Monitoring device for centralized control of thermal power plant

Abstract

The utility model relates to a monitoring device for centralized control of a thermal power plant, which comprises a filter box, a filter part for treating waste gas is arranged in the filter box, a circulating part for circulating gas is arranged on the upper surface of the filter box, a drying box is arranged above the filter box, and the drying box is provided with a water inlet and a water outlet. A drying assembly for treating water vapor is arranged in the drying box, the upper surface of the drying box is communicated with an air inlet pipeline, the lower surface of the drying box is communicated with an exhaust pipeline, the other end of the exhaust pipeline extends into the filter box, and a plurality of first fans are fixedly mounted on the inner wall of the exhaust pipeline. According to the monitoring device for centralized control of the thermal power plant, by arranging the drying assembly, water vapor in waste gas can be conveniently absorbed, fan blades of the first draught fan in the exhaust pipeline are prevented from being smashed by sulfur dioxide gas and the water vapor, the service life of the first draught fan is prolonged, and the practicability of the monitoring device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas monitoring in thermal power plants, in particular to a monitoring device for centralized control of thermal power plants. Background Art

[0002] In the past, most small thermal power plants were controlled by the main pipe, with separate machines, boilers, and electricity. Large and medium-sized thermal power plants all use unit-type units, that is, one generator is equipped with one boiler and one steam turbine. The machines, boilers, and electricity are managed in a unified manner, that is, centralized control. The machines, boilers, and electricity are all operated on the DCS in the main control room. The power outage and power supply are all operated by the centralized control duty officer. Operation adjustment mainly monitors and adjusts boiler combustion to provide stable and efficient steam for the steam turbine. Centralized control operation is responsible for normal production and commissioning and shutdown of equipment, and arranges safety measures proposed by maintenance. It is not responsible for equipment maintenance, but it must arrange safety measures for all maintenance. Auxiliary control operation generally includes fuel operation, chemical operation, ash removal operation, and desulfurization operation. Auxiliary control operation serves centralized control operation.

[0003] However, most of the existing thermal power plants do not re-inspect the air after desulfurization and ash removal, so the staff cannot adjust the parameters in time, which easily causes the leakage of pollutants and poses a threat to the environment.

[0004] Chinese patent CN215263402U discloses a real-time monitoring device for centralized control of operating parameters of thermal power plants. The utility model fixes the device behind the dust removal operation and desulfurization operation through a support seat, and then drives the first fan blade to rotate through the motor output shaft..., thereby reducing the pollution of gas caused by incomplete desulfurization and dust removal.

[0005] However, in the process of thermal power generation, coal combustion generates a large amount of heat energy, part of which is used by the power plant and converted into electrical energy, and the other part is converted into water vapor, so that a large amount of water vapor is mixed in the exhaust gas. In general, thermal power plants do not treat the water vapor during desulfurization treatment, so that a large amount of water vapor is still mixed in the purified gas. When the sulfur dioxide gas in the purified gas is not completely filtered out, the sulfur dioxide gas is easily combined with water vapor, thereby corroding the surface of the first fan blade in the utility model, which greatly reduces the service life of the first fan blade. As a result, the staff needs to frequently replace the first fan blade, which is too troublesome and causes unnecessary economic expenditure. Therefore, the utility model is proposed to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a monitoring device for centralized control of a thermal power plant, which has the advantages of being easy to process water vapor in the gas.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a monitoring device for centralized control of a thermal power plant, comprising a filter box, a filter element for treating exhaust gas is arranged inside the filter box, a circulation element for circulating gas is arranged on the upper surface of the filter box, a drying box is arranged above the filter box, a drying component for treating water vapor is arranged inside the drying box, an air intake duct is connected to the upper surface of the drying box, an exhaust duct is connected to the lower surface of the drying box, the other end of the exhaust duct extends to the interior of the filter box, and a plurality of first fans are fixedly installed on the inner wall of the exhaust duct.

[0008] The drying component includes a stirring member arranged inside a drying box, a desiccant is arranged on the surface of the stirring member, an opening is provided on the front of the drying box and below the desiccant, a filter screen is provided inside the drying box and extends to the outside of the drying box through the opening, and a box cover is hinged on the upper surface of the drying box and located on the right side of the air inlet duct.

[0009] Furthermore, the stirring element includes a protective box fixedly mounted on one side surface of the drying box, a motor fixedly mounted on the inner wall of the protective box, a rotating shaft extending into the interior of the drying box and rotatably connected to the inner wall of the drying box at one end is fixedly mounted on the output end of the motor, and a plurality of stirring rods are fixedly mounted on the surface of the rotating shaft.

