SCR (Selective Catalytic Reduction) denitration device with low flue gas emission

Abstract

The utility model relates to the technical field of SCR (Selective Catalytic Reduction) denitration devices, in particular to an SCR denitration device with low flue gas emission, which adopts the technical scheme that the SCR denitration device comprises a denitration tank, a first detection mechanism and a second detection mechanism, a spraying processor is fixedly arranged at the top of the denitration tank, and the bottom of the denitration tank is opened and is communicated with a bottom tank; the first detection mechanism is arranged on one side of the denitration tank; the second detection mechanism is arranged on the other side of the denitration tank. The denitration device solves the problem that in the prior art, catalyst waste is caused when denitration operation is carried out and the smoke inlet amount is small.

Description

Technical Field

[0001] The utility model relates to the technical field of SCR denitration devices, in particular to an SCR denitration device with low smoke emission. Background Art

[0002] The importance of removing nitrogen oxides from combustion flue gas and preventing environmental pollution has been sharply raised as a worldwide issue. The more mainstream processes in the world are divided into: SCR and SNCR. These two processes are not much different except that the reaction temperature of SCR is lower than that of SNCR due to the use of catalysts. At present, many manufacturers use ammonia denitrification devices to purify the exhaust gas before discharging it into the atmosphere. However, the current ammonia SCR denitrification device has a low exhaust gas purification efficiency and a large investment, and the degree of exhaust gas purification is low, so that the gas purified by the denitrification device will still pollute the atmosphere and the environment.

[0003] Chinese utility model patent: Publication number CN211462725U discloses an SCR denitration device for ammonia water, which relates to the technical field of SCR denitration devices. The SCR denitration device for ammonia water comprises a purification chamber, a denitration tower, an ammonia water evaporator and a lifting device. The denitration tower is fixedly installed on one side of the purification chamber, the ammonia water evaporator is fixedly installed on the other side of the purification chamber, the lifting device is fixedly installed on the side of the ammonia water evaporator away from the denitration tower, a groove is opened on one side of the outer surface of the denitration tower, a first telescopic plate is fixedly connected to the top of the groove, and a second telescopic plate is fixedly connected to the bottom of the groove.

[0004] In the existing technology, when CN211462725U is in use, on the one hand, the ammonia water is evaporated through the ammonia water evaporator, and then the evaporated disinfectant gas is transported into the delivery box through the delivery pipe, and then enters the denitrification tower through the connecting pipe to purify the exhaust gas in the denitrification tower. By setting the blower on one side of the delivery box, the disinfectant gas can be more efficiently transported into the denitrification tower; on the other hand, by setting the first telescopic plate, the second telescopic plate and the movable plate, the lifting device can drive the connecting pipe to move up and down, so that each position in the denitrification tower is purified by the disinfectant gas, so that the denitrification efficiency of the exhaust gas is higher.

[0005] However, when the flue gas to be denitrified is less, the existing denitrification equipment still performs full-power denitrification processing, which leads to a large consumption of catalyst during the denitrification operation, resulting in a large waste. Therefore, a low flue gas emission SCR denitrification device is needed to solve the above problem. Utility Model Content

[0006] The utility model aims to provide an SCR denitrification device with low flue gas emissions, which has the advantage of reducing the amount of catalyst used when the smoke intake is small, and solves the problem in the prior art that the device will cause waste of catalyst when performing denitrification operation and the smoke intake is small.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low flue gas emission SCR denitrification device, comprising a denitrification tank, a spray processor is fixedly installed on the top of the denitrification tank, the bottom of the denitrification tank is open and connected to a bottom tank, and also includes a first detection mechanism and a second detection mechanism;

[0008] The first detection mechanism is arranged on one side of the denitration tank;

[0009] The second detection mechanism is arranged on the other side of the denitrification tank.

[0010] When using a low flue gas emission SCR denitrification device in the present technical solution, the flue gas enters the first detection mechanism through the intake pipe, and the flue gas intake volume and the nitrogen oxide content are detected by the first detection mechanism. At this time, the data can be transmitted to the spray processor through the first connecting line, so that the spray mechanism is controlled by the spray processor to spray an appropriate amount of catalyst according to the flue gas intake volume and the nitrogen oxide content, and the catalyst can flow to the bottom tank after treating the flue gas during spraying, and can be recycled. After the flue gas treatment, the content of nitrogen oxides in the exhaust flue gas can be analyzed by the second detection mechanism, and the data can be transmitted to the spray processor through the second connecting line, so that the spraying amount of the spray mechanism catalyst can be adjusted according to actual needs, so as to maximize the denitrification operation under the premise of reducing the amount of catalyst used.

[0011] Preferably, the denitration tank adopts a convex-shaped structure design, and the inner wall of the denitration tank is coated with epoxy acrylate resin.

[0012] The denitrification tank is designed with a convex structure, which facilitates the installation of the first detection mechanism, the second detection mechanism and the spray processor. At the same time, the inner wall of the denitrification tank is coated with epoxy acrylate resin, which reduces the corrosion of the flue gas and catalyst to the denitrification tank, thereby increasing the service life of the denitrification tank.

