas concentration analyzer 122 for detecting flue gas concentration is additionally provided with the flue 115.

As one of which embodiment, on the basis of such scheme, in the ammonia-spraying grid flue gas direction of flow It is additionally provided with the flue 115 123 based on the flue gas flow for detecting flue gas flow.

As one of which embodiment, on the basis of such scheme, the ammonia flow gauge 121, flue gas concentration point Analyzer 122 and flue gas flow meter 123 are communicated to connect with the ammonia regulating valve 124.

As one of which embodiment, on the basis of such scheme, the ammonia regulating valve 124 is magnetic valve.

Ammonia is controlled by the data message of ammonia flow gauge 121, flue gas concentration analyzer 122 and flue gas flow meter 123 The aperture of gas regulating valve 124, the convenient control to ammonia flow.

Embodiment 5, as illustrated in figs. 8-11：

A kind of screen assembly 135 for denitration device line, includes the first cavity 126 for loading denitrating catalyst, institute It is to cross cigarette portion 127 for what flue gas was passed through to state in the side wall of the first cavity 126 to there is two parts, if it is described cross cigarette portion 127 be with The reticular lamina of dry through hole is silk screen, and the aperture of the reticular lamina or silk screen is less than the particle diameter of the denitrating catalyst.Make Used time, flue gas is entered in the denitrating catalyst of the first cavity 126 by one of cigarette portion 127 of crossing, the sky through denitrating catalyst Cigarette portion 127 is crossed behind gap between gap or denitrating catalyst by another to flow out, in this process, the nitrogen oxides in flue gas Nitrogen and water are reduced to by ammonia under catalyst action, and then realize the removing to nitrogen oxides in effluent.

As one of which embodiment, on the basis of such scheme, the reticular lamina or silk screen are located at institute respectively State the relative both sides of the first cavity 126.Ensure flue gas can through cigarette portion 127 when, can be contacted with catalyst, further Guarantee denitration efficiency.

As one of which embodiment, on the basis of such scheme, the screen assembly 135 be rectangular shape or Class rectangular shape, the cigarette portion 127 of crossing is two side plates on the length direction of screen assembly 135, described to cross cigarette portion 127 The side plate of width is the first shrouding 129 without through hole.Relative side plate is integrally made using silk screen or reticular lamina, one Aspect is to improve the efficiency that flue gas is passed through, on the other hand, and also more denitrating catalysts can be participated in denitration work, institute Also to further increase denitration efficiency.

It is described to cross cigarette portion 127 and upper edge and the top of denitrating tower 117 of the first shrouding 129 as a kind of preferred scheme Plate 128 is connected, and lower edge is connected with the bottom plate 130 of denitrating tower 117, described to cross cigarette portion 127, the first shrouding 129, denitrating tower 117 top plate 128 and bottom plate 130 is encircled into first cavity 126.

Using aforesaid way the first cavity 126 of formation, element of installation can be saved, but also cigarette portion 127 is had more Big area, further improves denitration efficiency；And make that there is good structure between screen assembly 135 and denitrating tower 117 Uniformity, it is ensured that being reliably connected between screen assembly 135 and denitrating tower 117.

It is described to cross between cigarette portion 127 and the upper edge of the first shrouding 129 as another preferred scheme, and downside The second shrouding is all connected between edge, cigarette portion 127, the first shrouding 129 and second shrouding crossed is encircled into first chamber Do not show in body 126, program figure.

Using this kind of mode, by setting the first shrouding 129 and the second shrouding so that the screen assembly of present embodiment 135 can be relatively independent with denitrating tower 117, in assembling or maintenance, loading or removal that can be overall, it is convenient for assembly and The maintenance in later stage.

As one of which embodiment, on the basis of such scheme, the top of the first cavity 126 is provided with and institute State and be removably connected with cover plate on the charge pipe 131 that the first cavity 126 is connected, the charge pipe 131.

As one of which embodiment, on the basis of such scheme, the charge pipe 131 is several.

As one of which embodiment, on the basis of such scheme, the bottom of the first cavity 126 is provided with and institute State and be removably connected with cover plate on the discharge duct 132 that the first cavity 126 is connected, the discharge duct 132.

As one of which embodiment, on the basis of such scheme, the discharge duct 132 is several.

The charge pipe 131 and discharge duct 132 some by setting, facilitates the filling and replacing of denitrating catalyst, also, When loading denitrating catalyst, it can conveniently ensure that denitrating catalyst fills up whole first cavity 126.

As one of which embodiment, on the basis of such scheme, in the vertical direction, the charge pipe 131 with The discharge duct 132 is staggeredly arranged.

