Waste gas treatment device of gas turbine thermal power plant

Abstract

The invention provides a waste gas treatment device of a gas turbine 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 the waste gas discharge end of the thermal power plant through a waste gas receiving pipe, and the other end of the waste gas pretreatment box is connected with a waste gas purification box through a first connecting pipe; a waste gas pretreatment mechanism is arranged in the waste gas pretreatment box. The waste gas pretreatment mechanism is arranged, and meanwhile, the waste gas pretreatment mechanism treats returned waste gas, so that the problems that in the background technology, a traditional waste gas combustion device is prone to insufficient combustion, and consequently the emission standard cannot be met are effectively solved; and heat generated by using a traditional waste gas combustion device is generally not utilized, so that energy waste is caused.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device for a combustion engine thermal power plant. Background Art

[0002] Gas turbine thermal power plants generate a large amount of waste gas during the production process, which mainly comes from fuel combustion, boiler emissions and equipment leakage, etc. The waste gas contains a large amount of harmful gases such as carbon dioxide, sulfur dioxide, nitrogen oxides, as well as pollutants such as particulate matter and incompletely burned hydrocarbons.

[0003] However, when using traditional exhaust gas combustion devices, incomplete combustion is prone to occur, resulting in failure to meet emission standards, and the heat generated by traditional exhaust gas combustion devices is usually not utilized, resulting in energy waste. Therefore, in view of the above situation, it is urgent to develop an exhaust gas treatment device for a gas turbine thermal power plant to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides an exhaust gas treatment device for a gas turbine thermal power plant, which is used to solve the technical problems raised by the above background technology: traditional exhaust gas combustion devices are prone to incomplete combustion, resulting in failure to meet emission standards, and the heat generated by traditional exhaust gas combustion devices is usually not utilized, resulting in energy waste.

[0005] In order to solve the above technical problems, the present invention discloses an exhaust gas treatment device for a gas turbine thermal power plant, comprising: an exhaust gas pretreatment box, one end of the exhaust gas pretreatment box is connected to the exhaust gas discharge end of the thermal power plant through an exhaust gas receiving pipe, and the other end of the exhaust gas pretreatment box is connected to the exhaust gas purification box through a connecting pipe, and an exhaust gas pretreatment mechanism is arranged in the exhaust gas pretreatment box.

[0006] Preferably, the exhaust gas pretreatment mechanism includes: a liquid input pipe, the liquid input pipe is fixedly installed on the top of the exhaust gas pretreatment box, and an electromagnetic valve 1 is fixedly installed on the liquid input pipe, and a partition 1 is fixedly installed on the inner wall of the exhaust gas pretreatment box, the right end of the partition 1 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 with a connecting pipe 1, the upper and lower ends of the partition 1 are respectively a liquid heating chamber and an exhaust gas combustion chamber, a liquid output pipe is fixedly installed on the exhaust gas pretreatment box at the left end of the liquid heating chamber, and an electromagnetic valve 2 is fixedly installed on the liquid output pipe, and an exhaust gas combustion component is arranged in the exhaust gas combustion chamber.

[0007] Preferably, the waste gas combustion assembly includes: partition two, the partition two is fixedly mounted on the inner wall of the left end of the waste gas combustion chamber, partition three is fixedly mounted on the inner wall of the right end of the waste gas combustion chamber at the top of partition two, the waste gas burner is fixedly mounted on the outer wall of the left end of the waste gas pretreatment box, and the upper and lower output ends of the waste gas burner are connected to a plurality of nozzles one through connecting pipe two provided in partition one and partition two.