[0013] Preferably, a spray mechanism is fixedly installed at the bottom of the spray processor, and the spray mechanism is embedded and installed above the middle section of the denitrification tank.

[0014] By fixing a spray mechanism at the bottom of the spray processor, the amount of catalyst sprayed by the spray mechanism can be controlled by the spray processor. At the same time, the spray mechanism is embedded and installed above the middle section of the denitrification tank, so that after the catalyst is fully contacted with the flue gas and the denitrification operation is performed, the excess catalyst and the waste catalyst can enter the bottom tank and be recycled.

[0015] Preferably, the bottom trough adopts a conical structure design, and a drainage pipe is installed at the bottom of the bottom trough.

[0016] The bottom tank is designed with a conical structure and a drain pipe is installed at the bottom of the bottom tank, so that during actual use, waste liquid in the bottom tank can be discharged through the drain pipe and recycled.

[0017] Preferably, the first detection mechanism is electrically connected to the spray processor via a first connecting line, and an air intake pipe is provided on a side of the first detection mechanism facing away from the denitrification tank.

[0018] By electrically connecting the first detection mechanism to the spray processor through a first connecting line, and providing an air intake pipe on the side of the first detection mechanism away from the denitrification tank, the flue gas can enter the first detection mechanism through the air intake pipe, and the flue gas intake volume and the nitrogen oxide content can be analyzed by the first detection mechanism.

[0019] Preferably, the second detection mechanism is electrically connected to the spray processor via a second connecting line, and an air outlet pipe is provided on a side of the second detection mechanism facing away from the denitrification tank.

[0020] By electrically connecting the second detection mechanism to the spray processor via a second connecting line, an exhaust pipe is provided on the side of the second detection mechanism away from the denitrification tank, so that the flue gas can be discharged through the exhaust pipe, and the content of nitrogen oxides in the flue gas can be analyzed by the second detection mechanism.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] The utility model sets a first detection mechanism and a second detection mechanism, and sets the first detection mechanism on one side of the denitrification tank, and sets the second detection mechanism on the other side of the denitrification tank. The flue gas enters the first detection mechanism through the air intake pipe, and the flue gas intake volume and the content of nitrogen oxides are detected by the first detection mechanism. At this time, the data can be transmitted to the spray processor through the first connecting line, so that the spray mechanism is controlled by the spray processor to spray an appropriate amount of catalyst according to the flue gas intake volume and the content of nitrogen oxides, and during the spraying, the catalyst can flow into the bottom tank after treating the flue gas, and can be recycled. After the flue gas is treated, the content of nitrogen oxides in the exhaust flue gas can be analyzed by the second detection mechanism, and the data is transmitted to the spray processor through the second connecting line, so that the spraying amount of the spray mechanism catalyst can be adjusted according to actual needs, so that the denitrification operation can be carried out to the greatest extent under the premise of reducing the amount of catalyst used, so as to achieve the effect of reducing the amount of catalyst used when the smoke intake is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the main structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 3 This is a front view structural schematic diagram of the utility model;

[0026] Figure 4 It is a left side structural schematic diagram of the utility model.

[0027] In the figure: 1. first detection mechanism; 2. first connecting line; 3. spray processor; 4. second connecting line; 5. second detection mechanism; 6. bottom tank; 7. denitrification tank; 8. spray mechanism. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the utility model is provided: a low flue gas emission SCR denitration device, comprising a denitration tank 7, a spray processor 3 is fixedly installed on the top of the denitration tank 7, the bottom of the denitration tank 7 is open and connected to a bottom tank 6, and further comprising a first detection mechanism 1 and a second detection mechanism 5;

[0031] Specifically, the first detection mechanism 1 is arranged on one side of the denitration tank 7;

[0032] The second detection mechanism 5 is disposed on the other side of the denitration tank 7 .

[0033] By setting the first detection mechanism 1 and the second detection mechanism 5, and arranging the first detection mechanism 1 on one side of the denitrification tank 7, and at the same time, arranging the second detection mechanism 5 on the other side of the denitrification tank 7, the flue gas enters the first detection mechanism 1 through the air intake pipe, and the flue gas intake volume and the nitrogen oxide content are detected by the first detection mechanism 1. At this time, the data can be transmitted to the spray processor 3 through the first connecting line 2, so that the spray mechanism 8 is controlled by the spray processor 3 to spray an appropriate amount of catalyst according to the flue gas intake volume and the nitrogen oxide content, and during the spraying, the catalyst can flow into the bottom tank 6 after treating the flue gas, and can be recycled. After the flue gas is treated, the content of nitrogen oxides in the exhaust flue gas can be analyzed by the second detection mechanism 5, and the data is transmitted to the spray processor 3 through the second connecting line 4, so that the spraying amount of the catalyst of the spray mechanism 8 can be adjusted according to actual needs, so that the denitrification operation can be carried out to the greatest extent under the premise of reducing the amount of catalyst used, so as to achieve the effect of reducing the amount of catalyst used when the flue gas intake is small.

[0034] Furthermore, the denitration tank 7 adopts a convex-shaped structure design, and the inner wall of the denitration tank 7 is coated with epoxy acrylate resin.

