Automatic ammonia adding device for ammonia desulfurization
By introducing a filter screen and slider system into the ammonia desulfurization unit, combined with sensors and controllers, the ammonia water volume can be automatically adjusted, solving the problem of sulfur dioxide concentration changes caused by unstable sulfur content in coal, and ensuring desulfurization effect and environmental performance.
Patent Information
- Application Number
- CN202423233111.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In the existing ammonia-based desulfurization process, the sulfur content of the coal is unstable and the boiler load changes, resulting in dynamic changes in the sulfur dioxide concentration. The current manual control of ammonia addition is insufficient or excessive, which leads to incomplete desulfurization or ammonia water overflow, causing pollution.
An automatic ammonia addition device for ammonia desulfurization was designed. By installing a filter screen and a slider system in the flue gas inlet pipe, combined with a distance sensor and controller, the ammonia water dosage is adjusted in real time to ensure the matching of ammonia water and flue gas, and to avoid flue gas leakage and ammonia water waste.
It enables automatic adjustment of ammonia water volume based on flue gas flow rate, ensuring the stability of desulfurization effect, avoiding excessive flue gas emissions and ammonia water overflow, and reducing pollution risks.
Smart Images
Figure CN223668970U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ammonia desulfurization technical field, concretely is an automatic ammonia adding device of ammonia desulfurization. BACKGROUND
[0002] Ammonia desulfurization is a kind of high efficiency, low energy consumption wet desulfurization mode, desulfurization process is gas-liquid phase reaction, reaction rate is fast, absorbent utilization rate is high, in ammonia desulfurization, to be able to guarantee the absorption capacity of the whole desulfurization circulating liquid itself, need to add ammonia in this process, and ammonia needs to use ammonia adding device.
[0003] In prior art, the main problem existing in operation process is that due to the high and low instability of sulfur content of coal-fired, the change of boiler load is not constant, which causes the dynamic change of sulfur dioxide concentration in flue gas, and the existing manual control of ammonia adding cannot follow the change of above-mentioned sulfur dioxide concentration, ammonia adding control lags, so as to cause insufficient ammonia adding, insufficient desulfurization absorption, emission exceeds the standard, ammonia water overflow caused by excessive ammonia injection causes secondary pollution, therefore, we propose an automatic ammonia adding device of ammonia desulfurization to solve the above problems. UTILITY MODEL CONTENT
[0004] The utility model aims at providing an automatic ammonia adding device of ammonia desulfurization to solve the problems proposed in the above background.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: an automatic ammonia adding device of ammonia desulfurization, comprising a desulfurization tower, the left side of the desulfurization tower is connected with flue gas inlet pipe, the right side of the desulfurization tower is provided with ammonia water tank, the top of ammonia water tank is connected with water pump, water pump is connected with ammonia injection grid in the inside of desulfurization tower through connecting pipe, water pump is electrically connected with controller for controlling the flow of water pump, the inside of flue gas inlet pipe is slidably connected with filter screen, the lateral movement amount of filter screen in the inside of flue gas inlet pipe reflects the flow of flue gas in flue gas inlet pipe within a certain time, so as to control the discharge amount of corresponding ammonia water.
[0006] Further preferably, the top of the flue gas inlet pipe is provided with a limiting hole, the top of the filter screen is fixedly connected with a sliding block, and the top of the sliding block extends to the outside of the flue gas inlet pipe and is slidably connected with the inner wall of the limiting hole.
[0007] Further preferably, the top of the flue gas inlet pipe is provided with a protective box, a distance sensor for detecting the lateral movement amount of the sliding block is fixedly connected to the left inner wall of the protective box, the distance sensor transmits signals to the controller, so that the controller controls the flow of the water pump according to the movement amount.
[0008] Further preferably, the left and right sides of the sliding block are fixedly connected with a first baffle and a second baffle respectively, and the first baffle and the second baffle both extend out of the protection box and are in sliding connection with the protection box.
[0009] Further preferably, the lengths of the first baffle and the second baffle are both greater than the length of the limiting hole, and the widths of the first baffle and the second baffle are both greater than the width of the limiting hole.
[0010] Further preferably, the inside of the protection box is fixedly connected with a positioning rod in the transverse direction, the sliding block is in sliding connection with the positioning rod, and a spring is fixedly connected between the sliding block and the protection box and movably sleeved on the outside of the positioning rod.
[0011] Further preferably, the inside of the flue gas inlet pipe is provided with a motor, and the output shaft end of the motor is fixedly connected with an eccentric block, which is arranged to knock the reset filter screen to avoid excessive lateral movement of the filter screen caused by the blockage of filter eyes.
