CN217988928U - SCR denitration spray gun system and SCR denitration system - Google Patents

Abstract

The utility model discloses an SCR denitrification spray gun system and an SCR denitrification system. The SCR denitrification spray gun system includes a plurality of spray guns, one end of the spray gun is suitable for extending into the flue, and the plurality of spray guns are arranged at intervals. The plurality of spray guns are divided into multiple Injection area, a plurality of injection areas are arranged at intervals along the circumference of the flue. The SCR denitrification spray gun system of the utility model can make the urea evenly distributed in the flue and improve the pyrolysis efficiency.

Description

SCR denitration spray gun system and SCR denitration system

technical field

The utility model relates to the technical field of pyrolysis equipment, in particular to an SCR denitration spray gun system and an SCR denitration system.

Background technique

The urea direct injection pyrolysis technology is to atomize the urea solution and spray it into the SCR inlet flue, and use the heat of the high-temperature flue gas in the SCR inlet flue to pyrolyze the urea solution into the reducing agent required for SCR denitrification. The urea pyrolysis spray gun is a key component for spraying urea solution into the inlet flue. The arrangement of the spray gun will affect the distribution of urea in the flue and reduce the pyrolysis efficiency.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the embodiment of the present invention proposes an SCR denitration spray gun system, which can evenly distribute urea in the flue and improve pyrolysis efficiency.

The embodiment of the utility model also proposes an SCR denitrification system.

The SCR denitrification spray gun system of the embodiment of the present invention includes: a plurality of spray guns, one end of the spray gun is suitable for extending into the flue, and the plurality of spray guns are arranged at intervals, and the plurality of spray guns are divided into a plurality of spray areas, and the plurality of spray guns are divided into a plurality of spray areas. The injection areas are arranged at intervals along the circumference of the flue.

The SCR denitrification spray gun system of the embodiment of the utility model can make the urea evenly distributed in the flue and improve the pyrolysis efficiency.

In some embodiments, multiple injection zones are located on the same section of the flue.

In some embodiments, a plurality of the spray guns in the spray area are arranged in a matrix or arranged at intervals along the circumference of the flue, and the arrangement of the spray guns in the multiple spray areas is the same .

In some embodiments, the areas of the plurality of injection regions on the cross-section of the flue are the same.

In some embodiments, the number of spray guns in multiple spray zones is the same,

In some embodiments, the number of spray guns is A, and 4≤A≤16.

In some embodiments, the number of injection zones is 2-4.

In some embodiments, the SCR denitration spray gun system further includes a plurality of first regulating valves, and the plurality of regulating valves correspond to the plurality of injection zones one by one.

In some embodiments, the SCR denitration spray gun system further includes a plurality of second regulating valves, and the plurality of second regulating valves correspond to the plurality of spray guns respectively.

The SCR denitration system according to the embodiment of the present invention includes the SCR denitration spray gun system described in any one of the above embodiments.

Description of drawings

Fig. 1 is a schematic structural view of the SCR denitration spray gun system of the embodiment of the present invention.

Fig. 2 is a schematic structural view of an SCR denitration spray gun system according to another embodiment of the present invention.

Reference signs:

First division 1, second division 2, third division 3, fourth division 4, spray gun 5.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The SCR denitrification spray gun system of the embodiment of the present invention includes a plurality of spray guns 5, one end of the spray gun 5 is suitable for extending into the flue, and the plurality of spray guns 5 are arranged at intervals. The circumferential interval of the flue is arranged.

For example, the outlet of the spray gun 5 protrudes into the flue, and a plurality of injection areas are sequentially arranged along the circumference of the flue, and the injection area surrounded by the plurality of injection areas covers the cross section of the flue.

It should be noted that the amount of urea solution sprayed by multiple injection areas can be the same or different, that is, multiple injection areas can adjust the injection volume of urea solution in different injection areas according to the distribution of flue gas in the flue, for example, as shown in Figure 1, When the flue gas flow rate of the first zone 1 is relatively large, the injection volume of the urea solution of the first zone 1 can be relatively large.

The SCR denitrification spray gun system of the embodiment of the utility model can adjust the urea injection volume of different injection areas according to the distribution of flue gas in the flue by setting multiple injection areas, and by setting multiple injection areas, the urea can be evenly distributed in the In the flue, improve the pyrolysis efficiency.

In some embodiments, multiple injection zones are located on the same section of the flue.

It should be noted that the plurality of injection areas are connected end to end along the circumference of the flue, and the area of the injection area surrounded by the plurality of injection areas is the same as the cross-sectional area of the flue, and the flow rate of the smoke in the plurality of injection areas is the same or Close, so that the distribution of urea solution in the flue is even.

For example, there can be multiple large injection areas surrounded by multiple injection areas, and the multiple large injection areas are arranged at intervals in the extension direction of the flue, and the number of injection areas in each large injection area can be the same or different. The number of spray guns 5 of the zones can be the same or different.

