CN216604712U

CN216604712U - A flue gas denitration device for thermal power plant uses

Info

Publication number: CN216604712U
Application number: CN202122628566.7U
Authority: CN
Inventors: 蒋铭剑; 李煦良; 张磊; 陈金伟; 王轩; 陈海璐; 王瑞超
Original assignee: Tianjin Huanong Yangliuqing Thermoelectric Co Ltd
Current assignee: Tianjin Huanong Yangliuqing Thermoelectric Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-05-27
Anticipated expiration: 2031-10-29

Abstract

The utility model provides a flue gas denitration device for a thermal power plant. The denitration agent spraying device comprises a device main body, a mixer and a distributor, the denitration agent spraying device can enlarge the spraying range of the denitration agent and prevent large waste caused by centralized spraying by arranging a plurality of spraying components, wherein the second spraying pipe is communicated with the distributor to uniformly spray space, so that the spraying area of the lower part of the device main body, which is directly contacted with flue gas in the early stage, is further enlarged, the mixing efficiency at a flue gas outlet can be improved by arranging the mixer with a stirring device, the denitration agent is utilized in colleges and universities, and meanwhile, the flue gas can be guided by the concave arc-shaped surfaces on the stirring blades of the mixer, so that the flue gas is blown to the inner wall of the device main body, and the denitration agent on the inner wall of the device main body is utilized.

Description

A flue gas denitration device for thermal power plant uses

Technical Field

The utility model relates to the technical field of flue gas treatment of thermal power plants, in particular to a flue gas denitration device for a thermal power plant.

Background

Along with the stricter domestic electric power environmental protection emission standard, the national requirement is that the total discharge outlet NOX emission concentration of the coal-fired unit is not higher than 50mg/Nm³The denitration technology commonly used in the current Chinese market comprises selective non-catalytic reduction (SNCR) and Selective Catalytic Reduction (SCR) and SNCR/SCR combined flue gas denitration technology developed on the basis of the SNCR and the SCR. Among them, the principle of SNCR is to inject NH-containing gas into the furnace under the condition of high-temperature flue gas and no catalyst₃Reducing agent based on the nitrogen, NO in the flue gas_XReduction to N₂And H₂And O. Because the SNCR technique need not do great transformation to the flue, does not need catalyst and reactor, consequently investment cost and running cost are all lower, but be used for flue gas denitrification facility all to spray the denitration agent in inside and spray the denitration, mix the effect with the flue gas relatively poor, and partial denitration agent can be attached to the denitrification facility inner wall in addition, uses down for a long time, leads to flue gas denitrification effect to receive the influence, and the inner wall is piled up and also can be caused harm.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned technical problems, a flue gas denitration device for a thermal power plant is provided.

The technical means adopted by the utility model are as follows:

the utility model provides a flue gas denitration device for thermal power plant uses, includes device main part, blender and distributor, the device main part is cylindric or round platform form, and the upper and lower both ends of device main part are equipped with exhanst gas outlet and flue gas entry respectively, fixed position sets up the denitration agent injection assembly of at least two sets of injection denitration agents in the device main part, denitration agent injection assembly includes two at least injection pipes, and wherein, first injection pipe sprays with predetermineeing the angle, and the entry of distributor is assembled to the output of second injection pipe, evenly sprays through the distributor, the center department of device main part sets up the blender, the blender is used for mixing the stirring to flue gas and denitration agent in the space.

Further, still including magnetism formula cleaning device is inhaled, magnetism is inhaled formula cleaning device and is had magnetic suction head and set up in the outside magnet of device main part including setting up in device main part inside, and the two magnetism is connected, the flitch is scraped in suction head outside adhesion, the radian of scraping the flitch is the same with the radial radian of the same cross section department of device main part.

Furthermore, a flow guide groove is formed in the mixer.

The denitration agent spraying assembly comprises a first spraying pipe, a second spraying pipe, a distributor, a mixer, a stirring blade, a first spraying pipe, a second spraying pipe, a third spraying pipe, a fourth spraying pipe, a fifth spraying pipe and a sixth spraying pipe.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the internal structure of the present invention.

In the figure: 1. a device main body; 2. a mixer; 3. a distributor; 4. a flue gas outlet; 5. a flue gas inlet; 6. a first injection pipe; 7. a second injection pipe; 8. a flow guide groove; 9. magnetic type cleaning device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention discloses a flue gas denitration device for a thermal power plant, which includes a device main body, a mixer and a distributor, wherein the device main body 1 is cylindrical or truncated cone-shaped with a narrow top and a wide bottom, a flue gas outlet 4 and a flue gas inlet 5 are respectively arranged at the upper end and the lower end of the device main body, specifically, the flue gas outlet can be opened on a side wall or the top of the device main body, at least two sets of denitration agent injection assemblies for injecting denitration agent are arranged at fixed positions on the device main body, each denitration agent injection assembly includes at least two injection pipes, wherein a first injection pipe 6 injects at a preset angle, an output end of a second injection pipe 7 converges at an inlet of the distributor 3 and is uniformly sprayed by the distributor, the first injection pipe and the second injection pipe are only partially illustrated in the figure, and the specific number of the first injection pipe and the second injection pipe is determined according to the actual size and the flue gas flow rate of the device main body in an actual production process, the setting position of the device also takes the condition that the device can cover the inner space to the maximum extent, the center of the device main body is provided with a mixer, and the mixer 2 is used for mixing and stirring the flue gas and the denitrifier in the space.

