Full-automatic ammonia preparing and adding all-in-one machine

Abstract

The utility model relates to the technical field of chemical ammonia water preparation of a water vapor system of a power plant, in particular to a full-automatic ammonia preparing and adding all-in-one machine, which introduces ammonia gas and demineralized water through an ammonia gas pipeline and a demineralized water pipeline respectively, and acquires ammonia water concentration and liquid level signals in a solution tank and ammonia gas alarm instrument signals. The PLC is used for controlling the ammonia gas electric valve, the demineralized water electric valve and the ammonia gas protection valve, under the condition that signals of the ammonia gas alarm instrument do not give an alarm, it is guaranteed that the concentration and the liquid level value in the ammonia solution box reach the required set interval, it is guaranteed that the concentration of ammonia water entering the boiler water supply system has stability, and the stability of the system is guaranteed. The intelligent preparation of ammonia water is realized under the condition that the operation of an operation worker is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical ammonia water configuration in the water vapor system of power plants, and particularly relates to a full-automatic ammonia preparation and ammonia addition integrated machine. Background Technique

[0002] Ammonia is the most commonly used alkalizing agent for metal corrosion prevention in the thermal system. Ammonia water needs to be added to the boiler feed water, so ammonia water is an important chemical raw material. It can effectively prevent corrosion of the boiler feed water pipeline and form an effective protective film on the pipeline surface.

[0003] At present, the ammonia water configuration in power plants is basically manual operation. After purchasing the externally purchased concentrated ammonia water, it is handed over to the operating staff. The staff pour the concentrated ammonia water into the ammonia solution tank according to the configuration ratio, and then supplement a certain proportion of demineralized water. Since the concentration of the externally purchased concentrated ammonia water varies in each batch, and errors are introduced during the manual configuration process, the concentration of the ammonia water solution in the ammonia solution tank often changes. At the same time, it greatly increases the work difficulty of the operating personnel, and the smell of ammonia water is pungent, which causes harm to the operators' bodies. In view of this, an intelligent ammonia preparation integrated machine device is needed. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a full-automatic ammonia preparation and ammonia addition integrated machine, so as to provide ammonia water with a stable concentration for the boiler feed water pipeline.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a full-automatic ammonia preparation and ammonia addition integrated machine, including a solution tank, a demineralized water pipeline, an ammonia gas pipeline and a control mechanism. The demineralized water pipeline is communicated with the solution tank and introduces demineralized water into the solution tank. A demineralized water electric valve is arranged on the demineralized water pipeline. The ammonia gas pipeline is communicated with the solution tank and introduces ammonia gas into the solution tank. An ammonia gas electric valve is arranged on the ammonia gas pipeline. The end of the ammonia gas pipeline extending into the solution tank is connected with an ammonia gas distribution mechanism. The control mechanism includes a controller, a liquid level sensor and an ammonia concentration sensor. The detection parts of the liquid level sensor and the ammonia concentration sensor are both arranged in the solution tank. The controller is connected with the liquid level sensor and the demineralized water electric valve and controls the demineralized water electric valve according to the detection result of the liquid level sensor. The controller is connected with the ammonia concentration sensor and the ammonia gas electric valve and controls the ammonia gas electric valve according to the detection result of the ammonia concentration sensor. A stirring mechanism is arranged in the solution tank. The controller controls the demineralized water electric valve according to the liquid level sensor to realize timely water replenishment of the solution tank. The controller controls the ammonia gas electric valve according to the ammonia concentration sensor to realize the control of the ammonia gas supply amount of the solution tank and realize the automatic configuration of ammonia water.

[0006] As an alternative solution, an ammonia protection valve is provided on the ammonia pipeline between the ammonia electric valve and the solution tank, and an ammonia alarm is provided on the top of the solution tank. The ammonia alarm is connected to the controller. The controller controls the ammonia protection valve through the ammonia alarm to prevent excessive ammonia in the solution tank.

