Exhaust gas treatment device for a combustion engine thermal power plant

Abstract

The application provides a waste gas treatment device of a combustion engine thermal power plant, and relates to the technical field of waste gas treatment.The waste gas treatment device comprises a waste gas pretreatment box, one end of the waste gas pretreatment box is connected with a waste gas discharge end of a thermal power plant through a waste gas receiving pipe, the other end of the waste gas pretreatment box is connected with a waste gas purification box through a connecting pipe one, and a waste gas pretreatment mechanism is arranged in the waste gas pretreatment box.The waste gas pretreatment mechanism is arranged, and the waste gas pretreatment mechanism is used for treating the waste gas, so that the technical problem that the traditional combustion waste gas device is prone to insufficient combustion, cannot reach the emission standard and the heat generated by the traditional combustion waste gas device is not usually utilized, thereby causing energy waste is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for a gas turbine power plant. Background Technology

[0002] Gas turbine power plants generate a large amount of waste gas during production, primarily from fuel combustion, boiler emissions, and equipment leaks. This waste gas contains significant amounts of harmful gases such as carbon dioxide, sulfur dioxide, and nitrogen oxides, as well as particulate matter and unburned hydrocarbons.

[0003] However, traditional combustion exhaust gas treatment devices are prone to incomplete combustion, leading to failure to meet emission standards. Furthermore, the heat generated by these devices is often not utilized, resulting in energy waste. Therefore, there is an urgent need to develop an exhaust gas treatment device for gas turbine power plants to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] This invention provides a waste gas treatment device for a gas turbine power plant to solve the technical problems mentioned in the background art: traditional combustion waste gas devices are prone to incomplete combustion, resulting in failure to meet emission standards, and the heat generated by using traditional combustion waste gas devices is usually not utilized, resulting in energy waste.

[0005] To solve the above-mentioned technical problems, the present invention discloses a waste gas treatment device for a gas turbine power plant, comprising: a waste gas pretreatment box, one end of which is connected to the waste gas emission end of the power plant through a waste gas receiving pipe, and the other end of which is connected to a waste gas purification box through a connecting pipe, and a waste gas pretreatment mechanism is provided inside the waste gas pretreatment box.

[0006] Preferably, the exhaust gas pretreatment mechanism includes: a liquid input pipe, which is fixedly installed at the top of the exhaust gas pretreatment box, and a solenoid valve is fixedly installed on the liquid input pipe; a partition is fixedly installed on the inner wall of the exhaust gas pretreatment box; the right end of the partition is fixed to the input end of the gas circulation pipe; the output end of the gas circulation pipe passes through the exhaust gas pretreatment box and is connected to a connecting pipe; the upper and lower ends of the partition are a liquid heating chamber and an exhaust gas combustion chamber, respectively; a liquid output pipe is fixedly installed on the left end of the liquid heating chamber on the exhaust gas pretreatment box, and a solenoid valve is fixedly installed on the liquid output pipe; and an exhaust gas combustion assembly is provided inside the exhaust gas combustion chamber.

[0007] Preferably, the exhaust gas combustion assembly includes: a second partition plate, which is fixedly installed on the inner wall of the left end of the exhaust gas combustion chamber; a third partition plate is fixedly installed on the inner wall of the right end of the exhaust gas combustion chamber at the top of the second partition plate; and an exhaust gas burner is fixedly installed on the outer wall of the left end of the exhaust gas pretreatment box. The upper and lower output ends of the exhaust gas burner are connected to a plurality of nozzles through connecting pipes provided in the first and second partition plates.

