Adjustable flue gas desulfurization spraying device for thermal power plant

Abstract

The utility model discloses an adjustable flue gas desulfurization spraying device for a thermal power plant, which relates to the technical field of flue gas treatment of the thermal power plant and comprises a desulfurization tower body, an air inlet pipe is fixedly communicated with an opening at the lower end of the desulfurization tower body, and an air outlet pipe is fixedly communicated with an opening at the upper end of the desulfurization tower body. And a slurry storage tank is arranged on the rear side of the desulfurization tower body. According to the utility model, the stepping motor drives the rotary drum rod to rotate, and the rotary encoder is combined to monitor the rotation angle in real time, so that the spraying angle of the spraying head can be accurately adjusted from 0 to 360 degrees, and the control system automatically adjusts the spraying angle according to the flue gas flow and concentration data detected by the flue gas parameter sensor and the feedback data of the tail gas detection sensor; a flow field turbulence area in the tower is covered in a targeted manner, and a spraying dead angle is effectively eliminated, so that flue gas is in full contact with desulfurizer slurry.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of flue gas treatment technology of thermal power plant, especially to a adjustable flue gas desulfurization spraying device for thermal power plant. BACKGROUND

[0002] In the production process of thermal power plant, coal combustion will produce a large amount of flue gas containing sulfur dioxide, if direct emission will cause serious air pollution, therefore must carry out desulfurization treatment to flue gas. Spraying method is the widely used flue gas desulfurization technology at present, its core is that through the spraying device, desulfurizer slurry is atomized and fully contacts with flue gas, realizes the absorption purification of sulfur dioxide.

[0003] But in prior art, spraying device exposes many key defects in actual operation, it is difficult to take into account desulfurization efficiency and operation economy: the low adjustment precision cannot accurately match the spraying amount according to the real-time change of flue gas flow, sulfur dioxide concentration, when flue gas load fluctuates greatly, it is easy to appear the problem of desulfurizer waste or desulfurization efficiency not up to standard, secondly, spraying coverage is uneven, there are spraying dead angles in partial areas, lead to insufficient contact of flue gas and desulfurizer, affect the overall desulfurization effect, therefore, an adjustable flue gas desulfurization spraying device for thermal power plant is provided. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the prior art existing problem, and proposes an adjustable flue gas desulfurization spraying device for thermal power plant.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: an adjustable flue gas desulfurization spraying device for thermal power plant, including the desulfurization tower body, the lower end opening of the desulfurization tower body is fixedly connected with the inlet pipe, the upper end opening of the desulfurization tower body is fixedly connected with the outlet pipe, the rear side of the desulfurization tower body is provided with slurry storage tank, one end of the desulfurization tower body is installed with support seat, the front end of support seat is installed with control system, the inside rotation of the desulfurization tower body is installed with rotary drum rod, the inner wall of inlet pipe is installed with flue gas parameter sensor, the inner wall of outlet pipe is installed with tail gas detection sensor, the outer wall of rotary drum rod is installed with fixed seat, the lower end of fixed seat is installed with multiple groups of spray head, one end opening of rotary drum rod is fixedly connected with rotary connector pipe, the lower end of electromagnetic valve is fixedly connected with vertical pipe, the other end of desulfurization tower body is installed with support frame, the lower end of support frame is installed with pump body, the outlet end of pump body is fixedly connected with L-shaped pipe, the upper end of support seat is installed with step motor, the outer wall of rotary drum rod is fixedly installed with rotary encoder.

[0006] Preferably, the other end of the desulfurization tower body is provided with two groups of support plates, the upper ends of the plurality of groups of spray heads are fixedly connected with the outer wall openings of the rotating drum rod, and the liquid inlet end of the pump body is fixedly connected with the liquid outlet end of the slurry storage tank.

[0007] Preferably, the outer wall of the vertical pipe is fixed with the inner walls of the two groups of support plates, the upper end of the L-shaped pipe is fixedly connected with the lower end of the vertical pipe, and the electromagnetic valve and the pump body are signal-connected with the control system.

[0008] Preferably, the upper end of the slurry storage tank is provided with a liquid level sensor, and the upper end of the slurry storage tank is provided with a stirring assembly.

