A chemical reagent injection system

Abstract

This utility model discloses a chemical reagent injection system, which includes a dosing assembly comprising a solution tank, a first delivery pipe, a pump, a second delivery pipe, a first valve, a second valve, and a first venting assembly. The solution tank, the first delivery pipe, the pump, and the second delivery pipe are sequentially connected, with the second delivery pipe connected to the dosing system. The first valve and the second valve are both located on the first delivery pipe. The first venting assembly includes a main venting line, a third valve, and a calibration column. The main venting line is connected to the first delivery pipe between the first valve and the pump, forming a U-shaped connecting pipe structure. The third valve and the calibration column are respectively located on the main venting line. This utility model solves the problem of pump failure during hydrazine injection, increases pump redundancy, and reduces the risk of the hydrazine value in the secondary loop exceeding the specified limit.

Description

Technical Field

[0001] This utility model relates to the field of chemical reagent injection technology, and in particular to a chemical reagent injection system. Background Technology

[0002] The hydrazine dosing pump in the chemical reagent injection system frequently fails to operate. The main symptom is that the pump and motor are running normally, but the pump suddenly stops working. The reason is that hydrazine has strong reducing properties. When left to stand in the air, it reacts with oxygen and decomposes into nitrogen and other products. This process releases gas and forms bubbles. In addition, hydrazine has a certain viscosity and easily adheres to the inside of the pipeline. These bubbles can randomly enter the pump, causing it to stop working. Utility Model Content

[0003] The technical problem to be solved by this invention is to provide a chemical reagent injection system.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A chemical reagent injection system, comprising:

[0006] The dosing assembly includes a solution tank, a first delivery pipe, a pump, a second delivery pipe, a first valve, and a second valve.

[0007] The solution tank, the first delivery pipe, the pump, and the second delivery pipe are sequentially connected. The second delivery pipe is connected to the dosing system. The first valve is located on the first delivery pipe, and the second valve is located on the second delivery pipe.

[0008] The first exhaust assembly includes the main exhaust line, the third valve, and the calibration column;

[0009] The main exhaust pipeline is connected to the first delivery pipe between the first valve and the pump. The solution tank, the first delivery pipe, and the main exhaust pipeline form a U-shaped connecting pipe structure so that the solution in the solution tank and the solution in the main exhaust pipeline are at the same level. The third valve and the calibration column are respectively installed on the main exhaust pipeline, and the third valve is located between the first delivery pipe and the calibration column.

[0010] Furthermore, the chemical reagent injection system preferably further includes a second exhaust assembly connected to the second delivery pipe.

[0011] Furthermore, in the aforementioned chemical reagent injection system, the second exhaust assembly preferably includes a secondary exhaust pipe connected to the second delivery pipe and a fourth valve connected to the secondary exhaust pipe, wherein the secondary exhaust pipe is located between the pump and the second valve, and the end of the secondary exhaust pipe away from the second delivery pipe is connected to the external environment.

[0012] Furthermore, in the aforementioned chemical reagent injection system, the main exhaust pipeline preferably includes a first main exhaust pipe and a second main exhaust pipe;

[0013] The first main exhaust pipe, the calibration column, and the second main exhaust pipe are sequentially connected, with the first main exhaust pipe located between the first valve and the pump, and the second main exhaust pipe connected to the external environment.

[0014] Furthermore, in the aforementioned chemical reagent injection system, preferably the axis of the first main exhaust pipe is perpendicular to the axis of the first delivery pipe, and the axis of the second main exhaust pipe is parallel to the axis of the first delivery pipe.

[0015] Furthermore, in the aforementioned chemical reagent injection system, preferably, the top surface of the second main exhaust pipe is at the same horizontal level as the top surface of the solution tank.

[0016] Furthermore, in the aforementioned chemical reagent injection system, the second exhaust assembly preferably further includes a fifth valve and a pressure gauge; the fifth valve and the pressure gauge are respectively disposed on the auxiliary exhaust pipe, and the pressure gauge is located between the fourth valve and the fifth valve.