[0008] Preferably, the exhaust gas purification box is equipped with an exhaust gas purification mechanism, which includes: a pressurization box, which is fixedly installed on the inner wall of the left end of the exhaust gas purification box, and a piston is slidably connected inside the pressurization box; the top ends of several return springs are fixedly installed on the bottom ends of the pistons, and the bottom ends of the return springs are fixedly installed on the inner wall of the pressurization box; one end of a connecting rope is fixedly installed on the bottom end of the pistons, and the other end of the connecting rope passes through the pressurization box and is connected to the drive assembly; the left end of the pressurization box is connected to a connecting pipe, and a counterflow valve is fixedly installed inside the connecting pipe; one end of the connecting pipe is connected to the pressurization box, and the other end of the connecting pipe is connected to the gas-liquid mixing assembly.

[0009] Preferably, the gas-liquid mixing assembly includes: a mixing chamber, the right end of which is fixedly installed on the inner wall of the right end of the exhaust gas purification chamber; one end of a connecting pipe 4 is connected to the top of the pressurization chamber, and the other end of the connecting pipe 4 is connected to the top of the left side of the mixing chamber, and a counterflow valve 2 is provided inside the connecting pipe 4; a solenoid valve 3 is fixedly installed on the connecting pipe 4; one end of an exhaust pipe is connected to the top of the mixing chamber, and the other end of the exhaust pipe passes through the exhaust gas purification chamber, and a solenoid valve 4 is fixedly installed on the exhaust pipe; an exhaust gas detector is fixedly installed on the inner wall of the top of the mixing chamber; a long pipe is fixedly installed on the inner wall of the bottom end of the mixing chamber, and a plurality of nozzles 2 are provided at the top of the long pipe; the left end of the long pipe is connected to the connecting pipe 3, and a counterflow valve 3 is fixedly installed inside the connecting pipe 3; the top of a rotating shaft is rotatably connected to the inner wall of the mixing chamber, and the bottom end of the rotating shaft passes through the mixing chamber and is connected to the drive assembly; and a plurality of stirring rods are fixedly installed on the rotating shaft.

[0010] Preferably, the drive assembly includes: a forward and reverse drive motor, the fixed end of which is fixedly mounted on a support rod, and a gear one fixedly mounted on the output end of the forward and reverse drive motor. Gear one meshes with rack one, and the top end of rack one is fixedly connected to slider one. Slider one is slidably connected to an L-shaped slide rail. One end of a return spring two is connected to the inner wall of the L-shaped slide rail, and the other end of the return spring two is fixedly mounted on slider one. A pulley is fixedly mounted on the left end of the L-shaped slide rail. One end of a connecting rope is fixedly mounted on slider one, and the other end of the connecting rope is connected to a piston through the pulley. The right end of rack one is connected to rack two through a short rod, and rack two meshes with gear two. Gear two is fixedly mounted on a rotating shaft. The top end of slider two is fixedly mounted on rack two, and the bottom end of slider two is slidably connected to a slide rail. The slide rail is fixedly mounted on the inner wall of the bottom end of the mixing tank.

[0011] Preferably, the exhaust gas burner further includes:

[0012] The first temperature sensor is used to detect the preheating temperature of fuel gas entering the connecting pipe 2 in the exhaust gas burner.

[0013] The second temperature sensor is used to detect the preheating temperature of the fuel gas discharge nozzle in the exhaust gas burner.

[0014] The controller and the alarm are electrically connected to the first temperature sensor, the second temperature sensor, and the alarm.

[0015] Preferably, the controller controls the alarm based on the first temperature sensor and the second temperature sensor, including the following steps:

[0016] Step 1: Based on formula (1) and the detection values ​​of the first and second temperature sensors, calculate the actual heat loss Q of the exhaust gas burner. The controller compares the actual heat loss Q of the exhaust gas burner with the preset heat loss range. When the actual heat loss exceeds the preset heat loss range, the controller activates the alarm.

[0017]

[0018] Where M is the mass of fuel used in the exhaust gas burner, C is the specific heat at constant volume of the fuel in the exhaust gas burner, α is the ratio of the cross-sectional area of ​​nozzle head one to the outlet area of ​​connecting pipe two, and T y The value detected by the first temperature sensor. T represents the combustion efficiency of fuel in an exhaust gas burner. s The value is the temperature detected by the second temperature sensor, Re is the Reynolds number, and λ is the friction coefficient of the fuel in the exhaust gas burner in the second connecting pipe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0021] Figure 2 Provided for embodiments of the present invention Figure 1 Schematic diagram of the internal structure of the waste gas purification box.

