Shock wave soot blowing system

Abstract

The application discloses a kind of shock wave soot blowing systems, the shock wave soot blowing system includes mixing pipe, multiple turbulence spring, ignition assembly, shock wave generating tank and spray pipe, mixing pipe has mixing chamber, mixing chamber is suitable for mixing compressed air and acetylene, multiple turbulence spring is sequentially arranged along the radial direction of mixing pipe and is set in mixing pipe, so that turbulence spring makes compressed air and acetylene fully mixed, ignition assembly is communicated with mixing pipe, so that the gas after mixing of mixing pipe is ignited by ignition assembly, shock wave generating tank is communicated with ignition assembly, so that the gas after ignition flows into shock wave generating tank to generate shock wave energy, spray pipe is suitable for being arranged in hearth and being communicated with shock wave generating tank, so that the shock wave energy generated by shock wave generating tank is sprayed into hearth by spray pipe.The shock wave soot blowing system of the embodiment of the application has the advantages of simple structure, good blowing effect and the like.

Description

Technical Field

[0001] This invention relates to the field of furnace soot blowing equipment technology, specifically to a shock wave soot blowing system. Background Technology

[0002] Gas-fired shockwave soot blowers are essential auxiliary equipment for various pulverized coal industrial furnaces, waste heat furnaces, and power plant furnaces. They can effectively remove ash accumulation on various heating surfaces of the furnace, thereby maintaining high heat exchange efficiency and improving furnace output.

[0003] Among related technologies, gas-fired shockwave soot blowing systems have poor soot blowing capabilities and high operating costs. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0005] In related technologies, the gas shock wave soot blowing system still has the following problems:

[0006] (1) In related technologies, the gas mixing effect of compressed air and acetylene gas is affected by the pressure of the acetylene cylinder, which affects the injection effect.

[0007] (2) In related technologies, the mixing of compressed air and acetylene is incomplete or insufficient, which leads to carbon buildup or insufficient injection energy.

[0008] (3) In related technologies, the acetylene compressed air is roughly distributed according to the pressure ratio, which is not accurate and affects the injection effect.

[0009] (4) In related technologies, gas shock wave soot blowing systems involve a lot of cable laying. (The cable refers to the solenoid valve or electric valve that controls each branch. In the original system, each electric valve was located 20-100 meters away from the control cabinet near the shock tank, resulting in a long cable between the control cabinet and the electric valve.)

[0010] (5) In related technologies, when the temperature of the furnace is higher than 600 degrees or higher than 600-800 degrees, there will be sparks in the flue gas. This causes the acetylene and compressed air mixture in the shock tank to be ignited prematurely by the sparks in the flue gas before the gas is charged into the gas shock wave soot blowing system. This is called reverse ignition. Reverse ignition will greatly weaken the shock wave soot blowing effect and may even cause the shock wave effect to fail.

[0011] (6) In related technologies, the number of injection points in the gas shock wave blowing system is relatively small. A single shock tank generally corresponds to one nozzle, and the effective blowing area of ​​the heated surface that can be covered by the injection is limited.

[0012] The present invention aims to at least partially solve one of the technical problems in the related art.

[0013] Therefore, embodiments of the present invention propose a shock wave soot blowing system that has good blowing effect, simple structure, and uniform mixing of acetylene and compressed air.

[0014] According to an embodiment of the present invention, a shock wave soot blowing system includes: a mixing tube having a mixing chamber adapted to mix compressed air and acetylene; a plurality of turbulence springs arranged radially and sleeved within the mixing tube to ensure thorough mixing of the compressed air and acetylene; an ignition assembly communicating with the mixing tube to ignite the mixed gas; a shock wave generating tank communicating with the ignition assembly to allow the ignited gas to flow into the shock wave generating tank to generate shock wave energy; a jet pipe adapted to be disposed within a furnace and communicating with the shock wave generating tank to allow the shock wave energy generated by the shock wave generating tank to be injected into the furnace through the jet pipe; and a shielding tube, at least a portion of which is disposed within the jet pipe, and the shielding tube is adapted to allow compressed air to flow through it to isolate the shock wave generating tank from the furnace.

[0015] The shockwave soot blowing system of this invention is equipped with multiple turbulent springs and shielding tubes, which enable the turbulent springs to form a turbulent mixing zone in the mixing tube, allowing compressed air and acetylene to mix more thoroughly, improving the efficiency of acetylene use, reducing the formation of carbon deposits, and the shielding tubes can prevent the mixed gas from contacting the high-temperature flue gas in the furnace, thereby preventing backfire and improving the soot blowing effect of the shockwave soot blowing system.