[0017] Furthermore, in the aforementioned chemical reagent injection system, the auxiliary exhaust pipe preferably includes a first exhaust pipe and a second exhaust pipe;

[0018] One end of the first exhaust pipe is connected to the second delivery pipe, and the other end of the first exhaust pipe is connected to the pressure gauge. The fifth valve is installed on the first exhaust pipe. The second exhaust pipe is connected to the first exhaust pipe between the fifth valve and the pressure gauge. The fourth valve is installed on the second exhaust pipe.

[0019] Furthermore, in the aforementioned chemical reagent injection system, preferably the axis of the second exhaust pipe is parallel to the axis of the second delivery pipe and extends in a direction away from the solution tank.

[0020] Furthermore, in the aforementioned chemical reagent injection system, preferably, a scale is provided on the surface of the calibration column.

[0021] The implementation of this utility model has the following beneficial effects: it solves the problem of the pump not working during the hydrazine injection process, increases pump redundancy, and reduces the risk of the hydrazine value in the secondary circuit exceeding the specified limit. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a chemical reagent injection system according to some embodiments of the present invention;

[0024] Figure 2 yes Figure 1 The diagram shows the combined structure of the dosing assembly and the first exhaust assembly.

[0025] Figure 3 yes Figure 1 The diagram shows the combined structure of the dosing assembly and the second exhaust assembly. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0027] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0029] The technical solution adopted by this utility model to solve its technical problem is:

[0030] like Figures 1 to 2 As shown, some embodiments of this utility model disclose a chemical reagent injection system. In some embodiments, this system may include a dosing assembly 10, a first venting assembly 20, and a second venting assembly 30. The first venting assembly 20 and the second venting assembly 30 are respectively installed on the dosing assembly 10. The dosing assembly 10 is used to deliver hydrazine to downstream equipment (dosing equipment), and the first venting assembly 20 and the second venting assembly 30 respectively vent the gases generated during the hydrazine delivery process by the dosing assembly 10.

[0031] For reference Figure 3In some embodiments, the dosing assembly 10 may include a solution tank 11, a first delivery pipe 12, a pump 13, a second delivery pipe 14, a first valve 15, and a second valve 16. The solution tank 11, the first delivery pipe 12, the pump 13, and the second delivery pipe 14 are sequentially connected, with the second delivery pipe 14 connected to the dosing system. The first valve 15 is located on the first delivery pipe 12, and the second valve 16 is located on the second delivery pipe 14. Understandably, hydrazine is stored in the solution tank 11. The pump 13 generates suction and delivers the hydrazine from the solution tank 11 to the dosing system through the first delivery pipe 12 and the second delivery pipe 14. The first valve 15 shuts off the delivery process through the first delivery pipe 12, and the second valve 16 shuts off the delivery process through the second delivery pipe 14.

[0032] Continue to refer to Figure 2 and Figure 3 In some embodiments, the first exhaust assembly 20 may include a main exhaust line 21, a third valve 22, and a calibration column 23. The main exhaust line 21 is connected to a first delivery pipe 12 located between the first valve 15 and the pump 13. The solution tank 11, the first delivery pipe 12, and the main exhaust line 21 form a U-shaped connecting pipe structure, so that the solution in the solution tank 11 and the solution in the main exhaust line 21 are at the same horizontal level. The third valve 22 and the calibration column 23 are respectively located on the main exhaust line 21, with the third valve 22 situated between the first delivery pipe 12 and the calibration column 23.