[0022] Figure label:

[0023] 1. Exhaust gas pretreatment box; 2. Exhaust gas receiving pipe; 3. Connecting pipe one; 4. Exhaust gas purification box; 5. Liquid input pipe; 6. Solenoid valve one; 7. Baffle one; 8. Gas circulation pipe; 9. Liquid output pipe; 10. Liquid heating chamber; 11. Solenoid valve two; 12. Exhaust gas combustion chamber; 13. Baffle two; 14. Baffle three; 15. Exhaust gas burner; 16. Nozzle one; 17. Connecting pipe two; 18. Pressurization box; 19. Piston; 20. Return spring one; 21. Connecting rope; 22. Backflow valve one; 23. Connecting pipe three; 24. 25. Mixing box; 26. Connecting pipe 4; 27. Reverse flow valve 2; 28. Solenoid valve 3; 29. ​​Exhaust pipe; 30. Solenoid valve 4; 31. Exhaust gas detector; 32. Long pipe; 33. Nozzle 2; 34. Reverse flow valve 3; 35. Rotating shaft; 36. Stirring rod; 37. Forward and reverse drive motor; 38. Support rod; 39. Gear 1; 40. Rack 1; 41. Slider 1; 42. L-shaped slide rail; 43. Return spring 2; 44. Pulley; 45. Short rod; 46. Rack 2; 47. Gear 2; 48. Slider 2; 49. Slider 2; 40. Slider rail. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] The present invention provides the following embodiments.

[0027] Example 1

[0028] This invention provides a waste gas treatment device for gas turbine power plants, such as... Figure 1As shown, a waste gas treatment device for a gas turbine power plant includes: a waste gas pretreatment box 1, one end of which is connected to the waste gas emission end of the power plant via a waste gas receiving pipe 2, and the other end of which is connected to a waste gas purification box 4 via a connecting pipe 3. A waste gas pretreatment mechanism is provided inside the waste gas pretreatment box 1.

[0029] The beneficial effects of the above technical solution are as follows: By setting up an exhaust gas pretreatment mechanism, and having the exhaust gas pretreatment mechanism treat the exhaust gas, the present invention effectively improves the technical problems mentioned in the background art: traditional combustion exhaust gas devices are prone to incomplete combustion, resulting in failure to meet emission standards, and the heat generated by using traditional combustion exhaust gas devices is usually not utilized, resulting in energy waste.

[0030] Example 2

[0031] Based on Example 1, such as Figure 1 As shown, the exhaust gas treatment device for a gas turbine power plant includes an exhaust gas pretreatment mechanism comprising: a liquid input pipe 5, which is fixedly installed at the top of the exhaust gas pretreatment box 1, and a solenoid valve 6 is fixedly installed on the liquid input pipe 5; a partition 7 is fixedly installed on the inner wall of the exhaust gas pretreatment box 1, the right end of the partition 7 is fixed to the input end of a gas circulation pipe 8, the output end of the gas circulation pipe 8 passes through the exhaust gas pretreatment box 1 and is connected to a connecting pipe 3; the upper and lower ends of the partition 7 are a liquid heating chamber 10 and an exhaust gas combustion chamber 12, respectively; a liquid output pipe 9 is fixedly installed on the left end of the liquid heating chamber 10 on the exhaust gas pretreatment box 1, and a solenoid valve 11 is fixedly installed on the liquid output pipe 9; and an exhaust gas combustion assembly is provided inside the exhaust gas combustion chamber 12.

