SCR (Selective Catalytic Reduction) denitration ash remover valve group

Abstract

The utility model discloses an SCR (Selective Catalytic Reduction) denitration deashing device valve group, which belongs to the technical field of denitration and comprises a Y-shaped main pipeline, an auxiliary pipeline I and a pair of auxiliary pipelines II, wherein at least one manual butterfly valve is arranged on the vertical section of the Y-shaped main pipeline, and at least one pneumatic butterfly valve is arranged on each of the inclined sections, connected with the vertical section, of the two sides of the Y-shaped main pipeline; one end of the auxiliary pipeline I is communicated with the Y-shaped main pipeline, and at least one manual valve and a pressure reducing valve are arranged on the auxiliary pipeline I; one ends of the pair of auxiliary pipelines II are respectively communicated with the inclined sections on the two sides of the Y-shaped main pipeline, and the other ends of the auxiliary pipelines II are mutually communicated with the other ends of the auxiliary pipelines I; a one-way valve is arranged on each of the pair of auxiliary pipelines II; according to the design, fine control and efficient management of the ash removal process of the SCR denitration system can be achieved through optimized pipeline layout and valve configuration.

Description

Technical Field

[0001] This utility model belongs to the field of denitrification technology, and in particular relates to a valve group for an SCR denitrification soot remover. Background Technology

[0002] With increasingly stringent environmental protection requirements, nitrogen oxide emission reduction in cement clinker production lines has become a key focus for the industry. Selective catalytic reduction (SCR) denitrification technology, due to its high denitrification efficiency, is widely used in the cement industry.

[0003] However, traditional SCR denitrification systems often have some problems, such as:

[0004] I. Traditional SCR denitrification systems often require a lot of on-site welding work during installation and maintenance. This not only increases the difficulty and time cost of construction, but also easily leads to a lot of cleaning work later due to the welding slag. The residue of welding slag not only affects the normal operation of the equipment, but may also have an adverse effect on the activity and life of the catalyst.

[0005] Second, the existing system has insufficient stability during operation. For example, the flue gas from the cement clinker production line has characteristics such as high dust concentration, small particle size, and high calcium content. These characteristics can easily lead to catalyst blockage, which in turn affects the denitrification efficiency and system stability. In addition, an unreasonable design of the dust removal device can also exacerbate the catalyst blockage problem and further reduce the system's operating efficiency.

[0006] To address the shortcomings of existing technologies, this utility model provides a valve assembly for an SCR denitrification soot remover, aiming to solve the aforementioned problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an SCR denitrification soot remover valve group that can reduce the amount of on-site welding work and the large amount of cleaning work caused by welding slag in the later stage through optimized pipeline layout and valve configuration, thereby increasing the stability of the equipment during operation.

[0008] To achieve the above objectives, this utility model employs the following technical solution:

[0009] A valve assembly for an SCR denitrification soot removal system includes:

[0010] The “Y”-shaped main pipeline has at least one manual butterfly valve on the vertical section of the pipeline and at least one pneumatic butterfly valve on each of the inclined sections on both sides of the “Y”-shaped main pipeline connected to the vertical section of the pipeline.

[0011] Auxiliary pipe one, one end of which is connected to the "Y"-shaped main pipe, and at least one pressure reducing valve is provided on the auxiliary pipe one;

[0012] And a pair of auxiliary pipes II; one end of the pair of auxiliary pipes II is connected to the inclined sections of the pipes on both sides of the “Y”-shaped main pipe, and the other end is connected to the other end of the auxiliary pipe I; and each pair of auxiliary pipes II is provided with a one-way valve.

[0013] To increase operational flexibility and facilitate manual adjustment of pressure or flow in the pipeline when needed, in this embodiment, at least one manual valve is also provided on the auxiliary pipeline.

[0014] In order to facilitate real-time monitoring of the pressure in the pipeline, timely detection of pressure anomalies, and convenient maintenance and adjustment, in this embodiment, a field pressure gauge is also provided on each of the two auxiliary pipelines.

[0015] Preferably, the size of the "Y"-shaped main pipe is DN200.

[0016] Preferably, the dimensions of the first auxiliary pipe and the pair of second auxiliary pipes are DN80.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0018] 1. This utility model achieves precise control and efficient management of the cleaning process in an SCR denitrification system through optimized pipeline layout and valve configuration. First, the combined use of manual and pneumatic butterfly valves ensures both operational flexibility and meets the requirements of automated control. Second, the pressure reducing valve effectively lowers system pressure, protecting equipment safety, while the check valve prevents gas backflow, ensuring the unidirectionality and purity of the process. Finally, the addition of a field pressure gauge facilitates real-time monitoring of pipeline pressure and timely adjustment of operating strategies. Therefore, the overall design not only improves cleaning efficiency and reduces energy consumption but also enhances system stability and safety, significantly benefiting the improvement of the SCR denitrification system's operational performance and maintenance convenience. Attached Figure Description

[0019] Figure 1 This is a front view of the present invention.

[0020] Figure 2 This is a structural schematic diagram from another perspective of this utility model.

