Flue gas denitration treatment equipment

Abstract

The utility model discloses flue gas denitration treatment equipment which comprises a heat preservation box, a gas inlet pipe is connected to the heat preservation box, a flue gas filtering mechanism is horizontally installed on the gas inlet pipe, and the flue gas filtering mechanism comprises a filtering box, a guide plate, a filtering assembly and a collecting box; the filter box is connected with an inflow pipe and an outflow pipe, and the inflow pipe and the outflow pipe are connected with the air inlet pipe through flanges; the guide plate is arranged in the filter box and corresponds to the inflow pipe; the filtering assembly is installed in the filtering box, the filtering assembly comprises a fixing ring, the fixing ring is fixedly connected to the inner wall of the filtering box and arranged on the outer side of the outflow pipe, a rotating plate is clamped outside the fixing ring, and a filtering net frame is fixedly connected to the rotating plate. According to the device, impurities in flue gas can be filtered, the probability that the impurities in the flue gas adhere to metal pipes is effectively reduced, the normal heat exchange effect of liquid ammonia and high-heat flue gas can be guaranteed, and therefore the heat exchange efficiency of the whole device is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment, and in particular relates to a flue gas denitration treatment device. Background Art

[0002] During the combustion process, nitrogen and oxygen combine to form nitrogen oxides (NOx), which is a pollutant harmful to the atmospheric environment. It is highly irritating and toxic, causing environmental problems such as acid rain and photochemical smog, and also endangering human health. Therefore, in order to avoid NOx pollution of the environment, the flue gas after combustion should be denitrated.

[0003] Among them, flue gas denitrification refers to a technology for removing NOx from flue gas. Its main principle is to reduce NOx into nitrogen and water by adding appropriate reducing agents or catalysts during the combustion process or in the flue gas treatment system, thereby achieving the purpose of reducing NOx emissions. The application of flue gas denitrification technology can effectively reduce atmospheric pollutant emissions and protect the environment and human health.

[0004] There are many flue gas denitrification devices on the market, such as the Chinese utility model patent with publication number: CN218653869U, which discloses a denitrification device for flue gas treatment, which includes an ammonia storage tank and an SCR reactor. An insulation box is fixedly installed on the circumferential outer wall of the ammonia storage tank, and a sealed box cover is fixedly installed at the open position of the insulation box. A metal pipe is fixedly installed between the insulation box and the box cover, and a drainage component connected to the SCR reactor is fixedly installed on the bottom end of the metal pipe. A U-shaped air intake pipe is fixedly installed on the top of the SCR reactor, and an air inlet is arranged on the top of the insulation box, which can solve the problem that the heat carried by the flue gas cannot be utilized, resulting in a waste of resources.

[0005] However, when the device is in use, no smoke filtering mechanism is provided, which causes impurities contained in the smoke to easily enter the interior of the insulation box and adhere to the metal tube. Over time, a thick impurity layer will form on the side wall of the metal tube. If not handled in time, it will affect the heat exchange effect between liquid ammonia and high-calorie smoke, and further affect the heat exchange efficiency of the entire device.

[0006] Therefore, in view of the above technical problems, it is necessary to provide a flue gas denitrification treatment equipment.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0008] The utility model aims to provide a flue gas denitration treatment device, which can solve the problem that impurities in the flue gas affect heat exchange.

[0009] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0010] A flue gas denitration treatment device comprises an insulation box, an air intake pipe is connected to the insulation box, a flue gas filter mechanism is horizontally installed on the air intake pipe, and the flue gas filter mechanism comprises: a filter box, a guide plate, a filter assembly and a collection box;

[0011] The filter box is connected with an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are both connected to the air inlet pipe through flanges;

[0012] The guide plate is arranged in the filter box and corresponds to the inflow pipe;

[0013] The filter assembly is installed in the filter box, and the filter assembly includes a fixing ring, which is fixedly connected to the inner wall of the filter box and is arranged on the outside of the outflow pipe. A rotating plate is engaged with the outside of the fixing ring, and a filter rack is fixedly connected to the rotating plate. The end of the filter rack away from the fixing ring is connected to a bottom plate, and a support rod is fixedly connected to the center of the bottom plate. A first bearing is provided on the outer wall of the support rod, and a plurality of first reinforcing rods are connected between the first bearing and the inner wall of the filter box;

[0014] The collecting box is installed on the lower side of the filter box and is communicated with the inside of the filter box.