It is described above to set, it can reduce in denitrating catalyst filling process, to the impact at discharge duct 132, improve this Embodiment reliability of structure.

Embodiment 6, as illustrated in figs. 8-11：

A kind of support component for denitration device line, including some Turbogrid plates 133 for being used to support cigarette portion 127, the grid The upper end of panel 133 is connected with the top plate 128 of denitrating tower 117, and lower end is connected with the bottom plate 130 of denitrating tower 117.

Because silk screen or reticular lamina have weaker structural strength, by setting support component, 133 pairs of catalysis of Turbogrid plates Cigarette portion 127 of crossing in agent component is supported, and is on the one hand the installation reliability for improving screen assembly 135, on the other hand, is also protected Cause Form can be kept after filling denitrating catalyst by having demonstrate,proved cigarette portion 127, it is to avoid cause silk because denitrating catalyst is filled The problem of net or reticular lamina are deformed.

As one of which embodiment, on the basis of such scheme, each crosses one grid of correspondence of cigarette portion 127 Panel 133.Ensure that each described Turbogrid plates 133 can access reliable support.

As one of which embodiment, on the basis of such scheme, the Turbogrid plates 133 are located at the silk screen The outside of component 135.

Make Turbogrid plates 133 while playing a supporting role, and do not influence the internal structure of screen assembly 135, it is to avoid be right The filling of denitrating catalyst is adversely affected.

As one of which embodiment, on the basis of such scheme, reinforcement is provided with the Turbogrid plates 133 134。

As one of which embodiment, on the basis of such scheme, the reinforcement 134 is some, positioned at same It is spaced apart between the reinforcement 134 on one Turbogrid plates 133.

By setting reinforcement 134, the support strength of Turbogrid plates 133 is improved.

As one of which embodiment, on the basis of such scheme, the Turbogrid plates 133 cross cigarette portion 127 with described Outer wall between for gap coordinate or fit.

It is further ensured that 133 pairs of Turbogrid plates cross the support that cigarette portion 127 is quantified.

Embodiment 7, as illustrated in figures 7-11：

A kind of catalyst assembly 141 for denitration device line, including at least two above-mentioned screen assemblies 135, in the silk The 3rd shrouding 136 is connected between the relative edge of screen component 135, the screen assembly 135 is surrounded with the 3rd shrouding 136 Into for entering flue gas or discharging the second cavity 137 of flue gas, filled with de- in the first cavity 126 of the screen assembly 135 Denox catalyst.In the present embodiment, so that catalyst assembly 141 includes two screen assemblies 135 as an example.

Catalyst assembly 141 in present embodiment, is surrounded using at least two screen assemblies 135 and the 3rd shrouding 136 Into the second cavity 137, in actual use, catalyst assembly 141 is arranged in denitrating tower 117, when the flue gas of denitrating tower 117 enters Pipe 138 is connected with the second cavity 137, and flue gas outlet pipe 139 is connected with the exterior space of catalyst assembly 141, when the cigarette of denitrating tower 117 Gas outlet pipe 139 is connected with the second cavity 137, and flue gas inlet pipe 138 is connected with the exterior space of catalyst assembly 141, in this way, flue gas can To be passed through from any screen assembly 135, the circulation efficiency of flue gas is improved, the denitration efficiency of desulfurizing tower is improved.

As one of which embodiment, on the basis of such scheme, the upside of the screen assembly 135 takes off with described The top plate 128 of nitre tower 117 coordinates, and downside is engaged with the bottom plate 130 of the denitrating tower 117, the top plate of the denitrating tower 117 128 and bottom plate 130 be used as the 3rd shrouding 136.

Described above, it can be simplified as the 3rd shrouding 136 using the top plate 128 and bottom plate 130 of the body of denitrating tower 117 The structure of present embodiment catalyst assembly 141, saves manufacturing cost.

As one of which embodiment, on the basis of such scheme, each screen assembly 135 is corresponding to be set There is above-mentioned support component.Ensureing each screen assembly 135 can be supported the support of component.

Embodiment 8, as shown in fig.7-12：

A kind of denitrating tower 117, the denitrating tower 117 includes being provided with least one above-mentioned catalyst in tower body, the tower body Component 141.

The denitrating tower 117 of present embodiment, using above-mentioned catalyst assembly 141, catalyst assembly 141 is arranged on denitration In the tower body of tower 117, each catalyst assembly 141 forms independent smoke catalytic component, on the one hand, with regard to single catalytic module Speech, it has at least two screen assemblies 135, i.e. equivalent to the Catalytic Layer for having two work simultaneously, more traditional denitrating tower For 117 structures, with bigger catalysis area, and then with higher denitration efficiency, moreover, in itself, catalyst group Part 141 can also be multiple, and the catalysis area of Catalytic Layer is more significantly increased, and also cause the denitrating tower of present embodiment 117 denitration efficiency is significantly increased；Another further aspect, can also be according to reality when catalyst assembly 141 is two and the above Border needs, and chooses one of them, several or whole carries out denitration work, can also reserve one of them or several as standby With, so, it can be adjusted correspondingly and select according to actual needs, in this way, also expanding present embodiment denitrating tower 117 The scope of application.