[0010] Furthermore, the filter screen plate includes a filter screen arranged inside the drying box, one end of the filter screen extends to the outside of the drying box through an opening and is fixedly installed with a mounting plate, one end of the mounting plate is in close contact with the surface of the drying box, and a first socket is fixedly installed on the two inner walls of the drying box and on the lower surface of the rotating shaft, and the two ends of the filter screen are plugged into the corresponding first sockets.

[0011] Furthermore, the filter element includes a partition fixedly mounted on the inner wall of the filter box, a through opening is opened on the surface of the partition, a second holder is fixedly mounted on the right surface of the partition and the right inner wall of the filter box, a moisture-absorbing cotton plate is inserted between the two second holders, the left surface of the filter box is connected to a liquid inlet pipe, a valve is fixedly mounted on the liquid inlet pipe, the right surface of the filter box is connected to an air outlet pipe, a first one-way solenoid valve is fixedly mounted on the air outlet pipe.

[0012] Furthermore, a sulfur dioxide detector is fixedly installed on the inner bottom wall of the filter box and located on the right side of the partition.

[0013] Furthermore, a box door is hingedly connected to the front of the filter box and located on the right side of the partition, and an observation window is fixedly installed on the front of the filter box and located on the left side of the partition.

[0014] Furthermore, the circulation part includes a placement box fixedly mounted on the upper surface of the filter box, a second fan is fixedly mounted on the inner wall of the placement box, the left side of the placement box is connected to a first air pipeline, the other end of which extends to the interior of the filter box and is located on the left side of the partition, the right side of the placement box is connected to a second air pipeline, the other end of which extends to the interior of the filter box and is located on the right side of the partition, the second air pipeline is located below the second seat, and a second one-way solenoid valve is fixedly mounted on the second air pipeline.

[0015] Compared with the prior art, the utility model provides a monitoring device for centralized control of a thermal power plant, which has the following beneficial effects:

[0016] 1. The monitoring device of the centralized control of the thermal power plant is convenient for absorbing water vapor in the exhaust gas by setting a drying component, thereby avoiding the fan blades of the first fan in the exhaust duct from being crushed by sulfur dioxide gas and water vapor, thereby increasing the service life of the first fan and improving the practicality of the utility model.

[0017] 2. The monitoring device of the thermal power plant's centralized control facilitates repeated extraction of incompletely purified sulfur dioxide in the exhaust gas through circulation components, thereby filtering the exhaust gas at multiple locations, thus avoiding the leakage of incompletely treated sulfur dioxide gas in the exhaust gas, which would pose a threat to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a partial internal cross-sectional view of the drying box of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the filter screen plate of the utility model;

[0021] Figure 4 This is a front view of the filter box of the utility model.

[0022] In the figure: 1. filter box; 2. drying box; 3. air inlet duct; 4. exhaust duct; 5. first fan; 6. desiccant; 7. motor; 8. rotating shaft; 9. stirring rod; 10. filter screen; 11. mounting plate; 12. first holder; 13. partition; 14. second holder; 15. moisture-absorbing cotton board; 16. liquid inlet duct; 17. air outlet duct; 18. first one-way solenoid valve; 19. sulfur dioxide detector; 20. box door; 21. placement box; 22. second fan; 23. first gas pipeline; 24. second gas pipeline; 25. second one-way solenoid valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 A monitoring device for centralized control of a thermal power plant in this embodiment includes a filter box 1, a filter element for treating exhaust gas is arranged inside the filter box 1, a circulation element for circulating gas is arranged on the upper surface of the filter box 1, a drying box 2 is arranged above the filter box 1, a drying component for treating water vapor is arranged inside the drying box 2, an air intake pipe 3 is connected to the upper surface of the drying box 2, an exhaust pipe 4 is connected to the lower surface of the drying box 2, the other end of the exhaust pipe 4 extends to the inside of the filter box 1, and a plurality of first fans 5 are fixedly installed on the inner wall of the exhaust pipe 4.

[0025] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the drying component includes a stirring member arranged inside the drying box 2, a desiccant 6 is arranged on the surface of the stirring member, an opening is provided on the front of the drying box 2 and below the desiccant 6, a filter screen is provided inside the drying box 2 and extends to the outside of the drying box 2 through the opening, and a box cover is hinged on the upper surface of the drying box 2 and located on the right side of the air inlet duct 3.

[0026] The box cover is provided to facilitate the staff to add the desiccant 6 into the drying box 2 and replace the desiccant 6 .