[0007] As an alternative solution, an air source connection part is provided on the ammonia pipeline, and an ammonia inlet stop valve is provided on the ammonia pipeline between the ammonia electric valve and the air source connection part.

[0008] As an alternative solution, an ammonia pressure reducing valve is provided on the ammonia pipeline between the ammonia inlet stop valve and the ammonia electric valve, and an ammonia pressure gauge is provided between the ammonia pressure reducing valve and the ammonia electric valve.

[0009] As an alternative solution, a demineralized water inlet stop valve is provided on the demineralized water pipeline.

[0010] As an alternative solution, a demineralized water bypass manual valve is provided in parallel corresponding to the demineralized water electric valve on the demineralized water pipeline, and ammonia bypass manual valves are provided in parallel corresponding to the ammonia electric valve and the ammonia protection valve on the ammonia pipeline. When the demineralized water electric valve fails, the demineralized water bypass manual valve can be manually operated to replenish water to the solution tank. When the ammonia electric valve and / or the ammonia protection valve fails, the corresponding ammonia bypass manual valve is also manually operated to supplement ammonia to the solution tank.

[0011] As an alternative solution, the ammonia distribution mechanism includes an ammonia main pipe, a pneumatic rotary joint, and ammonia branch pipes. The ammonia main pipe communicates with the ammonia pipeline. The pneumatic rotary joint is provided on the ammonia main pipe and the inlet of the rotary joint communicates with the ammonia main pipe. Each outlet of the pneumatic rotary joint is connected to an ammonia branch pipe. The ammonia branch pipes are distributed circumferentially and a number of ammonia holes are provided on each ammonia branch pipe. Each ammonia branch pipe communicates with the ammonia main pipe and can rotate relative to the ammonia main pipe, which is not only conducive to dispersing ammonia into the solution tank, but also conducive to rotating in cooperation with the stirring mechanism to further improve the ammonia dispersion effect.

[0012] As an alternative solution, the stirring mechanism includes a stirring driving member, a stirring shaft, and stirring paddles. The stirring driving member is provided on the top of the solution tank. The stirring shaft is provided in the solution tank and is connected to the rotating part of the stirring driving member. A number of stirring paddles are provided on the stirring shaft, and the stirring shaft is connected to each ammonia branch pipe.

[0013] As an alternative solution, stirring paddles are also provided on the ammonia branch pipes. The ammonia branch pipes can also play a role in stirring the solution.

[0014] As an alternative solution, there are four ammonia branch pipes which are evenly distributed circumferentially around the rotation axis of the pneumatic rotary joint. The ammonia branch pipes are arc-shaped pipes, and the two opposite ammonia branch pipes are connected by a connecting rod.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The full-automatic ammonia preparation and addition integrated machine of the present utility model is practical and has a high accuracy in controlling the ammonia water concentration. It can accurately and intelligently adjust the ammonia water concentration to meet the requirement of adding ammonia water for the anti-corrosion of the boiler feed water pipeline. Compared with the traditional ammonia preparation system, the intelligent ammonia preparation method is adopted to ensure the stability of the ammonia water concentration and the ammonia water level inside the ammonia solution tank, providing ammonia water with a stable concentration for the boiler feed water ammonia addition system. Each ammonia gas branch pipe of the ammonia gas distribution mechanism can rotate relative to the ammonia gas main pipe, which not only facilitates the dispersion of ammonia gas into the solution tank but also plays a role in stirring the solution to improve the mixing effect and mixing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of the full-automatic ammonia preparation and addition integrated machine of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the stirring mechanism and the ammonia gas distribution mechanism;