[0015] In one or more embodiments of the present invention, a vent pipe is installed on the top of the filter box, and the interior of the filter box is connected to the outside through the vent pipe. When the filter frame is cleaned, the gas in the filter box is easily discharged, so that the gas pressure in the filter box is not easy to be too high.

[0016] In one or more embodiments of the present invention, one end of the air vent pipe located in the filter box is connected to a filter screen, so that when cleaning the filter screen frame, impurities in the filter box are not easily discharged through the air vent pipe, thereby reducing the probability of impurities polluting the environment.

[0017] In one or more embodiments of the present invention, the rotating plate is rotatably connected to the fixed ring, and the support rod is rotatably connected to the first bearing, so as to facilitate the rotation of the filter frame and further facilitate 360° sweeping of the side wall of the filter frame.

[0018] In one or more embodiments of the present invention, a cover door is hingedly connected to the collection box to facilitate taking out the impurities collected in the collection box so as to centrally process the impurities.

[0019] In one or more embodiments of the present invention, one end of the support rod away from the bottom plate is connected to a first bevel gear.

[0020] In one or more embodiments of the present invention, a motor is installed on the outer top wall of the filter box, and the motor output shaft is connected to a second bevel gear, which is meshed with the first bevel gear. When the motor is running, the motor can drive the second bevel gear to rotate. Since the second bevel gear is meshed with the first bevel gear, the second bevel gear can drive the first bevel gear to rotate, and then drive the filter frame to rotate, so that impurities on the surface of the filter frame are subjected to rotational centrifugal force, which is used to remove impurities on the surface of the filter frame.

[0021] In one or more embodiments of the present invention, the side wall of the motor output shaft is connected to the second bearing, and a plurality of second reinforcing rods are connected between the second bearing and the inner wall of the filter box for stabilizing the motor output shaft.

[0022] In one or more embodiments of the utility model, a blowing pipe is fixedly connected to the outflow pipe, and gas can be injected into the filter frame through the blowing pipe, and impurities on the surface of the filter frame can be blown away by the gas, and the impurities are separated from the filter frame by the rotation of the filter frame, so that the filter frame can be cleaned;

[0023] The side wall of one end of the blow pipe located in the filter rack is provided with a plurality of through holes evenly distributed around the circumference for facilitating the exhaust of gas. A control valve is installed on the blow pipe for controlling the on and off of the blow pipe, that is, when the filter rack filters impurities in the flue gas, the blow pipe is in a closed state; when the filter rack needs to be cleaned, the control valve on the blow pipe is opened and the blow pipe is connected to an external gas source.

[0024] In one or more embodiments of the present invention, a guide plate is provided on the inner bottom wall of the filter box, the guide plate is provided on the lower side of the filter frame, and the guide plate corresponds to the collecting box, and the guide plate is used to guide the discharge of impurities so that the impurities can be collected in the collecting box.

[0025] Compared with the prior art, the flue gas denitrification treatment equipment of the utility model can filter impurities in the flue gas, effectively reducing the probability of impurities in the flue gas adhering to the metal tube, thereby ensuring the normal heat exchange effect between liquid ammonia and high-calorie flue gas, thereby ensuring the heat exchange efficiency of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a cross-sectional view of a flue gas denitration treatment device in one embodiment of the utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0029] Figure 3 for Figure 1 Schematic diagram of the structure at B in the middle;

[0030] Figure 4 It is a three-dimensional diagram of a flue gas denitrification treatment device in one embodiment of the utility model.