[0021] Figure 3 This is a schematic diagram of the gas flow direction illustrating the working principle of this utility model.

[0022] in:

[0023] 1. Y-shaped main pipeline; 11. Vertical section pipeline; 12. Inclined section pipeline; 2. Auxiliary pipeline one; 3. Auxiliary pipeline two; 4. Manual butterfly valve; 5. Pneumatic butterfly valve; 6. Manual valve; 7. Pressure reducing valve; 8. Check valve; 9. Field pressure gauge. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0025] In the description of this utility model, it should be understood that the terms "middle," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] refer to Figures 1-3 This embodiment provides a valve assembly for an SCR denitrification soot removal system, comprising:

[0029] The “Y”-shaped main pipe 1 has at least one manual butterfly valve 4 on the vertical section 11 of the “Y”-shaped main pipe 1, and at least one pneumatic butterfly valve 5 on each of the inclined sections on both sides of the “Y”-shaped main pipe 1 connected to the vertical section 11.

[0030] Auxiliary pipe 2, one end of which is connected to the "Y"-shaped main pipe 1, and at least one pressure reducing valve 7 is provided on the auxiliary pipe 2;

[0031] And a pair of auxiliary pipes 2 3; one end of the pair of auxiliary pipes 2 3 is connected to the inclined section pipes 12 on both sides of the "Y"-shaped main pipe 1, and the other end is connected to the other end of the auxiliary pipe 1 2; and each pair of auxiliary pipes 2 3 is provided with a one-way valve 8.

[0032] Furthermore, at least one manual valve 6 is provided on the auxiliary pipe 2.

[0033] Furthermore, each of the two auxiliary pipelines 3 is equipped with a field pressure gauge 9.

[0034] Furthermore, the Y-shaped main pipe 1 has a size of DN200.

[0035] Furthermore, the auxiliary pipe 2 and the pair of auxiliary pipes 3 are DN80 in size.

[0036] Working principle: (Reference) Figure 3 In use, the gas enters from below the vertical section 11 of the "Y"-shaped main pipe 1, and then passes through the left and right inclined sections 12; wherein,

[0037] The pneumatic butterfly valves 5 of the left and right inclined pipe sections 12 are used to control the airflow into the material rake of the left inclined pipe section 12 or into the material rake of the right inclined pipe section 12; the airflow controls the next process ash remover (the ash remover cleans the floating dust on the surface of the catalyst).

[0038] The middle pipe is used to reduce the gas pressure in the main pipe through the pressure reducing valve 7, and then control the airflow direction through the one-way valve 8. For example, if the pneumatic butterfly valve 5 on the left inclined pipe of the "Y"-shaped main pipe 1 is opened, the one-way valve 8 on the left will automatically close. If the pneumatic butterfly valve 5 on the left is closed, the airflow through the one-way valve 8 on the left will allow the low-pressure and low-flow gas in the next process ash cleaner to form a slight positive pressure on the ash cleaner's rake, which will not cause the ash cleaner's rake to become blocked.

[0039] It should be noted that the modular design of the soot remover valve group in this utility model forms valve group modules with different pipe diameters, which are prefabricated in the factory to form a product, reducing on-site workload and improving the aesthetics of the equipment.

[0040] In summary, this utility model adds a pressure reducing valve 7 to the "Y"-shaped main pipeline 1 of the main air source, and then forms a low-pressure sealing air source for the soot cleaner through a one-way valve 8. This optimizes the original sealing fan and outlet valve, reduces equipment costs, and forms an integral whole with the valve group, thereby making the equipment integrated and modular.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A valve assembly for an SCR denitrification soot removal system, characterized in that, include: The "Y"-shaped main pipe (1) has at least one manual butterfly valve (4) on the vertical section pipe (11) of the "Y"-shaped main pipe (1) and at least one pneumatic butterfly valve (5) on each of the inclined sections pipe (12) on both sides of the "Y"-shaped main pipe (1) connected to the vertical section pipe (11). Auxiliary pipe 1 (2), one end of which is connected to the "Y"-shaped main pipe (1), and at least one pressure reducing valve (7) is provided on the auxiliary pipe 1 (2); And a pair of auxiliary pipes (3); one end of the pair of auxiliary pipes (3) is connected to the inclined section pipes (12) on both sides of the "Y"-shaped main pipe (1), and the other end is connected to the other end of the auxiliary pipe (2); and each pair of auxiliary pipes (3) is provided with a one-way valve (8).

2. The SCR denitrification soot removal valve assembly according to claim 1, characterized in that, At least one manual valve (6) is also provided on the auxiliary pipeline (2).

3. The SCR denitrification soot removal valve assembly according to claim 1, characterized in that, Each of the two auxiliary pipelines (3) is also equipped with a field pressure gauge (9).

4. The SCR denitrification soot removal valve assembly according to claim 1, characterized in that, The Y-shaped main pipe (1) has a size of DN200.

5. The SCR denitrification soot removal valve assembly according to claim 1, characterized in that, The auxiliary pipe one (2) and a pair of auxiliary pipes two (3) are DN80 in size.

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