[0035] By adopting a convex-shaped structure design for the denitrification tank 7, the installation of the first detection mechanism 1, the second detection mechanism 5 and the spray processor 3 is facilitated. At the same time, the inner wall of the denitrification tank 7 is coated with epoxy acrylate resin, thereby reducing the corrosion of the denitrification tank 7 by flue gas and catalyst, thereby improving the service life of the denitrification tank 7.

[0036] Furthermore, a spray mechanism 8 is fixedly installed at the bottom of the spray processor 3 , and the spray mechanism 8 is embedded and installed above the middle section of the denitrification tank 7 .

[0037] By fixing the spray mechanism 8 at the bottom of the spray processor 3, the amount of catalyst sprayed by the spray mechanism 8 can be controlled by the spray processor 3. At the same time, the spray mechanism 8 is embedded and installed above the middle section of the denitrification tank 7, so that after the catalyst is fully contacted with the flue gas and the denitrification operation is performed, the excess catalyst and the waste catalyst can enter the bottom tank 6 and be recovered.

[0038] Furthermore, the bottom tank 6 adopts a conical structure design, and a drainage pipe is installed at the bottom of the bottom tank 6.

[0039] By adopting a conical structure design for the bottom tank 6 and installing a drain pipe at the bottom of the bottom tank 6, the waste liquid in the bottom tank 6 can be discharged through the drain pipe and recycled during actual use.

[0040] Furthermore, the first detection mechanism 1 is electrically connected to the spray processor 3 via a first connecting line 2 , and an air intake pipe is provided on a side of the first detection mechanism 1 facing away from the denitration tank 7 .

[0041] By electrically connecting the first detection mechanism 1 to the spray processor 3 through the first connecting line 2, and providing an air intake pipe on the side of the first detection mechanism 1 away from the denitrification tank 7, the flue gas can enter the first detection mechanism 1 through the air intake pipe, and the flue gas intake volume and the nitrogen oxide content can be analyzed by the first detection mechanism 1.

[0042] Furthermore, the second detection mechanism 5 is electrically connected to the spray processor 3 via a second connecting line 4 , and an air outlet pipe is provided on a side of the second detection mechanism 5 facing away from the denitration tank 7 .

[0043] By electrically connecting the second detection mechanism 5 to the spray processor 3 through the second connecting line 4, an exhaust pipe is provided on the side of the second detection mechanism 5 facing away from the denitrification tank 7, so that the flue gas can be discharged through the exhaust pipe, and the content of nitrogen oxides in the flue gas can be analyzed by the second detection mechanism 5.

[0044] When the utility model is used, the flue gas enters the first detection mechanism 1 through the air intake pipe, and the flue gas intake volume and the nitrogen oxide content are detected by the first detection mechanism 1. At this time, the data can be transmitted to the spray processor 3 through the first connecting line 2, so that the spray mechanism 8 is controlled by the spray processor 3 to spray an appropriate amount of catalyst according to the flue gas intake volume and the nitrogen oxide content, and the catalyst can flow to the bottom trough 6 after processing the flue gas during spraying, and can be recycled. After the flue gas is processed, the nitrogen oxide content in the exhaust flue gas can be analyzed by the second detection mechanism 5, and the data can be transmitted to the spray processor 3 through the second connecting line 4, so that the spraying amount of the catalyst of the spray mechanism 8 can be adjusted according to actual needs, so as to maximize the destocking operation under the premise of reducing the amount of catalyst used.

[0045] 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-limiting 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 are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A low flue gas emission SCR denitration device, comprising a denitration tank (7), a spray processor (3) fixedly installed on the top of the denitration tank (7), and a bottom opening of the denitration tank (7) connected to a bottom tank (6), characterized in that: Also includes: A first detection mechanism (1) is provided on one side of the denitration tank (7); The second detection mechanism (5) is arranged on the other side of the denitration tank (7).

2. The SCR denitration device with low flue gas emission according to claim 1, characterized in that: The denitration tank (7) adopts a convex-shaped structural design, and the inner wall of the denitration tank (7) is coated with epoxy acrylate resin.

3. The SCR denitration device with low flue gas emission according to claim 1, characterized in that: A spray mechanism (8) is fixedly installed at the bottom of the spray processor (3), and the spray mechanism (8) is embedded and installed above the middle section of the denitration tank (7).

4. The SCR denitration device with low flue gas emission according to claim 1, characterized in that: The bottom trough (6) is designed with a conical structure, and a drainage pipe is installed at the bottom of the bottom trough (6).

5. The SCR denitration device with low flue gas emission according to claim 1, characterized in that: The first detection mechanism (1) is electrically connected to the spray processor (3) via a first connecting line (2), and an air intake pipe is provided on a side of the first detection mechanism (1) facing away from the denitration tank (7).

6. The SCR denitration device with low flue gas emission according to claim 1, characterized in that: The second detection mechanism (5) is electrically connected to the spray processor (3) via a second connecting line (4), and an air outlet pipe is provided on a side of the second detection mechanism (5) facing away from the denitration tank (7).

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