[0012] Compared with the prior art, the flue gas inlet pipe of the utility model is internally connected with a filter screen, the lateral movement of the filter screen in the flue gas inlet pipe reflects the flow rate of flue gas flowing in the flue gas inlet pipe within a certain time, thereby controlling the corresponding ammonia water discharge amount, flue gas is discharged into the desulfurization tower through the flue gas inlet pipe, when the flue gas passes through the filter screen, most of the flue gas passes through the filter eyes of the filter screen, and a small amount of flue gas is blocked by the filter screen, the filter screen is subjected to a rightward thrust, the filter screen drives the sliding block to slide rightward in the limiting hole, the sliding block drives the first baffle and the second baffle to synchronously move rightward while moving rightward, thereby avoiding the outflow of flue gas through the limiting hole, the setting of the protection box also has the effect of avoiding flue gas leakage, the spring is compressed, when the flow rate is stable, the distance sensor measures the distance between the sliding block, thereby transmitting a signal to the controller, the controller controls the water pump to work and adjusts to the corresponding flow rate, the water pump flows the ammonia water in the ammonia water tank into the ammonia injection grid through the connecting pipe and sprays it out, when the flue gas inlet pipe stops discharging flue gas, the spring drives the filter screen to reset, the controller controls the motor to work, and the motor drives the eccentric block to knock the filter screen, thereby avoiding the blockage of filter eyes. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a front view structural schematic diagram of the utility model;
[0014] Figure 2 It is a front view sectional plane structural schematic diagram of the flue gas inlet pipe of the utility model;
[0015] Figure 3 It is Figure 2 It is an enlarged stereoscopic structural schematic diagram of the A area in the middle.
[0016] In the figure: 1, desulfurization tower; 2, flue gas inlet pipe; 3, ammonia water tank; 4, water pump; 5, controller; 6, connecting pipe; 7, filter screen; 8, protective box; 9, limiting hole; 10, sliding block; 11, first baffle; 12, second baffle; 13, distance sensor; 14, motor; 15, eccentric block; 16, positioning rod; 17, spring. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] Please refer to Figures 1-3 The utility model provides a kind of technical scheme: an automatic ammonia feeding device of ammonia desulfurization, including desulfurization tower 1, the left side of desulfurization tower 1 is connected with flue gas inlet pipe 2, the right side of desulfurization tower 1 is provided with ammonia water tank 3, the top of ammonia water tank 3 is connected with water pump 4, water pump 4 is connected with the ammonia injection grid inside desulfurization tower 1 by connecting pipe 6, water pump 4 is electrically connected with controller 5 for controlling the flow of water pump 4 by wire, the inside of flue gas inlet pipe 2 is slidably connected with filter screen 7, the lateral movement amount of filter screen 7 in the inside of flue gas inlet pipe 2, the flow of flue gas flowing in flue gas inlet pipe 2 within a certain time is reflected, to control the corresponding ammonia water discharge amount, when using, flue gas is discharged into desulfurization tower 1 by flue gas inlet pipe 2, when flue gas passes through filter screen 7, most of flue gas passes through the filter eye of filter screen 7, a small part of flue gas is blocked by filter screen 7, filter screen 7 is subjected to the right thrust, filter screen 7 drives sliding block 10 to slide right in limiting hole 9, while sliding block 10 moves right, drive first baffle 11 and second baffle 12 to move right synchronously, avoid flue gas to flow outwards through limiting hole 9, the setting of protective box 8 also plays the effect of avoiding flue gas leakage, spring 17 is compressed, when flow rate is stable, distance sensor 13 measures the distance between sliding block 10 at this time, to transmit signal to controller 5, controller 5 controls water pump 4 to work and adjusts to corresponding flow, water pump 4 flows the ammonia water in ammonia water tank 3 into ammonia injection grid and sprays out through connecting pipe 6, when flue gas inlet pipe 2 stops discharging flue gas, spring 17 drives filter screen 7 to reset, controller 5 controls motor 14 to work, motor 14 drives eccentric block 15 to knock filter screen 7, to avoid filter eye blockage.
[0019] In the embodiment, specifically: the top of flue gas inlet pipe 2 is provided with limiting hole 9, the top of filter screen 7 is fixedly connected with sliding block 10, the top of sliding block 10 extends to the outside of flue gas inlet pipe 2 and is slidably connected with the inner wall of limiting hole 9;
[0020] In this embodiment, specifically: the top of the flue gas inlet pipe 2 is provided with a protective box 8, the left inner wall of the protective box 8 is fixedly connected with a distance sensor 13 for detecting the lateral movement amount of the sliding block 10, the distance sensor 13 transmits signals to the controller 5, so that the controller 5 controls the flow of the water pump 4 according to the movement amount;
[0021] In this embodiment, specifically: the left and right sides of the sliding block 10 are fixedly connected with a first baffle 11 and a second baffle 12, respectively, and the first baffle 11 and the second baffle 12 extend out of the protective box 8 and are slidingly connected with the protective box 8;
[0022] In this embodiment, specifically: the length of the first baffle 11 and the second baffle 12 is greater than the length of the limiting hole 9, and the width of the first baffle 11 and the second baffle 12 is greater than the width of the limiting hole 9;
[0023] In this embodiment, specifically: the inside of the protective box 8 is fixedly connected with a positioning rod 16 in the transverse direction, the sliding block 10 is slidingly connected with the positioning rod 16, and the sliding block 10 and the protective box 8 are fixedly connected with a spring 17, and the spring 17 is movably sleeved on the outside of the positioning rod 16;
[0024] In this embodiment, specifically: the inside of the flue gas inlet pipe 2 is provided with a motor 14, the output shaft end of the motor 14 is fixedly connected with an eccentric block 15, and the eccentric block 15 is eccentrically rotated to knock the reset filter screen 7, so as to avoid that the filter screen 7 moves too much in the transverse direction due to the blockage of the filter eyes.