[0008] Preferably, an exhaust gas purification mechanism is arranged inside the exhaust gas purification box, and the exhaust gas purification mechanism comprises: a pressurizing box, which is fixedly mounted on the inner wall at the left end of the exhaust gas purification box, and a piston is connected in an up and down sliding manner in the pressurizing box, a plurality of return springs, one top end of which is fixedly mounted on the bottom end of the piston, and one bottom end of a return spring is fixedly mounted on the inner wall of the pressurizing box, one end of a connecting rope is fixedly mounted on the bottom end of the piston, and the other end of the connecting rope passes through the pressurizing box and is connected to a driving assembly, and the left end of the pressurizing box is connected to a connecting pipe, and a reverse flow valve is fixedly mounted in the connecting pipe, one end of a connecting pipe is connected to the pressurizing box, and the other end of the connecting pipe is connected to a gas-liquid mixing assembly.

[0009] Preferably, the gas-liquid mixing component includes: a mixing box, the right end of the mixing box is fixedly mounted on the inner wall of the right end of the exhaust gas purification box, one end of a connecting pipe four is connected to the top of the pressurizing box, the other end of the connecting pipe four is connected to the top of the left side of the mixing box, and a reverse flow valve two is arranged in the connecting pipe four, an electromagnetic valve three is fixedly mounted on the connecting pipe four, one end of the exhaust pipe is connected to the top of the mixing box, and the other end of the exhaust pipe passes through the exhaust gas purification box, and an electromagnetic valve four is fixedly mounted on the exhaust pipe, an exhaust gas detector is fixedly mounted on the inner wall of the top of the mixing box, a long tube is fixedly mounted on the inner wall of the bottom end of the mixing box, and a plurality of nozzles two are arranged on the top of the long tube, the left end of the long tube is connected to a connecting pipe three, and a reverse flow valve three is fixedly mounted in the connecting pipe three, the top end of the rotating shaft is rotatably connected to the inner wall of the mixing box, and the bottom end of the rotating shaft passes through the mixing box and is connected to the driving assembly, and a plurality of stirring rods are fixedly mounted on the rotating shaft.

[0010] Preferably, the driving assembly includes: a forward and reverse driving motor, the fixed end of the forward and reverse driving motor is fixedly mounted on the supporting rod, and the output end of the forward and reverse driving motor is fixedly mounted with a gear 1, the gear 1 is meshingly connected with a rack 1, and the top end of the rack 1 is fixedly connected with a slider 1, and the slider 1 is slidably connected left and right in the L-shaped slide rail, one end of a return spring 2 is connected to the inner wall of the L-shaped slide rail, and the other end of the return spring 2 is fixedly mounted on the slider 1, the pulley is fixedly mounted on the left end of the L-shaped slide rail, one end of a connecting rope is fixedly mounted on the slider 1, and the other end of the connecting rope is connected to the piston through the pulley, the right end of the rack 1 is connected to the rack 2 through a short rod, and the rack 2 is meshingly connected with the gear 2, the gear 2 is fixedly mounted on the rotating shaft and fixedly connected, the top end of the slider 2 is fixedly mounted on the rack 2, and the bottom end of the slider 2 is slidably connected to the slide rail, and the slide rail is fixedly mounted on the inner wall of the bottom end of the mixing box.

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

[0012] A first temperature sensor is used to detect the preheating temperature of the fuel gas in the exhaust gas burner when it enters the connecting pipe 2;

[0013] A second temperature sensor is used to detect the preheating temperature of the fuel gas in the exhaust gas burner when it is discharged from the nozzle;

[0014] A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm.

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

[0016] Step 1: According to formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor, the actual heat loss Q of the exhaust gas burner is calculated. The controller compares the actual heat loss Q of the exhaust gas burner with the preset heat loss range. When the actual heat loss is higher than the preset heat loss range, the controller controls the alarm to sound an alarm:

[0017]

[0018] Where M is the mass of the fuel used by the exhaust gas burner, C is the constant volume specific heat of the exhaust gas burner fuel, α is the ratio of the cross-sectional area of ​​the nozzle head to the outlet area of ​​the connecting pipe, T y is the detection value of the first temperature sensor, is the combustion efficiency of the exhaust gas burner fuel, T s is the detection value of the second temperature sensor, Re is the Reynolds number, and λ is the resistance coefficient along the exhaust gas burner fuel in the second connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention;

[0021] Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the exhaust gas purification box.