[0032] Optionally, the exhaust gas combustion assembly includes: a second partition 13, which is fixedly installed on the inner wall of the left end of the exhaust gas combustion chamber 12; a third partition 14, which is fixedly installed on the inner wall of the right end of the exhaust gas combustion chamber 12 at the top of the second partition 13; and an exhaust gas burner 15 (working principle: exhaust gas is introduced and incinerated at high temperature. The burner in the combustion chamber will burn fuel to generate a high-temperature flame, causing the exhaust gas to decompose at high temperature, thereby effectively destroying harmful substances in the exhaust gas) which is fixedly installed on the outer wall of the left end of the exhaust gas pretreatment box 1. The upper and lower output ends of the exhaust gas burner 15 are connected to several nozzles 16 through the connecting pipes 17 provided in the first partition 7 and the second partition 13.

[0033] The working principle of the above technical solution is as follows: By connecting the exhaust gas receiving pipe 2 to the exhaust gas emission end of the thermal power plant, and then by opening the solenoid valve 6, water is transported from the liquid input pipe 5 to the liquid heating chamber 10 through the liquid delivery pipe. Then, the solenoid valve 6 is closed, and the exhaust gas burner 15 is started at the same time. The exhaust gas burner 15 delivers fuel to the delivery ends of several nozzles 16. Then, the exhaust gas is transported through the partitions. At the same time, the unburned combustible gas in the exhaust gas is fully burned under the action of the exhaust gas burner 15. Then, the high-temperature gas is transported to the exhaust gas purification box 4 through the gas circulation pipe 8 and the connecting pipe 3. When the exhaust gas heats the liquid in the liquid heating chamber 10 to a certain temperature, the solenoid valve 11 is opened, and the heated water is output through the liquid output pipe 9.

[0034] The beneficial effects of the above technical solution are as follows: by setting up the exhaust gas burner 15 and several nozzles 16, it is beneficial to effectively burn the exhaust gas and effectively burn the unburned exhaust gas, preventing the exhaust gas from being directly discharged into the air and polluting the environment; by setting up the gas circulation pipe 8 and the liquid heating chamber 10, the water stored in the liquid heating chamber 10 is effectively heated by circulating the burned exhaust gas; by setting up the liquid input pipe 5 and the liquid output pipe 9, it is convenient and practical to realize the input and discharge of heated water.

[0035] Example 3

[0036] Based on Embodiments 1-2, a waste gas treatment device for a gas turbine power plant is provided. The waste gas purification box 4 is equipped with a waste gas purification mechanism. The waste gas purification mechanism includes: a pressurization box 18, which is fixedly installed on the inner wall of the left end of the waste gas purification box 4. A piston 19 is slidably connected inside the pressurization box 18. The top ends of several return springs 20 are fixedly installed on the bottom ends of the piston 19, and the bottom ends of the return springs 20 are fixedly installed on the inner wall of the pressurization box 18. One end of a connecting rope 21 is fixedly installed on the bottom end of the piston 19, and the other end of the connecting rope 21 passes through the pressurization box 18 and is connected to the drive assembly. The left end of the pressurization box 18 is connected to a connecting pipe 3, and a counterflow valve 22 is fixedly installed inside the connecting pipe 3. One end of a connecting pipe 23 is connected to the pressurization box 18, and the other end of the connecting pipe 23 is connected to a gas-liquid mixing assembly.

[0037] Optionally, the gas-liquid mixing assembly includes: a mixing chamber 24, the right end of which is fixedly installed on the inner wall of the right end of the exhaust gas purification chamber 4 (the mixing chamber 24 is equipped with a gas chemical treatment liquid); one end of a connecting pipe 25 is connected to the top of the pressurization chamber 18, and the other end of the connecting pipe 25 is connected to the top left side of the mixing chamber 24; a backflow valve 26 is installed inside the connecting pipe 25; a solenoid valve 27 is fixedly installed on the connecting pipe 25; one end of an exhaust pipe 28 is connected to the top of the mixing chamber 24, and the other end of the exhaust pipe 28 passes through the exhaust gas purification chamber 4. Furthermore, an electromagnetic valve 29 is fixedly installed on the exhaust pipe 28, an exhaust gas detector 30 is fixedly installed on the inner wall of the top of the mixing box 24, a long pipe 31 is fixedly installed on the inner wall of the bottom of the mixing box 24, and a number of nozzles 32 are provided at the top of the long pipe 31. The left end of the long pipe 31 is connected to the connecting pipe 23, and a counterflow valve 33 is fixedly installed inside the connecting pipe 23. The top of the rotating shaft 34 is rotatably connected to the inner wall of the mixing box 24, and the bottom end of the rotating shaft 34 passes through the mixing box 24 and is connected to the drive assembly. A number of stirring rods 35 are fixedly installed on the rotating shaft 34.