[0009] Preferably, part of the liquid level sensor is arranged in the interior of the slurry storage tank, part of the stirring assembly is arranged in the interior of the slurry storage tank, and the liquid level sensor and the stirring assembly are signal-connected with the control system.

[0010] Preferably, the outer wall of the rotating drum rod is rotatably provided with a sealing seat, and one end of each of the two groups of sealing seats is fixed with the two ends of the desulfurization tower body.

[0011] Preferably, the other end of the rotating drum rod is fixed with the output end of the stepping motor, and the stepping motor and the rotary encoder are signal-connected with the control system.

[0012] Compared with the prior art, the utility model has the advantages and positive effects that:

[0013] 1、The utility model discloses a spraying angle is dynamically adjustable, and desulfurization efficiency is more stable: through the stepping motor drive rotating drum rod rotation, combination rotary encoder real -time monitoring to rotation angle, can realize 0 - 360 accurate regulation of spraying head spraying angle, and control system according to the smoke flow, concentration data of smoke parameter sensor detection and the feedback data of tail gas detection sensor, automatically adjust the spraying angle, and the pertinence covers the flow field disorder area in the tower, effectively eliminates the dead angle of spraying, makes the smoke and desulfurizer slurry fully contact.

[0014] 2、The utility model discloses a sealing performance is reliable, prolongs equipment service life: rotating drum rod and rotary pipe connection place adopts the sealing rotary joint, and the connecting place with desulfurization tower body adopts double -end face mechanical sealing seat, and double -deck sealing structure effectively solves the slurry leakage problem of traditional rotary spraying device;Meanwhile, the corrosion of slurry to equipment parts is avoided.

[0015] 3、The utility model discloses a precise control reduces consumption, and the operation cost is significantly reduced: control system integrates smoke parameter detection, liquid level detection, angle detection and multiple monitoring module, and through electromagnetic valve accurate control slurry flow, combination stepping motor adjusts the spraying angle, realizes the precise matching of slurry consumption and smoke working condition;Stirring assembly prevents slurry deposition and ensures desulfurization effect, avoids the waste of reagent due to deposition. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic view of the adjustable flue gas desulfurization spraying device for thermal power plants is provided for the utility model;

[0017] Figure 2 A front structure schematic view of the adjustable flue gas desulfurization spraying device for thermal power plants is provided for the utility model;

[0018] Figure 3 A structure schematic view of the slurry storage tank, pump body and L-shaped pipe of the adjustable flue gas desulfurization spraying device for thermal power plants is provided for the utility model;

[0019] Figure 4 A structure schematic view of the rotating drum rod, stepping motor and rotary encoder of the adjustable flue gas desulfurization spraying device for thermal power plants is provided for the utility model.

[0020] Legend: 1, desulfurization tower body; 2, air inlet pipe; 3, air outlet pipe; 4, slurry storage tank; 5, support seat; 6, control system; 7, support frame; 8, rotating drum rod; 9, flue gas parameter sensor; 10, tail gas detection sensor; 11, fixed seat; 12, spraying head; 13, sealing seat; 14, support plate; 15, vertical pipe; 16, electromagnetic valve; 17, rotary connecting pipe; 18, pump body; 19, L-shaped pipe; 20, liquid level sensor; 21, stepping motor; 22, rotary encoder; 23, stirring assembly. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described below in combination with the drawings and examples. It should be noted that the examples and features in the examples of the present application can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from those described herein, therefore, the utility model is not limited to the specific examples disclosed in the following description.