[0022] Reference numerals:

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

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present invention provides the following embodiments

[0027] Example 1

[0028] The embodiment of the present invention provides an exhaust gas treatment device for a combustion engine thermal power plant, such as Figure 1As shown, a waste gas treatment device of a gas turbine thermal power plant includes: a waste gas pretreatment box 1, one end of the waste gas pretreatment box 1 is connected to the waste gas discharge end of the thermal power plant through a waste gas receiving pipe 2, and the other end of the waste gas pretreatment box 1 is connected to the waste gas purification box 4 through a connecting pipe 3, and a waste gas pretreatment mechanism is arranged in the waste gas pretreatment box 1.

[0029] The beneficial effects of the above technical solution are: the present invention sets up a waste gas pretreatment mechanism, and the waste gas pretreatment mechanism returns the waste gas for treatment, thereby effectively improving the technical problems raised in the background technology: 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.

[0030] Example 2

[0031] On the basis of Example 1, Figure 1 As shown, a waste gas treatment device of a gas turbine thermal power plant, the waste gas pretreatment mechanism includes: a liquid input pipe 5, the liquid input pipe 5 is fixedly installed on the top of the waste gas pretreatment box 1, and a solenoid valve 6 is fixedly installed on the liquid input pipe 5, and a partition 7 is fixedly installed on the inner wall of the waste gas pretreatment box 1, the right end of the partition 7 is fixed to the input end of the gas circulation pipe 8, the output end of the gas circulation pipe 8 passes through the waste gas pretreatment box 1 and is connected with the connecting pipe 3, the upper and lower ends of the partition 7 are respectively a liquid heating chamber 10 and a waste gas combustion chamber 12, a liquid output pipe 9 is fixedly installed on the waste gas pretreatment box 1 at the left end of the liquid heating chamber 10, a solenoid valve 11 is fixedly installed on the liquid output pipe 9, and a waste gas combustion component is arranged in the waste gas combustion chamber 12.

[0032] Optionally, the exhaust gas combustion assembly includes: partition two 13, the partition two 13 is fixedly mounted on the inner wall of the left end of the exhaust gas combustion chamber 12, partition three 14 is fixedly mounted on the inner wall of the right end of the exhaust gas combustion chamber 12 at the top of the partition two 13, and the exhaust gas burner 15 (the working principle is: the exhaust gas is introduced and burned at high temperature, the burner in the combustion chamber will burn the fuel to produce a high-temperature flame, so that the exhaust gas is decomposed at high temperature, thereby effectively destroying harmful substances in the exhaust gas.) is fixedly mounted on the outer wall of the left end of the exhaust gas pretreatment box 1, and the upper and lower output ends of the exhaust gas burner 15 are connected to a plurality of nozzles 16 through partition one 7 and a connecting pipe two 17 provided in the partition two 13.

[0033] The working principle of the above technical solution is: by connecting the exhaust gas receiving pipe 2 with the exhaust gas discharge end of the thermal power plant, and then opening the electromagnetic valve 6, the liquid delivery pipe delivers water from the liquid input pipe 5 to the liquid heating chamber 10, and then close the electromagnetic valve 6, and start the exhaust gas burner 15 at the same time, the exhaust gas burner 15 starts to deliver fuel to the delivery ends of several nozzles 16, and then the exhaust gas is transported between the partitions. At the same time, the combustible gas that is not fully burned in the exhaust gas is fully burned under the action of the exhaust gas burner 15, and 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 electromagnetic valve 11 is opened to output the heated water through the liquid output pipe 9.