[0019] In the figure: 1, solution tank; 2, demineralized water pipeline; 3, ammonia gas pipeline; 4, demineralized water electric valve; 5, demineralized water bypass manual valve; 6, demineralized water inlet stop valve; 7, ammonia gas electric valve; 8, ammonia gas protection valve; 9, ammonia gas alarm; 10, ammonia gas inlet stop valve; 11, ammonia gas bypass manual valve; 12, controller; 13, liquid level sensor; 14, ammonia concentration sensor; 15, stirring mechanism; 16, ammonia gas distribution mechanism; 161, ammonia gas main pipe; 162, pneumatic rotary joint; 163, ammonia gas branch pipe; 17, ammonia gas pressure reducing valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. Embodiment

[0021] A full-automatic ammonia preparation and addition integrated machine, as Figure 1 and Figure 2As shown, it includes a solution tank 1, a demineralized water pipeline 2, an ammonia pipeline 3 and a control mechanism. The demineralized water pipeline 2 is used to introduce the demineralized water from the water source equipment into the solution tank 1, and the ammonia pipeline 3 is used to introduce the ammonia from the gas source equipment into the solution tank 1. The demineralized water and ammonia are mixed in the solution tank 1 to form ammonia water.

[0022] The demineralized water pipeline 2 communicates with the solution tank 1. A water source connection part for connecting the water source equipment is provided on the demineralized water pipeline 2. A demineralized water electric valve 4 is provided on the demineralized water pipeline 2, and the demineralized water electric valve 4 is used to control the on-off state of the demineralized water pipeline 2. A demineralized water inlet stop valve 6 is also provided on the demineralized water pipeline 2, and the demineralized water inlet stop valve 6 is used to prevent a large amount of demineralized water from flowing into the solution tank 1 when the demineralized water electric valve 4 fails.

[0023] The ammonia pipeline 3 communicates with the solution tank 1. A gas source connection part is provided on the ammonia pipeline 3. An ammonia electric valve 7 is provided on the ammonia pipeline 3, and the ammonia electric valve 7 is used to control the on-off state of the ammonia pipeline 3; an ammonia distribution mechanism 16 is provided at the end of the ammonia pipeline 3 extending into the solution tank 1, and the ammonia in the ammonia pipeline 3 is dispersed into the solution tank 1 through the ammonia distribution mechanism 16, facilitating the rapid and full mixing of ammonia and demineralized water.

[0024] An ammonia protection valve 8 is provided on the ammonia pipeline 3 between the ammonia electric valve 7 and the solution tank 1. The ammonia protection valve 8 is used to cut off the ammonia pipeline 3 when the ammonia concentration in the solution tank 1 is too high, preventing ammonia from continuously flowing into the solution tank 1 out of control. An ammonia alarm 9 is provided at the top of the solution tank 1 for detecting the ammonia state in the solution tank 1. An ammonia inlet stop valve 10 is also provided on the ammonia pipeline 3 between the gas source connection part and the ammonia electric valve 7. The ammonia inlet stop valve 10 serves as a protection valve for the ammonia pipeline 3 and disconnects the connection state between the ammonia pipeline 3 and the gas source equipment when the gas source equipment fails.

[0025] An ammonia pressure reducing valve 17 is provided on the ammonia pipeline 3 between the ammonia inlet stop valve 10 and the ammonia electric valve 7. The ammonia pressure reducing valve 17 is used to adjust the pressure of the gas source equipment introduced into the ammonia pipeline 3, preventing ammonia from impacting components such as the ammonia electric valve 7, ammonia protection valve 8 and solution tank 1 located behind on the ammonia pipeline 3. An ammonia pressure gauge is provided on the ammonia pipeline 3 between the ammonia pressure reducing valve 17 and the ammonia electric valve 7, facilitating the operator to understand the air pressure state in the ammonia pipeline 3.

[0026] In some embodiments, a demineralized water bypass manual valve 5 is provided in parallel at the corresponding position of the demineralized water electric valve 4 on the demineralized water pipeline 2. When the demineralized water electric valve 4 fails, the demineralized water bypass manual valve 5 can be manually operated to control the inflow of demineralized water. Ammonia bypass manual valves 11 are provided in parallel at the corresponding positions of the ammonia electric valve 7 and the ammonia protection valve 8 on the ammonia pipeline 3. When the ammonia electric valve 7 and / or the ammonia protection valve 8 fails, the corresponding ammonia bypass manual valve 11 can be operated to control the supply of ammonia.