[0031] Description of main reference numerals:

[0032] 1-filter box, 101-inflow pipe, 102-outflow pipe, 103-vent pipe, 2-guide plate, 3-filter assembly, 301-fixed ring, 302-rotating plate, 303-filter grid frame, 304-bottom plate, 305-support rod, 306-first bearing, 307-first bevel gear, 308-motor, 309-second bevel gear, 4-collection box, 401-cover door, 5-blow pipe, 6-guide plate. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] like Figures 1 to 4 As shown, a flue gas denitrification treatment device in one embodiment of the utility model includes an insulation box, an air intake pipe is connected to the insulation box, a flue gas filtering mechanism is horizontally installed on the air intake pipe, and the flue gas filtering mechanism includes: a filter box 1, a guide plate 2, a filter assembly 3 and a collection box 4.

[0035] The filter box 1 is connected with an inlet pipe 101 and an outlet pipe 102 , and both the inlet pipe 101 and the outlet pipe 102 are connected to the air inlet pipe via flanges, so that the filter box 1 can be disassembled as a whole easily.

[0036] Preferably, both the inflow pipe 101 and the outflow pipe 102 are provided with a first switch valve for controlling the opening and closing of the inflow pipe 101 and the outflow pipe 102 .

[0037] In addition, a gas relief pipe 103 is installed on the top of the filter box 1, and the inside of the filter box 1 is connected to the outside through the gas relief pipe 103. When the outside gas enters the filter frame 303 through the blowing pipe 5, the filter frame 303 can be purged by the outside gas, and the cleaned gas can be discharged through the gas relief pipe 103, so that the gas pressure in the filter box 1 is not easy to be too high.

[0038] Specifically, one end of the vent pipe 103 located in the filter box 1 is connected to a filter screen. When the vent pipe 103 discharges gas, impurities in the filter box 1 are not easily discharged through the vent pipe 103, thereby reducing the probability of impurities polluting the environment.

[0039] Preferably, a second switch valve is installed on the air release pipe 103 to control the on-off of the air release pipe 103 .

[0040] In addition, an observation plate is provided on the side wall of the filter box 1 , and the observation plate corresponds to the filter frame 303 , so as to facilitate observation of the blockage of the filter frame 303 .

[0041] like Figures 1 to 4 As shown, the guide plate 2 is arranged in the filter box 1 and corresponds to the inlet pipe 101. The guide plate 2 is used to guide the flow of smoke entering the filter box 1, and is also used to preliminarily remove impurities in the smoke, that is, the impurities will hit the guide plate 2 along with the smoke, and move along the guide plate 2 and gather in the collection box 4.

[0042] like Figures 1 to 4 As shown, the filter assembly 3 is installed in the filter box 1. The filter assembly 3 is used to filter impurities in the flue gas, so that the impurities in the flue gas are not easy to enter the insulation box, thereby reducing the probability of impurities in the flue gas adhering to the metal pipe, ensuring the normal heat exchange effect between liquid ammonia and high-calorie flue gas, thereby ensuring the heat exchange efficiency of the overall device.

[0043] The filter assembly 3 includes a fixing ring 301, which is fixedly connected to the inner wall of the filter box 1 and arranged outside the outflow pipe 102. The fixing ring 301 is used to install the rotating plate 302.

[0044] In addition, a rotating plate 302 is engaged with the outside of the fixed ring 301, and a filter rack 303 is fixedly connected to the rotating plate 302. The end of the filter rack 303 away from the fixed ring 301 is connected to the bottom plate 304. The rotating plate 302, the filter rack 303 and the bottom plate 304 form a whole. The filter rack 303 can filter impurities in the smoke, and the rotating plate 302 and the bottom plate 304 are used to fix the filter rack 303.

[0045] Specifically, a support rod 305 is fixedly connected at the center of the bottom plate 304, a first bearing 306 is provided on the outer wall of the support rod 305, and a plurality of first reinforcing rods are connected between the first bearing 306 and the inner wall of the filter box 1. The filter rack 303 is fixed by the cooperation of the rotating plate 302, the support rod 305, the first bearing 306 and the plurality of first reinforcing rods, so that the filter rack 303 can be stably installed in the filter box 1, and then the filter rack 303 can be used to filter impurities in the smoke.