[0034] The beneficial effects of the above technical solution are as follows: by arranging the exhaust gas burner 15 and a plurality of nozzles 16, it is beneficial to effectively burn the exhaust gas, and effectively burn the exhaust gas that has not been completely burned in the exhaust gas, thereby preventing the exhaust gas from being directly discharged into the air and polluting the environment; by arranging 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 exhaust gas after combustion; by arranging the liquid input pipe 5 and the liquid output pipe 9, it is beneficial to realize the input and discharge of heated water, which is very convenient and practical.

[0035] Example 3

[0036] On the basis of Example 1-2, a waste gas treatment device of a gas turbine thermal power plant is provided, wherein a waste gas purification mechanism is arranged inside the waste gas purification box 4, and the waste gas purification mechanism comprises: a pressurizing box 18, wherein the pressurizing box 18 is fixedly mounted on the inner wall at the left end of the waste gas purification box 4, and a piston 19 is slidably connected up and down in the pressurizing box 18, a plurality of return springs 20 are fixedly mounted on the top end of the bottom end of the piston 19, and the bottom end of the return spring 20 is fixedly mounted on the inner wall of the pressurizing box 18, one end of a connecting rope 21 is fixedly mounted on the bottom end of the piston 19, and the other end of the connecting rope 21 passes through the pressurizing box 18 and is connected to a driving assembly, and the left end of the pressurizing box 18 is connected to a connecting pipe 3, and a reverse flow valve 22 is fixedly mounted inside the connecting pipe 3, one end of a connecting pipe 23 is connected to the pressurizing 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 component includes: a mixing box 24, the right end of the mixing box 24 is fixedly mounted on the inner wall of the right end of the exhaust gas purification box 4 (the mixing box 24 is provided with a gas chemical treatment liquid), one end of a connecting pipe 25 is connected to the top of the pressurizing box 18, the other end of the connecting pipe 25 is connected to the top of the left side of the mixing box 24, and a reverse flow valve 26 is provided in the connecting pipe 25, and a solenoid valve 3 27 is fixedly mounted on the connecting pipe 25, one end of an exhaust pipe 28 is connected to the top of the mixing box 24, and the other end of the exhaust pipe 28 passes through the exhaust gas purification box 4, A solenoid valve four 29 is fixedly installed on the exhaust pipe 28, an exhaust gas detector 30 is fixedly installed on the inner wall of the top end of the mixing box 24, a long tube 31 is fixedly installed on the inner wall of the bottom end of the mixing box 24, and a plurality of nozzles two 32 are arranged on the top end of the long tube 31, the left end of the long tube 31 is connected to the connecting tube three 23, and a reverse flow valve three 33 is fixedly installed in the connecting tube three 23, the top end 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 driving assembly, and a plurality of stirring rods 35 are fixedly installed on the rotating shaft 34.