As one of which embodiment, on the basis of such scheme, be spaced apart of the catalyst assembly 141 sets Put.Avoid mutually having a negative impact between catalyst assembly 141, it is ensured that flue gas passes through each catalyst assembly 141.

As one of which embodiment, on the basis of such scheme, flue gas inlet pipe is provided with the denitrating tower 117 138 and flue gas outlet pipe 139, the exterior space of the flue gas inlet pipe 138 and the catalyst assembly is connected, the flue gas outlet pipe 139 be some, and the second cavity 137 of each catalyst assembly 141 is at least communicated with a flue gas outlet pipe 139。

As another preferred scheme, flue gas inlet pipe 138 and flue gas outlet pipe 139 are provided with the denitrating tower 117, it is described The exterior space of flue gas outlet pipe 139 and the catalyst assembly is connected, and the flue gas inlet pipe 138 is some, described in each Second cavity 137 of catalyst assembly 141 is at least communicated with a flue gas inlet pipe 138.

The flue gas inlet pipe 138 and flue gas outlet pipe 139 of arrangement present embodiment denitrating tower 117 described above, each catalyst The independent carry out denitration work of component 141, greatly improved the denitration efficiency of present embodiment denitrating tower 117.

As one of which embodiment, on the basis of such scheme, the charge pipe 131 of the catalyst assembly 141 All reached outside the denitrating tower 117 with discharge duct 132, the cover plate of the charge pipe 131 and the cover plate of discharge duct 132 are all located at Outside the denitrating tower 117.Facilitate the filling and replacing of denitration catalyst in screen assembly 135.

As one of which embodiment, on the basis of such scheme, it is also connected with the cover plate of the discharge duct 132 There is discharging tube 140, the discharging tube 140 is connected with the cavity 126 of screen assembly 135 first.In the present embodiment, flue gas Middle nitrogen oxides is reduced into nitrogen and water in denitrification process, so, discharging tube is set on the cover plate of discharge duct 132 140, the water in denitrating tower 117 is discharged in time, it is to avoid the denitrating catalyst of the bottom of denitrating tower 117 is soaked in water and reduced Denitration efficiency.

As one of which embodiment, on the basis of such scheme, valve is provided with the discharging tube 140.It is logical The opening of Valve controlling discharging tube 140 is crossed, without ponding or during less ponding in the denitrating tower 117, the valve is closed, keeps away Exempt from flue gas to discharge from discharging tube 140.

As one of which embodiment, on the basis of such scheme, the upper end of the discharging tube 140 is without departing from described The inner side of the cover plate of discharge duct 132.Facilitate the technology entry in denitrating tower 117 into discharging tube 140.

As one of which embodiment, on the basis of such scheme, the corresponding discharge duct of the discharging tube 140 Filter screen 125 is additionally provided with the inside of 132 cover plates.Filter screen 125 herein, its specification can be identical with the silk screen of screen assembly 135, Can be the smaller silk screen in aperture, by setting filter screen 125, it is to avoid discharging tube 140 is in discharge opeing, and denitrating catalyst is from discharging tube 140 drop out, or block discharging tube 140.

Embodiment 9, as shown in figures 1-13：

A kind of denitration device line, including above-mentioned flue gas conditioning component and at least one above-mentioned denitrating tower 117, the denitrating tower 117 flue gas inlet pipe 138 is connected with the flue 115 of the quenched component.

The denitration device line of present embodiment, due to using above-mentioned quenched component and denitrating tower 117, is not only greatly improved Denitration efficiency during denitrating flue gas, moreover, also greatly improved the removal efficiency of nitrogen oxides in effluent, also solve because The problem of ammonia can not completely react and cause the escaping of ammonia

As a kind of embodiment, it between at least two, the denitrating tower 117 is in series or in parallel that the denitrating tower 117, which is, Mode connect.

As a kind of embodiment, the denitrating tower 117 is two, respectively the first denitrating tower 117a and the second denitrating tower Fume pipe of 117b, the first denitrating tower 117a and the second denitrating tower 117b the flue gas inlet pipe 138 all with the quenched component Road 115 is connected.