[0027] The control mechanism includes a controller 12, a liquid level sensor 13, and an ammonia concentration sensor 14. The detection part of the liquid level sensor 13 is arranged in the solution tank 1 to detect the liquid level height in the solution tank 1. The detection part of the ammonia concentration sensor 14 is arranged in the solution tank 1 to detect the ammonia concentration of the mixed solution. The liquid level sensor 13 and the ammonia concentration sensor 14 are both connected to the controller 12 and send the detection results to the controller 12. The controller 12 is also connected to the demineralized water electric valve 4, the ammonia electric valve 7, and the ammonia protection valve 8. The controller 12 adjusts the demineralized water electric valve 4 according to the detection result of the liquid level sensor 13 to timely replenish water to the solution tank 1. The controller 12 adjusts the ammonia electric valve 7 or the ammonia protection valve 8 according to the detection result of the ammonia concentration sensor 14 to timely supply ammonia to the solution tank 1.

[0028] As a preferred example, the controller 12 is a PLC controller 12 and is equipped with a touch display screen. Through the touch display screen, various parameters of the controller 12 can be adjusted, and various data such as the liquid level of the solution tank 1 and the ammonia concentration of the solution can also be understood.

[0029] The ammonia alarm 9 is also connected to the controller 12 so that the operator can adjust the ammonia alarm 9 through the controller 12.

[0030] The following is an example of intelligent ammonia preparation using a fully automatic ammonia preparation and addition machine according to this embodiment: First, open the demineralized water inlet stop valve 6 and the ammonia gas inlet stop valve 10, adjust the ammonia gas pressure reducing valve 17 so that its outlet pressure is 0.3 Mpa, close the demineralized water bypass manual valve 5 and each ammonia gas bypass manual valve 11. Set the upper and lower limit values of the ammonia concentration of the ammonia water solution to be prepared in the solution tank 1 on the touch display screen equipped with the controller 12, set the upper and lower limit values of the liquid level in the solution tank 1 and the alarm value of the ammonia gas alarm 9. After setting, control the ammonia gas electric valve 7 and the demineralized water electric valve 4 to open through the controller 12, and the demineralized water and ammonia gas are introduced into the solution tank 1, and rapid stirring and mixing are carried out under the action of the stirring mechanism 15. During the process of preparing ammonia water, the controller 12 adjusts the state of the ammonia gas electric valve 7 in a timely manner according to the detection result of the ammonia concentration sensor 14. When the ammonia concentration is lower than the set lower limit value of the ammonia concentration, the ammonia gas electric valve 7 is opened. When the ammonia concentration is greater than the set upper limit value of the ammonia concentration, the ammonia gas electric valve 7 is closed to ensure the stability of the ammonia concentration of the ammonia water; the controller 12 also adjusts the state of the demineralized water electric valve 4 in a timely manner according to the detection result of the liquid level sensor 13. When the liquid level of the solution tank 1 is less than the set lower limit value of the liquid level, the demineralized water electric valve 4 is opened to supplement demineralized water into the solution tank 1. When the liquid level of the solution tank 1 is greater than the set upper limit value of the liquid level, the demineralized water electric valve 4 is closed to ensure the stability of the liquid level height in the solution tank 1; the controller 12 also adjusts the state of the ammonia gas pipeline 3 in a timely manner according to the signal of the ammonia gas alarm 9. When the ammonia gas alarm 9 detects that the ammonia gas concentration in the solution tank 1 is less than the set ammonia gas concentration value, the ammonia gas alarm 9 does not alarm and the ammonia gas protection valve 8 is opened. When the ammonia gas alarm 9 detects that the ammonia gas concentration in the solution tank 1 is greater than the set ammonia gas concentration value, the ammonia gas alarm 9 alarms and the controller 12 controls the ammonia gas protection valve 8 to close.