[0038] Optionally, the driving assembly includes: a forward and reverse driving motor 36, the fixed end of the forward and reverse driving motor 36 is fixedly mounted on the support rod 37, and the output end of the forward and reverse driving motor 36 is fixedly mounted with a gear 38, the gear 38 is meshed and connected with a rack 39, and the top of the rack 39 is fixedly connected with a slider 40, and the slider 40 is slidably connected to the L-shaped slide rail 41, one end of the 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, and the slide Wheel 43 is fixedly mounted on the left end of the L-shaped slide rail 41, one end of the connecting rope 21 is fixedly mounted on the slider 1 40, and the other end of the connecting rope 21 is connected to the piston 19 through the pulley 43, the right end of the rack 1 39 is connected to the rack 2 45 through the short rod 44, and the rack 2 45 is meshed with the gear 2 46, and the gear 2 46 is fixedly mounted on the rotating shaft 34 and fixedly connected, the top end of the slider 2 47 is fixedly mounted on the rack 2 45, and the bottom end of the slider 2 47 is slidably connected to the slide rail 48, and the slide rail 48 is fixedly mounted on the inner wall of the bottom end of the 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 1 39 meshing therewith to move left and right, the rack 1 39 moves left and right and drives the slider 1 40 fixedly connected therewith to slide left and right on the L-shaped slide rail 41, the slider 1 40 slides left and right and drives the connecting rope 21 fixedly connected therewith to drive the piston 19 to move up and down, and at the same time, the rack 1 39 moves left and right and drives the L-shaped slide rail 41 and the rack 2 45 fixed therewith to move left and right, the rack 2 45 moves left and right and drives the gear 2 46 meshing therewith to rotate, the gear 2 46 rotates and drives the rotating shaft 34 fixedly connected therewith to rotate, the rotating shaft 34 rotates and drives the plurality of stirring rods 35 to rotate forward and reversely, and when the piston 19 moves downward When the exhaust gas is in the mixing box 24, the exhaust gas transported through the connecting pipe 3 is transported to the piston 19. When the piston 19 moves upward, the exhaust gas in the pressurizing box 18 is transported to the mixing box 24 through the connecting pipe 3 23 (the electromagnetic valve 3 27 is in a closed state at this time). The exhaust gas in the connecting pipe 3 23 is sprayed out through the long tube 31 and a plurality of nozzles 2 32. When the exhaust gas detector 30 detects that the exhaust gas in the mixing box 24 meets the emission standards, the electromagnetic valve 4 29 is opened to discharge the exhaust gas through the exhaust pipe 28. When the exhaust gas detector 30 detects that the exhaust gas in the mixing box 24 does not meet the emission standards, the electromagnetic valve 3 27 is opened, and then the exhaust gas is again transported to the pressurizing box 18 through the connecting pipe 4 25 through the pressurization of the piston 19, and then again transported to the mixing box 24 through the connecting pipe 3 23.

[0040] The beneficial effects of the above technical solution are as follows: by setting the forward and reverse drive motor 36, the forward and reverse rotation of the forward and reverse drive motor 36 is conducive to the left and right movement of the rack 1 39, and the operation of the piston 19 and the rotating shaft 34 is realized at the same time; by setting the reset spring 1 20 and the reset spring 2 42, it is conducive to the reset of the piston 19 and the slider 1 40; by setting the rack 2 45 and the gear 2 46, it is conducive to the rotation of the rotating shaft 34; by setting a plurality of nozzles 2 32 and stirring rods 35, it is conducive to the full mixing of the exhaust gas and the chemical treatment liquid; by setting the exhaust gas detector 30, it is conducive to the detection of the gas in the mixing box 24, so as to realize the opening and closing of the electromagnetic valve 3 27 and the electromagnetic valve 4 29 according to the treatment of the exhaust gas; by setting the reverse flow valve 1 22, the reverse flow valve 2 26 and the reverse flow valve 3 33, it is conducive to preventing the backflow of the gas, which is very convenient and practical.

[0041] Example 4

[0042] Based on the embodiments 1-3, an exhaust gas treatment device for a combustion engine thermal power plant, the exhaust gas burner 15 further includes:

[0043] The first temperature sensor is used to detect the preheating temperature of the fuel gas in the exhaust gas burner 15 when it enters the connecting pipe 2 17;

[0044] The second temperature sensor is used to detect the preheating temperature of the fuel gas in the exhaust gas burner 15 when it is discharged from the nozzle 16;

[0045] A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm.

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

[0047] Step 1: According to formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor, the actual heat loss Q of the exhaust gas burner 15 is calculated. 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 is higher than the preset heat loss range, the controller controls the alarm to sound an alarm:

[0048]

[0049] Where M is the mass of the fuel used by the exhaust gas burner 15, C is the constant volume specific heat of the fuel of the exhaust gas burner 15, α is the ratio of the head cross-sectional area of ​​the nozzle 16 to the outlet area of ​​the connecting pipe 2 17, T y is the detection value of the first temperature sensor, is the combustion efficiency of the fuel of the exhaust gas burner 15, T s is the detection value of the second temperature sensor, Re is the Reynolds number, and λ is the resistance coefficient along the exhaust gas burner 15 fuel in the connecting pipe 2 17 (the value range is 0.26-0.76).