In this scenario, the first denitrating tower 117a and the second denitrating tower 117b is coordination, can be simultaneously or separately Carry out denitration work, in this way, the further processing speed improved to flue gas, improves denitration efficiency.

As another embodiment, the denitrating tower 117 is two, respectively the first denitrating tower 117a and the second denitration Tower 117b, the flue gas inlet pipe 138 of the first denitrating tower 117a is connected with the flue 115 of the quenched component, and described One denitrating tower 117a flue gas outlet pipe 139 and the flue gas inlet pipe 138 or flue gas outlet pipe 139 of the second denitrating tower 117b connect It is logical.

In this scenario, the first denitrating tower 117a and the second denitrating tower 117b is cascaded structure, i.e. will pass through the first denitration Flue gas after tower 117a processing is re-fed into the second denitrating tower 117b and handled, in this way, greatly improving to nitrogen oxygen in flue gas The removal efficiency of compound, it is further to reduce pollution.

Above example only not limits technical scheme described herein to illustrate the application, although this explanation Book has been carried out detailed description to the application with reference to each above-mentioned embodiment, but the application is not limited to above-mentioned specific implementation Mode, therefore any the application is modified or equivalent substitution；And the technical side of all spirit and scope for not departing from invention Case and its improvement, it all should cover among claims hereof scope.

Claims

1. a kind of flue gas denitrification equipment line, it is characterised in that：Including flue gas conditioning component and at least one denitrating tower, the denitration At least one catalyst assembly is provided with tower, including tower body, the tower body, the catalyst assembly includes at least two silk screens Component, is connected with the 3rd shrouding between the relative edge of the screen assembly, and the screen assembly is closed with the 3rd shrouding Surround for entering flue gas or discharging the second cavity of flue gas, denitration catalyst is filled with the first cavity of the screen assembly Agent.

2. flue gas denitrification equipment line according to claim 1, it is characterised in that：The denitrating tower is at least two, described It is that mode in series or in parallel is connected between denitrating tower.

3. flue gas denitrification equipment line according to claim 1, it is characterised in that：The denitrating tower is two, respectively the One denitrating tower and the second denitrating tower, the cigarette of the flue gas inlet pipe of first denitrating tower and the second denitrating tower all with the quenched component Feed channel is connected.

4. flue gas denitrification equipment line according to claim 1, it is characterised in that：The denitrating tower is two, respectively the One denitrating tower and the second denitrating tower, the flue gas inlet pipe of first denitrating tower are connected with the flue of the quenched component, institute The flue gas outlet pipe of the first denitrating tower is stated to connect with the flue gas inlet pipe or flue gas outlet pipe of second denitrating tower.

5. flue gas denitrification equipment line according to claim 4, it is characterised in that：The charge pipe of the catalyst assembly and unload Expects pipe is all reached outside the denitrating tower, and the cover plate of the charge pipe and the cover plate of discharge duct are all located at outside the denitrating tower.

6. flue gas denitrification equipment line according to claim 5, it is characterised in that：The flue gas conditioning component includes quenched pipe And ammonia-spraying grid, described quenched cylinder one end is quenched import, and the other end is quenched outlet, the ammonia-spraying grid, including spray ammonia Supervisor, the quenched outlet of the quenched pipe is connected with the spray ammonia supervisor of ammonia-spraying grid, and the quenched import of the quenched pipe is also connected with There is blower fan, the blower fan is used to blast air towards in the quenched pipe or blast other do not occur chemistry in denitrification process instead The gas answered.

7. flue gas denitrification equipment line according to claim 6, it is characterised in that：The spray ammonia is responsible for one end and quenched pipe Quenched outlet, the other end is located in the flue connected with denitration tower flue gas inlet pipe, and the spray ammonia supervisor is located at described Part in flue is to be provided with some second shower nozzles in spray ammonia section, the spray ammonia section.

8. flue gas denitrification equipment line according to claim 6, it is characterised in that：Some spray ammonia are also associated with spray ammonia supervisor Branch pipe, spray ammonia branch pipe one end closing, the other end and the internal switching of the spray ammonia supervisor, are set on the spray ammonia branch pipe There are some second shower nozzles.

9. the flue gas denitrification equipment line according to claim 1-8 any one, it is characterised in that：Have in the screen assembly There is the mistake to there are two parts to be passed through for flue gas in the first cavity for loading denitrating catalyst, the side wall of first cavity Cigarette portion, the reticular lamina with some through holes is in the cigarette portion excessively or is silk screen, and the aperture of the reticular lamina or silk screen is less than The particle diameter of the denitrating catalyst.

10. flue gas denitrification equipment line according to claim 9, it is characterised in that：The reticular lamina or silk screen distinguish position In the relative both sides of first cavity.