[0027] The stirring member includes a protective box fixedly mounted on the surface of one side of the drying box 2, a motor 7 fixedly mounted on the inner wall of the protective box, a rotating shaft 8 extending to the inside of the drying box 2 and rotatably connected to the inner wall of the drying box 2 at one end fixedly mounted on the output end of the motor 7, and a plurality of stirring rods 9 fixedly mounted on the surface of the rotating shaft 8. The motor 7 drives the stirring rods 9 to rotate through the rotating shaft 8, so that the stirring rods 9 stir the desiccant 6, and through stirring, the desiccant 6 can be more evenly distributed in the air, thereby increasing its contact area with water vapor, thereby increasing the absorption speed of the desiccant 6.

[0028] Secondly, the filter screen plate includes a filter screen 10 disposed inside the drying box 2, one end of the filter screen 10 extends through the opening to the outside of the drying box 2 and is fixedly mounted with a mounting plate 11, one end of the mounting plate 11 is in close contact with the surface of the drying box 2, and first holders 12 are fixedly mounted on the two inner walls of the drying box 2 and on the lower surface of the rotating shaft 8, and both ends of the filter screen 10 are plugged into the corresponding first holders 12. By providing the filter screen 10, the desiccant 6 is easily blocked, and the desiccant 6 is prevented from entering the exhaust duct 4.

[0029] See also Figure 1 and Figure 4 In this embodiment, the filter element includes a partition 13 fixedly mounted on the inner wall of the filter box 1, a through opening is opened on the surface of the partition 13, a second holder 14 is fixedly mounted on the right surface of the partition 13 and the right inner wall of the filter box 1, a moisture-absorbing cotton plate 15 is inserted between the two second holders 14, a liquid inlet pipe 16 is connected to the left surface of the filter box 1, a valve is fixedly mounted on the liquid inlet pipe 16, an air outlet pipe 17 is connected to the right surface of the filter box 1, and a first one-way solenoid valve 18 is fixedly mounted on the air outlet pipe 17.

[0030] It should be noted that the liquid inlet pipe 16 can be used as a liquid outlet pipe.

[0031] A sulfur dioxide detector 19 is fixedly installed on the inner bottom wall of the filter box 1 and located on the right side of the partition 13. A box door 20 is hinged on the front of the filter box 1 and located on the right side of the partition 13, and an observation window is fixedly installed on the front of the filter box 1 and located on the left side of the partition 13. The box door 20 is provided to facilitate replacement of the moisture-absorbing cotton board 15 and the sulfur dioxide detector 19.

[0032] It should be noted that the sulfur dioxide detector 19 is a prior art, and its specific structure and working principle are not described in detail herein.

[0033] Example 2: Please refer to Figure 1 In this embodiment, the circulation part includes a placement box 21 fixedly mounted on the upper surface of the filter box 1, a second fan 22 is fixedly mounted on the inner wall of the placement box 21, a first gas pipeline 23 is connected to the left side of the placement box 21, the other end of which extends to the inside of the filter box 1 and is located on the left side of the partition 13, and a second gas pipeline 24 is connected to the right side of the placement box 21, the other end of which extends to the inside of the filter box 1 and is located on the right side of the partition 13. The second gas pipeline 24 is located below the second holder 14, and a second one-way solenoid valve 25 is fixedly mounted on the second gas pipeline 24.

[0034] When the sulfur dioxide detector 19 detects that the gas still contains sulfur dioxide gas, the second one-way solenoid valve 25 is opened and the second fan 22 is started, so that the gas re-enters the clean water through the second gas pipeline 24 and the first gas pipeline 23, thereby performing secondary filtration on the sulfur dioxide gas.

[0035] The working principle of the above embodiment is as follows: when the air intake pipe 3 starts to transport the exhaust gas, the motor 7 is turned on, thereby driving the stirring rod 9 to rotate through the rotating shaft 8, so that the stirring rod 9 stirs the desiccant 6. Through stirring, the desiccant 6 can be more evenly distributed in the air, thereby increasing its contact area with water vapor, thereby increasing the absorption speed of the desiccant 6, avoiding the corrosion of the fan blades on the first fan 5 by the sulfur dioxide gas and water vapor in the exhaust gas, and increasing the service life of the first fan 5. When the exhaust gas enters the filter box 1 through the exhaust pipe 4, the sulfur dioxide gas in the exhaust gas is removed by clean water, and the moisture-absorbing cotton board is used to absorb the sulfur dioxide gas. 15 removes water vapor. When the sulfur dioxide detector 19 detects that the exhaust gas still contains sulfur dioxide gas, the second fan 22 is started and the second one-way solenoid valve 25 is opened, so that the gas re-enters the clean water through the second gas pipeline 24 and the first gas pipeline 23, thereby performing a secondary filtration on the sulfur dioxide gas until the sulfur dioxide detector 19 detects no sulfur dioxide gas. At this time, the second one-way solenoid valve 25 is closed and the first one-way solenoid valve 18 is opened to discharge the purified gas, thereby repeatedly filtering the exhaust gas, avoiding the leakage of untreated sulfur dioxide gas in the exhaust gas, which would pose an environmental threat.