[0023] Example one: as Figure 1 , Figure 2 , Figure 3 and Figure 4The utility model provides a kind of adjustable flue gas desulfurization spraying device for thermal power plant, including desulfurization tower body 1, the lower end opening of desulfurization tower body 1 is fixedly communicated with inlet pipe 2, the upper end opening of desulfurization tower body 1 is fixedly communicated with air outlet pipe 3, the rear side of desulfurization tower body 1 is provided with slurry storage tank 4, one end of desulfurization tower body 1 is equipped with support seat 5, the front end of support seat 5 is equipped with control system 6, the inside of desulfurization tower body 1 is rotatably installed with rotary drum rod 8, the inner wall of inlet pipe 2 is equipped with flue gas parameter sensor 9, the inner wall of air outlet pipe 3 is equipped with tail gas detection sensor 10, the outer wall of rotary drum rod 8 is equipped with fixed seat 11, a plurality of groups of spray head 12 are installed in the lower end of fixed seat 11, the lower end of rotary joint pipe 17 is fixedly communicated with solenoid valve 16, the lower end of solenoid valve 16 is fixedly communicated with standpipe 15, the other end of desulfurization tower body 1 is equipped with support frame 7, the lower end of support frame 7 is equipped with pump body 18, the outlet of pump body 18 is fixedly communicated with L-shaped pipe 19, the other end of desulfurization tower body 1 is equipped with two groups of support plate 14, the upper end of a plurality of groups of spray head 12 is fixedly communicated with the outer wall opening of rotary drum rod 8, the inlet of pump body 18 is fixedly communicated with the outlet of slurry storage tank 4, the outer wall of standpipe 15 is fixed with the inner wall of two groups of support plate 14, the upper end of L-shaped pipe 19 is fixedly communicated with the lower end of standpipe 15, solenoid valve 16 and pump body 18 are signal connected with control system 6.

[0024] The outer wall of rotary drum rod 8 is rotatably installed with sealing seat 13, the upper end of support seat 5 is equipped with step motor 21, the outer wall of rotary drum rod 8 is fixedly installed with rotary encoder 22, one end of two groups of sealing seat 13 is fixed with the two ends of desulfurization tower body 1 respectively, the other end of rotary drum rod 8 is fixed with the output end of step motor 21, step motor 21 and rotary encoder 22 are signal connected with control system 6.

[0025] The specific settings and effects of the present embodiment will be described below, the lower end opening of desulfurization tower body 1 is fixedly communicated with inlet pipe 2, for the sulfur-containing flue gas generated by thermal power plant is introduced into the inside of desulfurization tower body 1;The upper end opening of desulfurization tower body 1 is fixedly communicated with air outlet pipe 3, for clean flue gas after desulfurization is discharged.

[0026] The rear side of desulfurization tower body 1 is provided with slurry storage tank 4, for storing desulfurizer slurry;The outer wall of one end of desulfurization tower body 1 is fixedly installed with support seat 5 by bolt, control system 6 is horizontally installed in the front end of support seat 5, control system 6 adopts PLC integrated control module, for receiving detection signal and outputting control instruction.

[0027] The inside of the desulfurization tower body 1 is horizontally rotatably installed with a rotating drum rod 8, which is a hollow cylindrical metal pipe with its axis perpendicular to the axis of the desulfurization tower body 1, and the two ends of the rotating drum rod 8 respectively penetrate through the two side walls of the desulfurization tower body 1 and extend to the outside; the inner wall of the air inlet pipe 2 is fixedly installed with a flue gas parameter sensor 9 through a support, the flue gas parameter sensor 9 adopts a flue gas analyzer with a model of S700, which is used for real-time detection of the flue gas flow and sulfur dioxide concentration entering the desulfurization tower body 1; the inner wall of the air outlet pipe 3 is fixedly installed with a tail gas detection sensor 10 at the corresponding position through a support, the tail gas detection sensor 10 adopts a sulfur dioxide detector with a model of GH-600, which is used for real-time detection of the sulfur dioxide concentration of the flue gas discharged after desulfurization; the outer wall of the rotating drum rod 8 is uniformly fixedly installed with a plurality of fixing seats 11 along the axis direction, the inside of each fixing seat 11 is in communication with the hollow chamber of the rotating drum rod 8; a plurality of groups of spray heads 12 are installed through the fixing seats 11 along the length direction, the spray heads 12 adopt atomizing nozzle structure, the upper ends of the plurality of groups of spray heads 12 are fixedly communicated with the opening of the outer wall of the rotating drum rod 8, which ensures that the desulfurizing agent slurry can enter the spray heads 12 through the rotating drum rod 8 and be atomized and sprayed out; one end of the rotating drum rod 8 is fixedly communicated with a rotating connector 17 through a flange, the rotating connector 17 adopts a mechanical seal type rotating joint, a Q type spherical seal rotating joint is selected for the model, which ensures that the slurry does not leak when the rotating drum rod 8 rotates; the lower end of the rotating connector 17 is fixedly communicated with an electromagnetic valve 16 through a flange, the electromagnetic valve 16 adopts an electromagnetic flow valve with a model of LDG, which is used for precise control of the slurry flow entering the rotating drum rod 8; the lower end of the electromagnetic valve 16 is fixedly communicated with a vertical pipe 15 through a flange, the vertical pipe 15 is a cylindrical pipeline made of stainless steel.