[0038] Optionally, the drive assembly includes: a forward and reverse drive motor 36, the fixed end of which is fixedly mounted on a support rod 37, and a gear 38 fixedly mounted on the output end of the forward and reverse drive motor 36. The gear 38 meshes with a rack 39, and the top end of the rack 39 is fixedly connected to a slider 40. The slider 40 is slidably connected to an L-shaped slide rail 41. One end of a return spring 42 is connected to the inner wall of the L-shaped slide rail 41, and the other end of the return spring 42 is fixedly mounted on the slider 40. Wheel 43 is fixedly installed on the left end of L-shaped slide rail 41. One end of connecting rope 21 is fixedly installed on slider 40, and the other end of connecting rope 21 is connected to piston 19 through pulley 43. The right end of rack 39 is connected to rack 45 through short rod 44, and rack 45 is meshed with gear 46. Gear 46 is fixedly installed on rotating shaft 34. The top end of slider 47 is fixedly installed on rack 45, and the bottom end of slider 47 is slidably connected to slide rail 48. Slide rail 48 is fixedly installed on the inner wall of bottom end of mixing box 24.

[0039] The working principle of the above technical solution is as follows: By starting the forward and reverse drive motor 36, the forward and reverse drive motor 36 drives the rack 39 meshing with it to move left and right. The left and right movement of the rack 39 drives the slider 40 fixedly connected to it to slide left and right on the L-shaped slide rail 41. The left and right movement of the slider 40 drives the connecting rope 21 fixedly connected to it to drive the piston 19 to move up and down. At the same time, the left and right movement of the rack 39 drives the L-shaped slide rail 41 and the rack 45 fixedly connected to it to move left and right. The left and right movement of the rack 45 drives the gear 46 meshing with it to rotate. The rotation of the gear 46 drives the rotating shaft 34 fixedly connected to it to rotate. The rotation of the rotating shaft 34 drives several stirring rods 35 to rotate forward and backward. When the piston 19 moves downward... The exhaust gas is transported through connecting pipe 3 to piston 19. When piston 19 moves upward, the exhaust gas in pressurization box 18 is transported through connecting pipe 23 to mixing box 24 (at this time, solenoid valve 27 is closed). The exhaust gas in connecting pipe 23 is sprayed out through long pipe 31 and several nozzles 32. When exhaust gas detector 30 detects that the exhaust gas in mixing box 24 meets the emission standards, solenoid valve 29 is opened to discharge the exhaust gas through exhaust pipe 28. When exhaust gas detector 30 detects that the exhaust gas in mixing box 24 does not meet the emission standards, solenoid valve 27 is opened, and then the gas is pressurized again by piston 19 and transported through connecting pipe 25 to pressurization box 18, and then transported again through connecting pipe 23 to mixing box 24.