In some embodiments, the multiple spray guns 5 in the injection area are arranged in a matrix or at intervals along the circumference of the flue, and the arrangement of the multiple spray guns 5 in the multiple injection areas is the same.

Specifically, as shown in FIG. 1 , a plurality of spray guns 5 are evenly spaced in the injection area, and the plurality of spray guns 5 are distributed in a matrix. As shown in FIG. 2 , the plurality of spray guns 5 are distributed in a circle.

In some embodiments, the areas of the plurality of injection zones on the cross-section of the flue are the same.

Specifically, as shown in Figures 1 and 2, the number of injection zones is four, and the four injection zones are distributed as the first subregion 1, the second subregion 2, the third subregion 3 and the fourth subregion 4, and the four injection regions The area is the same, and the sum of the areas of the four injection areas is the same as the area of the flue section. The areas of the multiple injection areas are the same, which can ensure the uniform distribution of urea in the flue and improve the pyrolysis efficiency of urea.

In some embodiments, the number of spray guns 5 in multiple spray zones is the same.

Specifically, as shown in Figure 1 and Figure 2, the number of spray guns 5 in each injection area is the same, and the same spray gun 5 can ensure that the amount of urea solution injected in each injection area is the same, or the number of spray guns 5 in each injection area Different, the number of spray guns 5 in each injection area can be adjusted according to the distribution of smoke in the flue, the number of spray guns 5 is A, and 4≤A≤16, for example, A can be 4, 6, 8 , 12, 16.

In some embodiments, the number of injection zones is 2-4.

For example, as shown in Figure 1, the number of injection zones is 4, and the 4 injection zones are distributed as the first division 1, the second division 2, the third division 3 and the fourth division 4, or the number of injection zones is 3 The three injection areas are distributed as the first partition 1, the second partition 2 and the third partition 3. The number of injection areas is related to the shape and size of the flue, that is, when the size of the flue is small, the number of injection areas is relatively small. Conversely, when the size of the flue is larger, the number of injection zones is larger.

The SCR denitrification spray gun system of the embodiment of the utility model is suitable for flues of different sizes and shapes by adjusting the number of injection areas.

In some embodiments, the SCR denitration spray gun system further includes a plurality of first regulating valves (not shown), and the plurality of regulating valves correspond to the plurality of injection zones one by one.

For example, the first regulating valve is an automatic regulating valve, the number of the first regulating valve is the same as the number of the spraying areas, and a plurality of first regulating valves correspond to a plurality of spraying areas one by one, and the first regulating valve can adjust the amount of water entering the spraying areas. total urea solution.

In some embodiments, the SCR denitration spray gun system further includes a plurality of second regulating valves (not shown), and the plurality of second regulating valves correspond to the plurality of spray guns 5 respectively.

For example, the second regulating valve can be a manual regulating valve or an automatic regulating valve, a plurality of second regulating valves are respectively connected with the first regulating valve, the number of the second regulating valves is the same as that of the spray gun 5, and the plurality of second regulating valves It is connected to a plurality of spray guns 5 in one-to-one correspondence, and the injection quantity of each spray gun 5 can be adjusted by setting a second regulating valve.

The SCR denitrification system of the embodiment of the utility model includes the SCR denitrification spray gun system of any one of the above embodiments.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature indirectly through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

As used herein, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or example. A feature is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. The utility model provides a SCR denitration spray gun system which characterized in that includes:

the spraying gun comprises a plurality of spraying guns, one ends of the spraying guns are suitable for extending into a flue, the spraying guns are arranged at intervals, the spraying guns are divided into a plurality of spraying areas, and the spraying areas are arranged at intervals along the circumferential direction of the flue.

2. The SCR denitration lance system of claim 1, wherein a plurality of the injection zones are located at a same cross section of the flue.

3. The SCR denitration lance system of claim 2, wherein the plurality of lances in the injection zone are arranged in a matrix or spaced apart along a circumferential direction of the flue, and the plurality of lances in the injection zone are arranged in the same manner.

4. The SCR denitration lance system of claim 1, wherein a plurality of the injection zones have the same area on the flue cross section.

5. The SCR denitration lance system of any one of claims 1 to 4, wherein the number of lances of a plurality of the injection zones is the same.

6. The SCR denitration lance system of any one of claims 1 to 4, wherein the number of lances is A and 4 ≦ A ≦ 16.

7. The SCR denitration lance system of any one of claims 1 to 4, wherein the number of injection zones is 2 to 4.

8. The SCR denitration lance system of claim 1, further comprising a plurality of first regulating valves, the plurality of regulating valves corresponding one-to-one to the plurality of injection zones.

9. The SCR denitration lance system of claim 1, further comprising a plurality of second regulating valves, the plurality of second regulating valves corresponding to the plurality of lances one-to-one, respectively.

10. An SCR denitration system comprising the SCR denitration lance system according to any one of claims 1 to 9.

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