[0028] The other end of the desulfurization tower body 1 is fixedly installed with a support frame 7 through a bolt, which has good load-bearing stability; the lower end of the support frame 7 is fixedly installed with a pump body 18 through a bolt, the pump body 18 adopts a fluoroplastic centrifugal pump with a model of IHF, the inlet end of which is fixedly communicated with the outlet end of the slurry storage tank 4 through a pipeline, the outlet end is fixedly communicated with an L-shaped pipe 19 through a flange, the upper end of the L-shaped pipe 19 is fixedly communicated with the lower end of the vertical pipe 15 through a flange, forming a complete slurry conveying channel; the other end of the desulfurization tower body 1 is fixedly installed with two groups of support plates 14 through a bolt at the position corresponding to the vertical pipe 15, the inner walls of the two groups of support plates 14 are welded and fixed with the outer wall of the vertical pipe 15, which stably supports the vertical pipe 15.

[0029] Sealing seats 13 are rotatably installed on the outer wall of the rotating drum 8, corresponding to the two side walls of the desulfurization tower body 1. The sealing seats 13 adopt a double-end mechanical seal structure, and the sealing material is fluororubber. One end of the two sets of sealing seats 13 are welded and fixed to the outer walls of the two ends of the desulfurization tower body 1, respectively, to further enhance the sealing performance of the connection between the rotating drum 8 and the desulfurization tower body 1. A stepper motor 21 is fixedly installed on the upper end of the support base 5 by bolts. The stepper motor 21 is a high-precision stepper motor 21 of model 28BYJ-48. Its output end is fixedly connected to the other end of the rotating drum 8 through a coupling, which is used to drive the rotating drum 8 to rotate around the axis. A rotary encoder 22 is fixedly installed on the outer wall of the rotating drum 8 corresponding to the connection position of the stepper motor 21. The rotary encoder 22 is an incremental encoder of model E6B2-CWZ6C, which is used to detect the rotation angle of the rotating drum 8 in real time.

[0030] The solenoid valve 16, pump body 18, stepper motor 21, rotary encoder 22, flue gas parameter sensor 9 and exhaust gas detection sensor 10 are all connected to the control system 6 via wires to realize the transmission of detection data and the execution of control commands.

[0031] Example 2: Figure 1 , Figure 2 and Figure 4 As shown, a liquid level sensor 20 is installed at the upper end of the slurry storage tank 4, and a stirring assembly 23 is installed at the upper end of the slurry storage tank 4. A part of the liquid level sensor 20 is located inside the slurry storage tank 4, and a part of the stirring assembly 23 is located inside the slurry storage tank 4. Both the liquid level sensor 20 and the stirring assembly 23 are connected to the control system 6 via signals.

[0032] The overall effect of this embodiment is that a liquid level sensor 20 is fixedly installed on the upper end of the slurry storage tank 4 by bolts. The liquid level sensor 20 is a submersible liquid level gauge, and its probe extends into the interior of the slurry storage tank 4 to detect the liquid level of the desulfurizing agent slurry in the tank in real time. A stirring assembly 23 is fixedly installed on the upper end of the slurry storage tank 4 at the center position by bolts. The stirring assembly 23 includes a stirring motor, a stirring shaft, and a stirring paddle. The stirring motor is an asynchronous motor of model JBJ. The stirring shaft passes through the top of the slurry storage tank 4 and extends into the interior. The stirring paddle is fixedly installed at the lower end of the stirring shaft to stir the slurry and prevent the desulfurizing agent from settling.