In this embodiment, it indicates to fix first injection pipe on the device main part to predetermine the angle and spray, and simultaneously, its jet orifice has an ascending angle of slope, and its effect is to flue gas outlet, and device main part top space sprays promptly, or sets up it into the automatically controlled form, makes it can the multi-angle rotating spray, specifically, controller control adjusting device adjusts the injection angle that corresponds all first injection pipes in the injection subassembly and deflects upwards, accomplishes the denitrifier of top space and sprays.

In this embodiment, the distributor is equipped with the center and collects section and branch section, branch section sets up the side that collects the section in the center, sets up the quantity and the distribution mode of branch section according to the on-the-spot demand, be equipped with the hole that distributes evenly in the branch section, be convenient for carry out even injection in the space below, the below is the entry of flue gas, and even injection can rational utilization denitrifier, reduces the condition that the denitrifier sprays on the inner wall. The second injection pipe applies certain pressure to enable the denitration agent to be gathered in the central gathering section and then is sprayed out from the small holes of the branch sections in a compression mode, the distributor can be a groove type liquid distributor or a coil type distributor, the selection and the size specification of the distributor are also set according to the specification of the device body, and the denitration device is a conventional technical means in the field.

In order to clear up the denitrifier that adheres to on the device inner wall, as preferred embodiment, still including magnetism formula cleaning device 9 of inhaling, magnetism formula cleaning device is including setting up in the inside magnetic suction head that has of device main part and setting up in the outside magnet of device main part, the two magnetism is connected, the flitch is scraped in the outside adhesion of suction head, the radian of scraping the flitch is the same with the radial radian of the same cross section department of device main part, when the device main part is cylindricly promptly, its radian is the same with cylindrical circumference radian, and when it is the round platform form, the radian of scraping the flitch is the same with its radian that sets up the position, still can set up guide slot isotructure in order to guarantee its fastness, magnetism formula cleaning device is people workman man-hour, can be or electronic, when installation push-pull rod on outside magnet, makes things convenient for the staff to snatch and clear up. When the electric device is powered, the electric device is connected with the main control device and can run on a given path. When the main body of the device is cylindrical, the scraping plate can move in a circle and can also move up and down, and in order to prevent the scraping plate from touching the injection pipe, a striking mark can be arranged on the shell, so that workers can avoid the injection pipe conveniently, and the damage to the injection pipe caused by the collision of the scraping plate and the injection pipe is reduced; when the device main part is the round platform form, then according to practical experience, remain the biggest or great region to spraying and set up arc magnet, the clearance in the circumference, it remains mainly to scrape the denitrifier through the left and right sides of scraper blade, and the bottom of device main part is equipped with the manhole door of being convenient for clean, and the denitrifier residual material of being scraped the flitch clearance drops to the inside bottom of device main part through the action of gravity, cleans through manhole door regularly.

The blender includes motor and the puddler rather than linking to each other, the output of puddler is connected with stirring paddle leaf, stirring paddle leaf includes horizontal pole and rather than the vertical decurrent output pole that links to each other, through the rotation of motor, the output pole can be rotatory along set direction, and the windward side and the leeward side of output pole can promote the flue gas that rises to make the mixing stirring between flue gas and the denitrifier wherein, as preferred embodiment, be equipped with water conservancy diversion recess 8 on the output pole, the water conservancy diversion recess sets up on the windward side of output pole, and it is the indent arcwall face, and it can lead the flue gas, so that the flue gas is blown to device main part inner wall, in order to utilize the denitrifier attached to device main part inner wall.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a flue gas denitrification facility for thermal power plant uses, a serial communication port, including device main part, blender and distributor, the device main part is cylindric or round platform form, and the upper and lower both ends of device main part are equipped with exhanst gas outlet and flue gas entry respectively, fixed position sets up the denitrifier injection assembly of at least two sets of injection denitrifier in the device main part, denitrifier injection assembly includes two at least injection pipes, and wherein, first injection pipe sprays with predetermineeing the angle, and the entry of distributor is assembled to the output of second injection pipe, evenly sprays through the distributor, the center department of device main part sets up the blender, the blender is used for mixing the flue gas and the denitrifier in the space.

2. The flue gas denitration device for the thermal power plant as claimed in claim 1, further comprising a magnetic suction type cleaning device, wherein the magnetic suction type cleaning device comprises a magnetic suction head arranged inside the device body and a magnet arranged outside the device body, the magnetic suction head and the magnet are magnetically connected, a scraping plate is attached to the outside of the suction head, and the radian of the scraping plate is the same as the radial radian of the same cross section of the device body.

3. The flue gas denitration device for the thermal power plant as claimed in claim 1, wherein said mixer is provided with a flow guide groove.