[0036] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the text.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for centralized control of a thermal power plant, comprising a filter box (1), characterized in that: A filter element for treating exhaust gas is arranged inside the filter box (1), a circulation element for circulating gas is arranged on the upper surface of the filter box (1), a drying box (2) is arranged above the filter box (1), a drying component for treating water vapor is arranged inside the drying box (2), an air intake pipe (3) is connected to the upper surface of the drying box (2), an exhaust pipe (4) is connected to the lower surface of the drying box (2), the other end of the exhaust pipe (4) extends to the inside of the filter box (1), and a plurality of first fans (5) are fixedly mounted on the inner wall of the exhaust pipe (4); The drying assembly comprises a stirring member arranged inside a drying box (2), a desiccant (6) being arranged on the surface of the stirring member, an opening being arranged on the front of the drying box (2) and below the desiccant (6), a filter screen extending through the opening to the outside of the drying box (2) being arranged inside the drying box (2), and a box cover being hingedly connected on the upper surface of the drying box (2) and located on the right side of the air inlet duct (3).

2. A monitoring device for centralized control of a thermal power plant according to claim 1, characterized in that: The stirring member comprises a protective box fixedly mounted on a side surface of a drying box (2), a motor (7) fixedly mounted on the inner wall of the protective box, a rotating shaft (8) extending into the interior of the drying box (2) and having one end rotatably connected to the inner wall of the drying box (2) fixedly mounted on the output end of the motor (7), and a plurality of stirring rods (9) fixedly mounted on the surface of the rotating shaft (8).

3. A monitoring device for centralized control of a thermal power plant according to claim 2, characterized in that: The filter screen plate comprises a filter screen (10) arranged inside a drying box (2); one end of the filter screen (10) extends to the outside of the drying box (2) through an opening and is fixedly mounted with a mounting plate (11); one end of the mounting plate (11) is in close contact with the surface of the drying box (2); first holders (12) are fixedly mounted on two inner walls of the drying box (2) and located on the lower surface of the rotating shaft (8); and the two ends of the filter screen (10) are plugged into the corresponding first holders (12).

4. A monitoring device for centralized control of a thermal power plant according to claim 1, characterized in that: The filter element comprises a partition (13) fixedly mounted on the inner wall of the filter box (1), a through opening being provided on the surface of the partition (13), a second holder (14) being fixedly mounted on the right side surface of the partition (13) and the right side inner wall of the filter box (1), a moisture absorbing cotton plate (15) being inserted between the two second holders (14), a liquid inlet pipe (16) being connected to the left side surface of the filter box (1), a valve being fixedly mounted on the liquid inlet pipe (16), an air outlet pipe (17) being connected to the right side surface of the filter box (1), a first one-way solenoid valve (18) being fixedly mounted on the air outlet pipe (17).

5. A monitoring device for centralized control of a thermal power plant according to claim 4, characterized in that: A sulfur dioxide detector (19) is fixedly mounted on the inner bottom wall of the filter box (1) and located on the right side of the partition (13).

6. A monitoring device for centralized control of a thermal power plant according to claim 4, characterized in that: A box door (20) is hingedly connected to the front of the filter box (1) and located on the right side of the partition (13), and an observation window is fixedly installed on the front of the filter box (1) and located on the left side of the partition (13).

7. A monitoring device for centralized control of a thermal power plant according to claim 4, characterized in that: The circulation component comprises a placement box (21) fixedly mounted on the upper surface of the filter box (1); a second fan (22) is fixedly mounted on the inner wall of the placement box (21); the left side of the placement box (21) is connected to a first air pipeline (23) whose other end extends into the interior of the filter box (1) and is located on the left side of the partition (13); the right side of the placement box (21) is connected to a second air pipeline (24) whose other end extends into the interior of the filter box (1) and is located on the right side of the partition (13); the second air pipeline (24) is located below the second holder (14); and a second one-way solenoid valve (25) is fixedly mounted on the second air pipeline (24).

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