[0046] Preferably, the rotating plate 302 is rotatably connected to the fixing ring 301 , and the support rod 305 is rotatably connected to the first bearing 306 , so as to facilitate the rotation of the filter frame 303 and further facilitate 360° sweeping of the side wall of the filter frame 303 .

[0047] like Figures 1 to 4 As shown, one end of the support rod 305 away from the bottom plate 304 is connected to the first bevel gear 307. A motor 308 is installed on the outer top wall of the filter box 1, and the output shaft of the motor 308 is connected to the second bevel gear 309, which is meshed with the first bevel gear 307.

[0048] When the motor 308 is running, the motor 308 can drive the second bevel gear 309 to rotate. Since the second bevel gear 309 is meshed with the first bevel gear 307, the second bevel gear 309 can drive the first bevel gear 307 to rotate, and then drive the filter frame 303 to rotate, so that impurities on the surface of the filter frame 303 are subjected to the rotating centrifugal force, which is used to remove impurities on the surface of the filter frame 303.

[0049] The side wall of the output shaft of the motor 308 is connected to the second bearing, and a plurality of second reinforcing rods are connected between the second bearing and the inner wall of the filter box 1 to stabilize the output shaft of the motor 308 .

[0050] In addition, in order to reduce the influence of impurities in the flue gas on the first bevel gear 307 and the second bevel gear 309 , a protective shell may be installed on the outer sides of the first bevel gear 307 and the second bevel gear 309 .

[0051] like Figures 1 to 4 As shown, the collecting box 4 is installed at the lower side of the filter box 1 and is connected to the inside of the filter box 1. The collecting box 4 is used to collect impurities in the filtered flue gas.

[0052] The collecting box 4 is hinged with a cover door 401 , and opening the cover door 401 facilitates taking out the impurities collected in the collecting box 4 so as to centrally process the impurities.

[0053] like Figures 1 to 4As shown, a blowing pipe 5 is fixedly connected to the outflow pipe 102, and gas can be injected into the filter frame 303 through the blowing pipe 5. The gas can be used to blow away impurities on the surface of the filter frame 303, and the rotation of the filter frame 303 can separate the impurities from the filter frame 303, thereby cleaning the filter frame 303.

[0054] Among them, the side wall of one end of the blowing pipe 5 located in the filter frame 303 is provided with a plurality of through holes evenly distributed around the circumference to facilitate the discharge of gas.

[0055] In addition, a control valve is installed on the blow pipe 5 to control the on and off of the blow pipe 5, that is, when the filter rack 303 filters impurities in the flue gas, the blow pipe 5 is in a closed state. When the filter rack 303 needs to be cleaned, the control valve on the blow pipe 5 is opened and the blow pipe 5 is connected to an external gas source.

[0056] like Figures 1 to 4 As shown, the inner bottom wall of the filter box 1 is provided with a guide plate 6, which is arranged at the lower side of the filter frame 303, and the guide plate 6 corresponds to the collection box 4. The guide plate 6 is used to guide the impurities to be discharged so that the impurities can be collected in the collection box 4.

[0057] During specific use, the filter box 1 is connected to the air inlet pipe of the insulation box through a flange, and the flue gas flowing in the air inlet pipe enters the filter box 1 through the inlet pipe 101 for filtration. The filtered flue gas is then discharged through the outlet pipe 102 and enters the insulation box for heat exchange.

[0058] Among them, when the smoke enters the filter box 1, it first contacts the guide plate 2. The guide plate 2 can not only guide the flow of the smoke, but also make the impurities in the smoke collide with the guide plate 2. After the collision, the impurities will fall into the collection box 4 along the guide plate 2, and then the smoke can be preliminarily filtered.

[0059] The smoke continues to flow, and after being filtered again by the filter rack 303, it enters the outflow pipe 102 and then enters the heat preservation box for heat exchange.