[0031] Please refer to Figure 2 , the ammonia gas distribution mechanism 16 is arranged in the solution tank 1. The ammonia gas distribution mechanism 16 is used to disperse the ammonia gas in the ammonia gas pipeline 3 into the solution tank 1 to improve the mixing efficiency of ammonia gas and demineralized water. The ammonia gas distribution mechanism 16 includes an ammonia gas main pipe 161, a pneumatic rotary joint 162 and ammonia gas branch pipes 163. The ammonia gas main pipe 161 is communicated with the ammonia gas pipeline 3. A pneumatic rotary joint 162 is arranged on the ammonia gas main pipe 161. The rotation axis of the pneumatic rotary joint 162 is vertical. The fixed part of the pneumatic rotary joint 162 is connected to the ammonia gas main pipe 161 and the air inlet arranged on the fixed part is communicated with the ammonia gas main pipe 161. A plurality of air outlets are arranged on the rotating part of the pneumatic rotary joint 162, and each air outlet is connected with an ammonia gas branch pipe 163. Each ammonia gas branch pipe 163 is communicated with the ammonia gas main pipe 161 through the pneumatic rotary joint 162 and each ammonia gas branch pipe 163 can rotate relative to the ammonia gas main pipe 161. A plurality of ammonia gas holes are arranged on the ammonia gas branch pipes 163. The ammonia gas in the ammonia gas pipeline 3 is dispersed into each ammonia gas branch pipe 163 and is dispersed into the solution tank 1 through the multiple ammonia gas holes of the ammonia gas branch pipes 163.

[0032] The stirring mechanism 15 is arranged in the solution tank 1. The stirring mechanism 15 stirs the solution in the solution tank 1 so that ammonia gas and demineralized water can be quickly and fully mixed. The stirring mechanism 15 includes a stirring driving member, a stirring shaft and stirring paddles. The stirring driving member is a reduction motor. The stirring driving member is arranged on the top of the solution tank 1, and its rotating part extends into the solution tank 1. The rotating part of the stirring driving member is connected with a stirring shaft. The stirring shaft is vertical and coaxial with the rotating shaft of the pneumatic rotary joint 162. A plurality of stirring paddles are arranged on the stirring shaft. The stirring driving member drives each stirring member to rotate around the stirring shaft, so as to realize the stirring of the solution. The stirring shaft is also connected with each ammonia gas branch pipe 163. While the stirring shaft rotates, it also drives each ammonia gas branch pipe 163 to rotate. The rotation of the ammonia gas branch pipe 163 not only plays a role in stirring, but also can make the ammonia gas more dispersed.

[0033] As a preferred embodiment, the ammonia gas branch pipe 163 is an arc-shaped pipe. Four ammonia gas branch pipes 163 are arranged and evenly distributed along the circumferential direction with the rotating shaft of the pneumatic rotary joint 162 as the center. The four ammonia gas branch pipes 163 form an elliptical shape. To strengthen the strength of the ammonia gas branch pipe 163, the two ammonia gas branch pipes 163 in the relative positions are connected by a connecting rod.

[0034] In some embodiments, stirring paddles are also arranged on the ammonia gas branch pipe 163. While the ammonia gas branch pipe 163 rotates, it can also use the stirring paddles to stir the solution.

[0035] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes an equivalent replacement or change, and should be covered by the protection scope of the present invention.