[0033] During venting, the first valve 15 is closed to stop the delivery of the solution in the first delivery pipe 12. The second valve 16, as well as the fourth valve 32 and the fifth valve 33 on the second venting assembly 30, are also closed. The third valve 22 is opened. At this time, the pump 13 draws the solution from the main venting line 21 and the calibration column 23. When a certain amount of solution has been drawn from the main venting line 21 and the calibration column 23, the first valve 15 is opened. The solution in the solution tank 11 quickly replenishes the main venting line 21 and the calibration column 23, so as to impact the solution containing gas in the first delivery pipe 12 into the main venting line 21 and the calibration column 23. Finally, the gas is discharged through the outlet of the main venting line 21 to prevent gas from entering the pump 13 and affecting the working efficiency of the pump 13.

[0034] In some embodiments, the main exhaust pipe 21 may include a first main exhaust pipe 211 and a second main exhaust pipe 212. The first main exhaust pipe 211, the calibration column 23, and the second main exhaust pipe 212 are sequentially connected, with the first main exhaust pipe 211 located between the first valve 15 and the pump 13, and the second main exhaust pipe 212 connected to the external environment. The upper surface of the second main exhaust pipe 212 is at the same level as the upper surface of the solution tank 11. Understandably, the solution tank 11, the first delivery pipe 12, the first main exhaust pipe 211, and the second main exhaust pipe 212 form a U-shaped connecting pipe. When the U-shaped connecting pipe is connected (without closing the first valve 15 and the third valve 22), the solution level in the solution tank 11 and the solution level in the second main exhaust pipe 212 are at the same horizontal level.

[0035] In some embodiments, the calibration column 23 is a transparent tube with a scale on its surface to allow observation of the amount of solution inside the calibration column 23.

[0036] During venting, the first valve 15 is closed to stop the delivery of the solution in the first delivery pipe 12. The second valve 16, as well as the fourth valve 32 and the fifth valve 33 on the second venting assembly 30, are also closed. The third valve 22 is opened. At this time, the pump 13 draws the solution from the main venting line 21 and the calibration column 23. When the solution in the main venting line 21 and the calibration column 23 is drawn to two-thirds (observed by a ruler), the first valve 15 is opened. The solution in the solution tank 11 quickly replenishes the solution in the main venting line 21 and the calibration column 23, so as to impact the gas-containing solution in the first delivery pipe 12 into the main venting line 21 and the calibration column 23. Finally, the gas is discharged through the outlet of the main venting line 21.

[0037] like Figure 1 and Figure 3 As shown, in some embodiments, the second exhaust assembly 30 may include a secondary exhaust pipe 31, a fourth valve 32, a fifth valve 33, and a pressure gauge 34. The secondary exhaust pipe 31 is installed on the second delivery pipe 14 and is located between the pump 13 and the second valve 16. The end of the secondary exhaust pipe 31 away from the second delivery pipe 14 is connected to the external environment. The fourth valve 32, the fifth valve 33, and the pressure gauge 34 are respectively disposed on the secondary exhaust pipe 31. The fourth valve 32 is located at the end away from the second delivery pipe 14, the fifth valve 33 is located at the end closer to the second delivery pipe 14, and the pressure gauge 34 is located between the fourth valve 32 and the fifth valve 33.

[0038] In some embodiments, the secondary exhaust pipe 31 may include a first exhaust pipe 311 and a second exhaust pipe 312. One end of the first exhaust pipe 311 is connected to the second delivery pipe 14, and the other end is connected to a pressure gauge 34. A fifth valve 33 is disposed on the first exhaust pipe 311. The second exhaust pipe 312 is connected to the first exhaust pipe 311 between the fifth valve 33 and the pressure gauge 34, and a fourth valve 32 is disposed on the second exhaust pipe 312. The axis of the second exhaust pipe 312 is parallel to the axis of the second delivery pipe 14 and extends away from the solution tank 11.

[0039] During exhaust, close the first valve 15, the second valve 16, and the third valve 22; open the fourth valve 32 and the fifth valve 33 to discharge the gas in the second delivery pipe 14, the first exhaust pipe 311, and the second exhaust pipe 312. After the gas is discharged, close the fourth valve 32 and the fifth valve 33; open the first valve 15, the second valve 16, and the pump 13 to transport hydrazine.