[0040] The beneficial effects of the above technical solution are as follows: By setting up a forward and reverse drive motor 36, the forward and reverse rotation of the drive motor 36 facilitates the left and right movement of rack 39, and simultaneously enables the operation of piston 19 and rotating shaft 34; by setting up reset spring 20 and reset spring 42, the piston 19 and slider 40 are reset; by setting up rack 45 and gear 46, the rotating shaft 34 is rotated; by setting up several nozzles 32 and stirring rod 35, the exhaust gas and chemical treatment liquid are fully mixed; by setting up an exhaust gas detector 30, the gas in the mixing chamber 24 is detected, thereby enabling the opening and closing of solenoid valves 27 and 29 according to the exhaust gas treatment; by setting up backflow valve 22, backflow valve 26 and backflow valve 33, the backflow of gas is prevented, making it very convenient and practical.

[0041] Example 4

[0042] Based on Examples 1-3, a waste gas treatment device for a gas turbine power plant, wherein the waste gas burner 15 further includes:

[0043] The first temperature sensor is used to detect the preheating temperature of the fuel gas entering the connecting pipe 17 in the exhaust gas burner 15.

[0044] The second temperature sensor is used to detect the preheating temperature of the fuel gas discharge nozzle 16 in the exhaust gas burner 15.

[0045] The controller and the alarm are electrically connected to the first temperature sensor, the second temperature sensor, and the alarm.

[0046] Optionally, the controller controls the alarm based on the first temperature sensor and the second temperature sensor, including the following steps:

[0047] Step 1: Based on formula (1) and the detection values ​​of the first and second temperature sensors, calculate the actual heat loss Q of the exhaust gas burner 15. The controller compares the actual heat loss Q of the exhaust gas burner 15 with the preset heat loss range. When the actual heat loss exceeds the preset heat loss range, the controller activates the alarm.

[0048]

[0049] Where M is the mass of fuel used in exhaust gas burner 15, C is the specific heat at constant volume of fuel in exhaust gas burner 15, α is the ratio of the cross-sectional area of ​​nozzle 16 to the outlet area of ​​connecting pipe 17, and T y The value detected by the first temperature sensor. For the combustion efficiency of fuel in exhaust gas burner 15, T s The value is the detected value of the second temperature sensor, Re is the Reynolds number, and λ is the friction coefficient of the fuel in the connecting pipe 17 of the exhaust gas burner 15 (the value ranges from 0.26 to 0.76).

[0050] The beneficial effects of the above technical solution are as follows: The controller calculates the actual heat loss of the exhaust gas burner 15 based on the formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor, and comprehensively considers the mass of fuel used in the exhaust gas burner 15, the constant volume specific heat of the fuel in the exhaust gas burner 15, the ratio of the cross-sectional area of ​​the nozzle 16 head to the outlet area of ​​the connecting pipe 17, the combustion efficiency of the fuel in the exhaust gas burner 15, the Reynolds number, and the friction coefficient of the fuel in the connecting pipe 17, thereby making the calculation results more accurate and reliable.