[0025] In use, the flue gas is discharged into the desulfurization tower 1 through the flue gas inlet pipe 2, when the flue gas passes through the filter screen 7, most of the flue gas passes through the filter eyes of the filter screen 7, and a small part of the flue gas is blocked by the filter screen 7, the filter screen 7 is subjected to a rightward thrust, the filter screen 7 drives the sliding block 10 to slide rightward in the limiting hole 9, the sliding block 10 moves rightward while driving the first baffle 11 and the second baffle 12 to move rightward synchronously, so as to avoid that the flue gas flows out through the limiting hole 9, the protective box 8 also plays a role in avoiding the leakage of the flue gas, the spring 17 is compressed, when the flow rate is stable, the distance between the distance sensor 13 and the sliding block 10 is measured at this time, and then signals are transmitted to the controller 5, the controller 5 controls the water pump 4 to work and adjusts to the corresponding flow rate, the water pump 4 causes the ammonia water in the ammonia water tank 3 to flow into the ammonia injection grid through the connecting pipe 6 and to be sprayed out, when the flue gas inlet pipe 2 stops discharging the flue gas, the spring 17 drives the filter screen 7 to reset, the controller 5 controls the motor 14 to work, the motor 14 drives the eccentric block 15 to knock the filter screen 7, so as to avoid the blockage of the filter eyes.
[0026] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An automatic ammonia addition device for ammonia desulfurization, comprising a desulfurization tower (1), wherein a flue gas inlet pipe (2) is connected to the left side of the desulfurization tower (1), an ammonia water tank (3) is provided on the right side of the desulfurization tower (1), and a water pump (4) is connected to the top of the ammonia water tank (3), the water pump (4) being connected to an ammonia injection grid inside the desulfurization tower (1) via a connecting pipe (6), characterized in that: The water pump (4) is electrically connected with a controller (5) for controlling the flow of the water pump (4) through a wire, the inside of the flue gas inlet pipe (2) is slidably connected with a filter screen (7), the transverse movement amount of the filter screen (7) inside the flue gas inlet pipe (2) represents the flow of flue gas flowing in the flue gas inlet pipe (2) within a certain time, thereby controlling the corresponding ammonia water discharge amount.
2. The automatic ammonia feeding device for ammonia desulfurization according to claim 1, characterized in that: The top of the flue gas inlet pipe (2) is provided with a limiting hole (9), and the top of the filter screen (7) is fixedly connected with a sliding block (10), the top of the sliding block (10) extends out of the flue gas inlet pipe (2) and is slidably connected with the inner wall of the limiting hole (9).
3. The automatic ammonia feeding device for ammonia desulfurization according to claim 2, characterized in that: The top of the flue gas inlet pipe (2) is provided with a protection box (8), and the left inner wall of the protection box (8) is fixedly connected with a distance sensor (13) for detecting the transverse movement amount of the sliding block (10), the distance sensor (13) transmits signals to the controller (5), so that the controller (5) controls the flow of the water pump (4) according to the movement amount.
4. The automatic ammonia feeding device for ammonia desulfurization according to claim 3, characterized in that: The left and right sides of the sliding block (10) are respectively fixedly connected with a first baffle (11) and a second baffle (12), and the first baffle (11) and the second baffle (12) extend out of the protection box (8) and are slidably connected with the protection box (8).
5. The automatic ammonia feeding device for ammonia desulfurization according to claim 4, characterized in that: The lengths of the first baffle (11) and the second baffle (12) are greater than the length of the limiting hole (9), and the widths of the first baffle (11) and the second baffle (12) are greater than the width of the limiting hole (9).
6. The automatic ammonia feeding device for ammonia desulfurization according to claim 5, characterized in that: The inside of the protection box (8) is transversely fixedly connected with a positioning rod (16), the sliding block (10) is slidably connected with the positioning rod (16), and the sliding block (10) and the protection box (8) are fixedly connected with a spring (17), and the spring (17) is movably sleeved on the outside of the positioning rod (16).
7. The automatic ammonia feeding device for ammonia desulfurization according to claim 6, characterized in that: The inside of the flue gas inlet pipe (2) is provided with a motor (14), and the output shaft end of the motor (14) is fixedly connected with an eccentric block (15), the eccentric block (15) is eccentrically rotated to knock the reset filter screen (7), so as to avoid that the transverse movement amount of the filter screen (7) is too large due to the blockage of the filter screen (7).