[0040] It should be noted that, for those skilled in the art, without departing from the concept of this utility model, the above-mentioned technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this utility model.

Claims

1. A chemical agent injection system characterized by, include: The dosing assembly (10) includes a solution tank (11), a first delivery pipe (12), a pump (13), a second delivery pipe (14), a first valve (15), and a second valve (16); The solution tank (11), the first delivery pipe (12), the pump (13) and the second delivery pipe (14) are sequentially connected. The second delivery pipe (14) is connected to the dosing system. The first valve (15) is located on the first delivery pipe (12) and the second valve (16) is located on the second delivery pipe (14). The first exhaust assembly (20) includes a main exhaust line (21), a third valve (22), and a calibration column (23); The main exhaust pipe (21) is connected to the first delivery pipe (12) between the first valve (15) and the pump (13). The solution tank (11), the first delivery pipe (12) and the main exhaust pipe (21) form a U-shaped connecting pipe structure so that the solution in the solution tank (11) and the solution in the main exhaust pipe (21) are at the same level. The third valve (22) and the calibration column (23) are respectively set on the main exhaust pipe (21), and the third valve (22) is located between the first delivery pipe (12) and the calibration column (23).

2. The chemical agent injection system of claim 1, wherein, It also includes a second exhaust assembly (30) connected to the second delivery pipe (14).

3. The chemical agent injection system of claim 2, wherein, The second exhaust assembly (30) includes a secondary exhaust pipe (31) connected to the second delivery pipe (14) and a fourth valve (32) connected to the secondary exhaust pipe (31). The secondary exhaust pipe (31) is located between the pump (13) and the second valve (16). The end of the secondary exhaust pipe (31) away from the second delivery pipe (14) is connected to the external environment.

4. The chemical agent injection system of claim 1, wherein, The main exhaust pipe (21) includes a first main exhaust pipe (211) and a second main exhaust pipe (212); The first main exhaust pipe (211), the calibration column (23) and the second main exhaust pipe (212) are connected in sequence, and the first main exhaust pipe (211) is located between the first valve (15) and the pump (13), while the second main exhaust pipe (212) is connected to the external environment.

5. The chemical agent injection system of claim 4, wherein, The axis of the first main exhaust pipe (211) is perpendicular to the axis of the first delivery pipe (12), and the axis of the second main exhaust pipe (212) is parallel to the axis of the first delivery pipe (12).

6. The chemical agent injection system of claim 4, wherein, The top surface of the second main exhaust pipe (212) is at the same level as the top surface of the solution tank (11).

7. The chemical agent injection system of claim 3, wherein The second exhaust assembly (30) also includes a fifth valve (33) and a pressure gauge (34); the fifth valve (33) and the pressure gauge (34) are respectively disposed on the auxiliary exhaust pipe (31), and the pressure gauge (34) is located between the fourth valve (32) and the fifth valve (33).

8. The chemical agent injection system of claim 7, wherein, The secondary exhaust pipe (31) includes a first exhaust pipe (311) and a second exhaust pipe (312); One end of the first exhaust pipe (311) is connected to the second delivery pipe (14), and the other end of the first exhaust pipe (311) is connected to the pressure gauge (34). The fifth valve (33) is disposed on the first exhaust pipe (311). The second exhaust pipe (312) is connected to the first exhaust pipe (311) between the fifth valve (33) and the pressure gauge (34). The fourth valve (32) is disposed on the second exhaust pipe (312).

9. The chemical agent injection system of claim 8, wherein, The axis of the second exhaust pipe (312) is parallel to the axis of the second delivery pipe (14) and extends away from the solution tank (11).

10. The chemical reagent injection system according to claim 1, characterized in that, The calibration column (23) has a scale on its surface.

Images