[0060] The staff can observe the blockage of the filter rack 303 through the observation plate on the filter box 1. If the blockage is serious, it needs to be cleaned in time. When cleaning the filter rack 303, stop injecting smoke, connect the injection pipe 5 to an external gas source, close the first switch valve of the inflow pipe 101 and the outflow pipe 102, open the second switch valve on the exhaust pipe 103 and the control valve on the injection pipe 5, and run the motor 308 at the same time. The motor 308 can drive the second bevel gear 309 to rotate. Since the second bevel gear 309 is meshed with the first bevel gear 307, the second bevel gear 309 can drive the first bevel gear 307 to rotate, and then drive the filter rack 303 to rotate, so that the impurities on the surface of the filter rack 303 are subjected to the rotating centrifugal force, which is used to remove the impurities on the surface of the filter rack 303.

[0061] In addition, an external gas source delivers gas to the filter frame 303 through the blowing pipe 5, and the gas will blow toward the rotating filter frame 303. Under the action of the gas and the rotation, the impurities on the surface of the filter frame 303 are better separated from the filter frame 303, and the gas can be discharged through the vent pipe 103, while the impurities can move along the guide plate 2 and the guide plate 6 and fall into the collection box 4.

[0062] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flue gas denitration treatment device, comprising an insulation box, an air intake pipe is connected to the insulation box, and a flue gas filtering mechanism is horizontally installed on the air intake pipe, characterized in that: The smoke filtering mechanism comprises: A filter box, the filter box is connected with an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are both connected to the air inlet pipe through flanges; A guide plate, disposed in the filter box and corresponding to the inlet pipe; A filter assembly is installed in the filter box, the filter assembly includes a fixing ring, the fixing ring is fixedly connected to the inner wall of the filter box and is arranged on the outside of the outflow pipe, a rotating plate is engaged with the outside of the fixing ring, a filter rack is fixedly connected to the rotating plate, the filter rack is connected to a bottom plate at one end away from the fixing ring, a support rod is fixedly connected to the center of the bottom plate, a first bearing is provided on the outer wall of the support rod, and a plurality of first reinforcing rods are connected between the first bearing and the inner wall of the filter box; The collecting box is installed at the lower side of the filter box and is communicated with the inside of the filter box.

2. A flue gas denitration treatment equipment according to claim 1, characterized in that: An air leakage pipe is installed on the top of the filter box, and the interior of the filter box is connected with the outside through the air leakage pipe.

3. A flue gas denitration treatment equipment according to claim 2, characterized in that: One end of the air leakage pipe located in the filter box is connected with a filter screen.

4. The flue gas denitrification treatment equipment according to claim 1, characterized in that: The rotating plate is rotatably connected to the fixing ring, and the supporting rod is rotatably connected to the first bearing.

5. The flue gas denitration treatment equipment according to claim 1, characterized in that: The collecting box is hingedly connected with a cover door.

6. A flue gas denitration treatment equipment according to claim 1, 3, 4 or 5, characterized in that: One end of the support rod away from the bottom plate is connected with a first bevel gear.

7. The flue gas denitration treatment equipment according to claim 6, characterized in that: A motor is installed on the outer top wall of the filter box, and the output shaft of the motor is connected to a second helical gear, which is meshed with the first helical gear.

8. The flue gas denitration treatment equipment according to claim 7, characterized in that: The side wall of the motor output shaft is connected to the second bearing, and a plurality of second reinforcing rods are connected between the second bearing and the inner wall of the filter box.

9. The flue gas denitration treatment equipment according to claim 8, characterized in that: The outflow pipe is fixedly connected with a blowing pipe, a side wall of one end of the blowing pipe located in the filter frame is provided with a plurality of through holes evenly distributed around the circumference, and a control valve is installed on the blowing pipe.

10. The flue gas denitration treatment equipment according to claim 9, characterized in that: A guide plate is provided on the inner bottom wall of the filter box, the guide plate is arranged on the lower side of the filter frame, and the guide plate corresponds to the collection box.

Images