[0033] The level sensor 20 and the stirring assembly 23 are both connected to the control system 6 via wires to realize the transmission of detection data and the execution of control commands;

[0034] The method for using and the working principle of the device are as follows: pretreatment and monitoring: after the desulfurizer slurry is injected into the slurry storage tank 4, the stirring assembly 23 continuously stirs to prevent precipitation, and the liquid level sensor 20 monitors the liquid level in real time; before the sulfur-containing flue gas enters the desulfurization tower through the air inlet pipe 2, the flue gas parameter sensor 9 detects the flow and sulfur dioxide concentration of the flue gas and transmits them to the control system 6;

[0035] Precise spraying control: the control system 6 starts the pump body 18 according to the detection data, the slurry is sent into the rotating barrel 8 through the L-shaped pipe 19, the vertical pipe 15, the electromagnetic valve 16 and the rotating connector 17, and is atomized and sprayed out through the spraying head 12; at the same time, the step motor 21 drives the rotating barrel 8 to rotate, the rotary encoder 22 feeds back the angle in real time, the spraying angle is accurately adjusted to 0-360°, and the electromagnetic valve 16 synchronously controls the slurry flow;

[0036] Closed-loop optimization and emission: the tail gas detection sensor 10 monitors the concentration of the treated flue gas and feeds back to the control system 6 to dynamically optimize the spraying parameters; the slurry after desulfurization falls back and is recovered, the clean flue gas is discharged through the air outlet pipe 3, and the system alarms and prompts to supplement the material when the liquid level is lower than the threshold.

[0037] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belong to the protection scope of the present application.

Claims

1. An adjustable flue gas desulfurization spray device for thermal power plants, comprising a desulfurization tower body (1), characterized in that: The lower opening of the desulfurization tower body (1) is fixedly connected to the air inlet pipe (2), and the upper opening of the desulfurization tower body (1) is fixedly connected to the air outlet pipe (3). A slurry storage tank (4) is provided on the rear side of the desulfurization tower body (1). A support base (5) is installed at one end of the desulfurization tower body (1), and a control system (6) is installed at the front end of the support base (5). A rotating drum rod (8) is rotatably installed inside the desulfurization tower body (1). A flue gas parameter sensor (9) is installed on the inner wall of the air inlet pipe (2), and a tail gas detection sensor (10) is installed on the inner wall of the air outlet pipe (3). A fixing seat (11) is installed on the outer wall of the rotating drum rod (8). Multiple spray heads (12) are installed through the lower end of the fixed base (11). One end of the rotating drum rod (8) is fixedly connected to a rotating pipe (17). The lower end of the rotating pipe (17) is fixedly connected to a solenoid valve (16). The lower end of the solenoid valve (16) is fixedly connected to a vertical pipe (15). The other end of the desulfurization tower body (1) is equipped with a support frame (7). The lower end of the support frame (7) is equipped with a pump body (18). The liquid outlet end of the pump body (18) is fixedly connected to an L-shaped pipe (19). The upper end of the support base (5) is equipped with a stepper motor (21). The outer wall of the rotating drum rod (8) is fixedly equipped with a rotary encoder (22).

2. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 1, characterized in that: Two sets of support plates (14) are installed at the other end of the desulfurization tower body (1). The upper ends of multiple sets of spray heads (12) are fixedly connected to the outer wall opening of the rotating drum rod (8). The inlet end of the pump body (18) is fixedly connected to the outlet end of the slurry storage tank (4).

3. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 2, characterized in that: The outer wall of the vertical pipe (15) is fixed to the inner wall of the two sets of support plates (14), the upper end of the L-shaped pipe (19) is fixedly connected to the lower end of the vertical pipe (15), and the solenoid valve (16) and the pump body (18) are both connected to the control system (6) via signal.

4. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 1, characterized in that: A liquid level sensor (20) is installed at the upper end of the slurry storage tank (4), and a stirring assembly (23) is installed at the upper end of the slurry storage tank (4).

5. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 4, characterized in that: A portion of the liquid level sensor (20) is located inside the slurry storage tank (4), and a portion of the stirring assembly (23) is located inside the slurry storage tank (4). Both the liquid level sensor (20) and the stirring assembly (23) are connected to the control system (6) via signals.

6. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 1, characterized in that: The outer wall of the rotating drum rod (8) is rotatably equipped with a sealing seat (13), and one end of the two sets of sealing seats (13) is fixed to both ends of the desulfurization tower body (1).

7. The adjustable flue gas desulfurization spray device for thermal power plants according to claim 6, characterized in that: The other end of the rotating drum (8) is fixed to the output end of the stepper motor (21), and both the stepper motor (21) and the rotary encoder (22) are connected to the control system (6) via signals.

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