Claims

1. A fully automatic ammonia preparation and ammonia addition machine, characterized by: The invention comprises a solution tank (1), a desalted water pipeline (2), an ammonia pipeline (3) and a control mechanism, wherein the desalted water pipeline (2) is connected to the solution tank (1) and passes desalted water into the solution tank (1), a desalted water electric valve (4) is arranged on the desalted water pipeline (2), an ammonia pipeline (3) is connected to the solution tank (1) and passes ammonia into the solution tank (1), an ammonia electric valve (7) is arranged on the ammonia pipeline (3), an end of the ammonia pipeline (3) extending into the solution tank (1) is connected to an ammonia distribution mechanism (16), and the control mechanism comprises a controller (12), a liquid level sensor (1 3) and an ammonia concentration sensor (14), the liquid level sensor (13) and the detection parts of the ammonia concentration sensor (14) are both arranged in the solution tank (1), the controller (12) is connected to the liquid level sensor (13) and the desalted water electric valve (4) and controls the desalted water electric valve (4) according to the detection result of the liquid level sensor (13), the controller (12) is connected to the ammonia concentration sensor (14) and the ammonia electric valve (7) and controls the ammonia electric valve (7) according to the detection result of the ammonia concentration sensor (14), and a stirring mechanism (15) is arranged in the solution tank (1).

2. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 1, characterized in that: An ammonia protection valve (8) is provided on the ammonia pipeline (3) between the ammonia electric valve (7) and the solution tank (1), and an ammonia alarm (9) is provided on the top of the solution tank (1). The ammonia alarm (9) is connected to the controller (12).

3. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 2 is characterized in that: A gas source connection portion is provided on the ammonia pipeline (3), and an ammonia inlet stop valve (10) is provided on the ammonia pipeline (3) between the ammonia electric valve (7) and the gas source connection portion.

4. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 3 is characterized in that: An ammonia pressure reducing valve (17) is provided on the ammonia pipeline (3) between the ammonia inlet stop valve (10) and the ammonia electric valve (7), and an ammonia pressure gauge is provided between the ammonia pressure reducing valve (17) and the ammonia electric valve (7).

5. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 4 is characterized in that: The desalted water pipeline (2) is provided with a desalted water inlet stop valve (6).

6. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 5, characterized in that: A desalted water bypass manual valve (5) is provided in parallel with the desalted water electric valve (4) on the desalted water pipeline (2), and an ammonia bypass manual valve (11) is provided in parallel with the ammonia electric valve (7) and the ammonia protection valve (8) on the ammonia pipeline (3).

7. A fully automatic ammonia preparation and ammonia addition integrated machine according to any one of claims 1 to 6, characterized in that: The ammonia distribution mechanism (16) comprises an ammonia main pipe (161), a pneumatic rotary joint (162) and an ammonia branch pipe (163); the ammonia main pipe (161) is in communication with the ammonia pipeline (3); the pneumatic rotary joint (162) is arranged on the ammonia main pipe (161) and the air inlet of the rotary joint is in communication with the ammonia main pipe (161); each air outlet of the pneumatic rotary joint (162) is connected to an ammonia branch pipe (163); each ammonia branch pipe (163) is distributed along the circumferential direction and each ammonia branch pipe (163) is provided with a plurality of ammonia holes.

8. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 7, characterized in that: The stirring mechanism (15) comprises a stirring drive member, a stirring shaft and a stirring paddle. The stirring drive member is arranged at the top of the solution tank (1). The stirring shaft is arranged in the solution tank (1) and is connected to the rotating part of the stirring drive member. A plurality of stirring paddles are arranged on the stirring shaft. The stirring shaft is connected to each ammonia branch pipe (163).

9. The fully automatic ammonia preparation and ammonia addition integrated machine according to claim 8, characterized in that: The ammonia gas distribution pipe (163) is also provided with a stirring paddle.

10. The fully automatic ammonia preparation and addition machine according to claim 8, characterized in that: There are four ammonia gas branch pipes (163) which are evenly distributed along the circumference with the rotating axis of the pneumatic rotary joint (162) as the center. The ammonia gas branch pipes (163) are arc-shaped pipes, and two opposite ammonia gas branch pipes (163) are connected by a connecting rod.

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