[0051] The controller compares the actual heat loss of the exhaust gas burner 15 with the preset heat loss range. When the actual heat loss is higher than the preset heat loss range, the controller activates the alarm to remind staff to repair or replace the exhaust gas burner 15 in a timely manner, thereby meeting the user's needs for the exhaust gas treatment device of this type of gas turbine power plant.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An exhaust gas treatment device for a combustion engine thermal power plant, characterized in that The utility model relates to a waste gas pre -treatment box (1) one end is connected with thermal power plant waste gas emission end through waste gas receiving pipe (2), and the other end of waste gas pre -treatment box (1) is connected with waste gas purification box (4) through connecting pipe no. The waste gas pre -treatment mechanism includes: liquid input pipe (5), liquid input pipe (5) fixed mounting is at the top of waste gas pre -treatment box (1), and the electromagnetic valve no. The waste gas purification box (4) is internally provided with a waste gas purification mechanism, and the waste gas purification mechanism comprises a pressurizing box (18) fixedly installed on the inner wall of the left end of the waste gas purification box (4), a piston (19) slidably connected in the pressurizing box (18), a plurality of reset springs (20) fixedly installed at the bottom end of the piston (19), the bottom end of the reset spring (20) fixedly installed on the inner wall of the pressurizing box (18), a connecting rope (21) fixedly installed at the bottom end of the piston (19), the other end of the connecting rope (21) penetrating through the pressurizing box (18) and connected with a driving assembly, the left end of the pressurizing box (18) is communicated with the connecting pipe no. ​ The gas-liquid mixing assembly comprises a mixing box (24) fixedly installed on the right end inner wall of the exhaust gas purification box (4), a connecting pipe four (25) one end communicated with the top end of the pressurizing box (18), the other end of the connecting pipe four (25) communicated with the left top end of the mixing box (24), and a reverse flow valve two (26) arranged in the connecting pipe four (25), an electromagnetic valve three (27) fixedly installed on the connecting pipe four (25), an exhaust pipe (28) one end communicated with the top end of the mixing box (24), and the other end of the exhaust pipe (28) penetrates the exhaust gas purification box (4), and an electromagnetic valve four (29) fixedly installed on the exhaust pipe (28), an exhaust gas detector (30) fixedly installed on the top end inner wall of the mixing box (24), a long pipe (31) fixedly installed on the bottom end inner wall of the mixing box (24), and a plurality of nozzles two (32) arranged on the top end of the long pipe (31), the left end of the long pipe (31) connected with the connecting pipe three (23), and a reverse flow valve three (33) fixedly installed in the connecting pipe three (23), a rotating shaft (34) top end rotatably connected with the inner wall of the mixing box (24), and the bottom end of the rotating shaft (34) penetrates the mixing box (24) and is connected with the driving assembly, and a plurality of stirring rods (35) fixedly installed on the rotating shaft (34). The driving assembly comprises a forward and reverse rotation driving motor (36), a fixed end of the forward and reverse rotation driving motor (36) fixedly installed on the supporting rod (37), and a gear one (38) fixedly installed on the output end of the forward and reverse rotation driving motor (36), the gear one (38) meshingly connected with the rack one (39), and the top end of the rack one (39) fixedly connected with the sliding block one (40), and the sliding block one (40) left and right slidingly connected in the L-shaped sliding rail (41), one end of the reset spring two (42) connected with the inner wall of the L-shaped sliding rail (41), the other end of the reset spring two (42) fixedly installed on the sliding block one (40), a pulley (43) fixedly installed on the left end of the L-shaped sliding rail (41), one end of the connecting rope (21) fixedly installed on the sliding block one (40), and the other end of the connecting rope (21) connected with the piston (19) through the pulley (43), the right end of the rack one (39) connected with the rack two (45) through a short rod (44), and the rack two (45) meshingly connected with the gear two (46), and the gear two (46) fixedly installed on the rotating shaft (34) fixedly connected, the top end of the sliding block two (47) fixedly installed on the rack two (45), and the bottom end of the sliding block two (47) slidingly connected on the sliding rail (48), and the sliding rail (48) fixedly installed on the bottom end inner wall of the mixing box (24).

2. A waste gas treatment device for a combined cycle plant according to claim 1, characterized in that The exhaust gas combustion assembly comprises a baffle two (13) fixedly installed on the left end inner wall of the exhaust gas combustion chamber (12), a baffle three (14) fixedly installed on the top end of the baffle two (13) and the right end inner wall of the exhaust gas combustion chamber (12), an exhaust gas burner (15) fixedly installed on the left end outer wall of the exhaust gas pretreatment box (1), and the upper and lower two side output ends of the exhaust gas burner (15) communicated with a plurality of nozzles one (16) through the connecting pipe two (17) arranged in the baffle one (7) and the baffle two (13).

3. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 2, characterized in that, The waste gas burner (15) further comprises: a first temperature sensor for detecting the preheating temperature of the fuel gas when entering the second connecting pipe (17) in the waste gas burner (15); a second temperature sensor for detecting the preheating temperature of the fuel gas when discharging from the first nozzle (16) in the waste gas burner (15); a controller and an alarm, the controller being electrically connected with the first temperature sensor, the second temperature sensor and the alarm.

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