[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 the fuel used by the exhaust gas burner 15, the constant volume specific heat of the fuel of the exhaust gas burner 15, the ratio of the head cross-sectional area of ​​the nozzle 16 to the outlet area of ​​the connecting pipe 2 17, the combustion efficiency of the fuel of the exhaust gas burner 15, the Reynolds number, and the drag coefficient along the exhaust gas burner 15 fuel in the connecting pipe 2 17, so that the calculation result is 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 controls the alarm to sound an alarm, thereby reminding the staff to inspect or replace the exhaust gas burner 15 in time, thereby meeting the user's demand for the exhaust gas treatment device of this type of gas turbine thermal power plant.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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 gas turbine thermal power plant, characterized in that: include: A waste gas pretreatment box (1), one end of the waste gas pretreatment box (1) is connected to the waste gas discharge end of a thermal power plant via a waste gas receiving pipe (2), and the other end of the waste gas pretreatment box (1) is connected to a waste gas purification box (4) via a connecting pipe (3), and a waste gas pretreatment mechanism is arranged in the waste gas pretreatment box (1).

2. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 1, characterized in that The exhaust gas pretreatment mechanism comprises: a liquid input pipe (5), the liquid input pipe (5) is fixedly mounted on the top of the exhaust gas pretreatment box (1), and an electromagnetic valve (6) is fixedly mounted on the liquid input pipe (5), and a partition (7) is fixedly mounted 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 the 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 the connecting pipe (3), the upper and lower ends of the partition (7) are respectively a liquid heating chamber (10) and an exhaust gas combustion chamber (12), a liquid output pipe (9) is fixedly mounted on the exhaust gas pretreatment box (1) at the left end of the liquid heating chamber (10), and an electromagnetic valve (11) is fixedly mounted on the liquid output pipe (9), and an exhaust gas combustion component is arranged in the exhaust gas combustion chamber (12).

3. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 2 is characterized in that The waste gas combustion assembly comprises: a partition plate 2 (13), the partition plate 2 (13) is fixedly mounted on the inner wall of the left end of the waste gas combustion chamber (12), a partition plate 3 (14) is fixedly mounted on the inner wall of the right end of the waste gas combustion chamber (12) at the top of the partition plate 2 (13), a waste gas burner (15) is fixedly mounted on the outer wall of the left end of the waste gas pretreatment box (1), and the upper and lower output ends of the waste gas burner (15) are connected to a plurality of nozzles 1 (16) through a connecting pipe 2 (17) provided in the partition plate 1 (7) and the partition plate 2 (13).

4. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 1, characterized in that: An exhaust gas purification mechanism is arranged inside the exhaust gas purification box (4), and the exhaust gas purification mechanism comprises: a pressurizing box (18), the pressurizing box (18) is fixedly mounted on the inner wall of the left end of the exhaust gas purification box (4), and a piston (19) is slidably connected to the pressurizing box (18) in an up-and-down manner, a plurality of return springs (20) are fixedly mounted on the bottom end of the piston (19), and the bottom end of the return spring (20) is fixedly mounted on the inner wall of the pressurizing box (18), one end of a connecting rope (21) is fixedly mounted on the bottom end of the piston (19), and the other end of the connecting rope (21) passes through the pressurizing box (18) and is connected to the driving component, and the left end of the pressurizing box (18) is connected to the connecting pipe (3), and a reverse flow valve (22) is fixedly mounted inside the connecting pipe (3), one end of a connecting pipe (23) is connected to the pressurizing box (18), and the other end of the connecting pipe (23) is connected to the gas-liquid mixing component.

5. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 4, characterized in that: The gas-liquid mixing assembly comprises: a mixing box (24), the right end of the mixing box (24) is fixedly mounted on the inner wall of the right end of the exhaust gas purification box (4), one end of a connecting pipe (25) is connected to the top of the pressurizing box (18), the other end of the connecting pipe (25) is connected to the top of the left side of the mixing box (24), and a reverse flow valve (26) is arranged in the connecting pipe (25), and a solenoid valve (27) is fixedly mounted on the connecting pipe (25), one end of an exhaust pipe (28) is connected to the top of the mixing box (24), and the other end of the exhaust pipe (28) passes through the exhaust gas purification box (4), and a solenoid valve (27) is fixedly mounted on the exhaust pipe (28). The electromagnetic valve (29) and the exhaust gas detector (30) are fixedly mounted on the inner wall of the top end of the mixing box (24). The long tube (31) is fixedly mounted on the inner wall of the bottom end of the mixing box (24), and a plurality of nozzles (32) are arranged on the top end of the long tube (31). The left end of the long tube (31) is connected to the connecting tube (23), and a reverse flow valve (33) is fixedly mounted in the connecting tube (23). The top end 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 driving component. A plurality of stirring rods (35) are fixedly mounted on the rotating shaft (34).

6. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 4, characterized in that: The driving assembly comprises: a forward and reverse driving motor (36), a fixed end of the forward and reverse driving motor (36) is fixedly mounted on a support rod (37), and a gear 1 (38) is fixedly mounted on an output end of the forward and reverse driving motor (36), the gear 1 (38) is meshedly connected with a rack 1 (39), and the top end of the rack 1 (39) is fixedly connected with a slider 1 (40), and the slider 1 (40) is slidably connected to the L-shaped slide rail (41) left and right, one end of a return spring 2 (42) is connected to the inner wall of the L-shaped slide rail (41), and the other end of the return spring 2 (42) is fixedly mounted on the slider 1 (40), and a pulley (43) is fixedly mounted on the slider 1 (40). The invention is installed at the left end of the L-shaped slide rail (41), one end of the connecting rope (21) is fixedly installed on the slider (40), and the other end of the connecting rope (21) is connected to the piston (19) through a pulley (43), the right end of the rack (39) is connected to the rack (45) through a short rod (44), and the rack (45) is meshed with the gear (46), and the gear (46) is fixedly installed on the rotating shaft (34) and fixedly connected, the top end of the slider (47) is fixedly installed on the rack (45), and the bottom end of the slider (47) is slidably connected to the slide rail (48), and the slide rail (48) is fixedly installed on the inner wall of the bottom end of the mixing box (24).

7. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 1, characterized in that: The exhaust gas burner (15) further comprises: A first temperature sensor, used to detect the preheating temperature of the fuel gas in the exhaust gas burner (15) when it enters the second connecting pipe (17); a second temperature sensor for detecting a preheating temperature of the fuel gas in the exhaust gas burner (15) when the fuel gas is discharged from the nozzle one (16); A controller and an alarm, wherein the controller is electrically connected to the first temperature sensor, the second temperature sensor and the alarm.

8. The exhaust gas treatment device of a combustion engine thermal power plant according to claim 7, characterized in that: The controller controls the alarm to work based on the first temperature sensor and the second temperature sensor, including the following steps: Step 1: According to formula (1) and the detection values ​​of the first temperature sensor and the second temperature sensor, the actual heat loss Q of the exhaust gas burner (15) is calculated, and the controller compares the actual heat loss Q of the exhaust gas burner (15) with a preset heat loss range. When the actual heat loss is higher than the preset heat loss range, the controller controls the alarm to sound an alarm: Where M is the mass of the fuel used by the exhaust gas burner (15), C is the constant volume specific heat of the fuel of the exhaust gas burner (15), α is the ratio of the head cross-sectional area of ​​the nozzle 1 (16) to the outlet area of ​​the connecting pipe 2 (17), T y is the detection value of the first temperature sensor, is the combustion efficiency of the fuel in the exhaust gas burner (15), T s is the detection value of the second temperature sensor, Re is the Reynolds number, and λ is the resistance coefficient along the exhaust gas burner (15) fuel in the second connecting pipe (17).

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