[0016] In some embodiments, the shockwave soot blowing system further includes an air inlet duct, which includes a first sub-duct, a second sub-duct, a third sub-duct, and a fourth sub-duct that are interconnected with each other. The first sub-duct and the third sub-duct are respectively connected to both ends of the second sub-duct. The cross-sectional areas of the first sub-duct and the third sub-duct gradually decrease along the direction adjacent to the second sub-duct. The third sub-duct is connected to the mixing duct. One end of the fourth sub-duct is connected to the second sub-duct and is located between the first sub-duct and the third sub-duct. The first sub-duct is adapted to introduce compressed air, and the second sub-duct is adapted to introduce acetylene, so that the compressed air generates a negative pressure in the second sub-duct to draw the acetylene in the fourth sub-duct into the second sub-duct.

[0017] In some embodiments, there are multiple shock wave generating canisters, and each of the multiple shock wave generating canisters is connected to the ignition assembly so that the mixed gas ignited by the ignition assembly flows into the multiple shock wave generating canisters respectively.

[0018] In some embodiments, the system further includes an electrical control cabinet. The ignition assembly includes a housing, multiple control valves, and an ignition unit. The housing is disposed adjacent to the electrical control cabinet. The multiple control valves are all disposed within the housing and electrically connected to the electrical control cabinet, so that the electrical control cabinet controls the opening and closing of the control valves. The multiple control valves are connected to multiple shock wave generating tanks in a one-to-one correspondence. The ignition unit is disposed within the housing and is connected to the mixing pipe, so that the mixed gas in the mixing pipe is ignited by the ignition unit. The ignition unit is connected to the multiple control valves, so that the gas is ignited by the ignition unit and flows into the multiple control valves respectively.

[0019] In some embodiments, there are multiple ignition units, each of which is connected to the mixing tube so that the mixed gas in the mixing tube is ignited by the multiple ignition units. The multiple ignition units are connected to the multiple control valves in a one-to-one correspondence so that the mixed gas ignited by the ignition units flows into the corresponding control valves.

[0020] In some embodiments, the shockwave soot blowing system further includes a first detection component disposed within the first sub-tube, for detecting the mass flow rate of compressed air flowing through the first sub-tube; and a second detection component disposed within the fourth sub-tube, for detecting the mass flow rate of acetylene flowing through the fourth sub-tube.

[0021] In some embodiments, the shielding tube includes a plurality of first shielding tubes, which are circumferentially spaced on the outer circumferential surface of the jet pipe and communicate with the jet pipe. The first shielding tubes are adapted to allow shielding air to flow in, so as to prevent the high-temperature flue gas in the furnace from flowing into the shock wave generating tank.

[0022] In some embodiments, the shielding tube includes a second shielding tube disposed inside the jet pipe and extending axially along the jet pipe. The end of the second shielding tube adjacent to the shock wave generating tank is an air inlet end adapted to allow shielding air to enter, and the end of the second shielding tube away from the shock wave generating tank is an air outlet end, so as to prevent high-temperature flue gas in the furnace from flowing into the shock wave generating tank. The cross-sectional area of ​​the air outlet end gradually decreases in the direction away from the shock wave generating tank.

[0023] In some embodiments, there are multiple jet pipes, one end of each jet pipe is connected to the shock wave generating tank, and the other end of each jet pipe is adapted to be located inside the furnace so that the shock wave generated by the shock wave generating tank can be injected into the furnace through the jet pipes.

[0024] In some embodiments, the injection pipe is adapted to be disposed within the furnace and extend circumferentially along the furnace, and the injection pipe is provided with a plurality of injection ports arranged sequentially along the extension direction of the injection pipe, the plurality of injection ports being disposed on the side of the injection pipe opposite to the furnace. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the shock wave soot blowing system according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 A magnified view of part A in the image.

[0027] Figure 3 This is a schematic diagram of the air inlet pipe of the shock wave soot blowing system according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the turbulence spring in the shock wave soot blowing system according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of the first ignition component of the shock wave soot blowing system according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the second ignition component of the shock wave soot blowing system according to an embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the installation of the first shielding tube of the shock wave soot blowing system according to an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the first shielding tube of the shock wave soot blowing system according to an embodiment of the present invention.

[0033] Figure 9 This is a cross-sectional view of the first shielding tube of the shock wave soot blowing system according to an embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of the structure of the second shielding tube of the shock wave soot blowing system according to an embodiment of the present invention.

[0035] Figure 11 This is a schematic diagram of the first installation of the blowpipe of the shock wave soot blowing system according to an embodiment of the present invention.

[0036] Figure 12 This is a second installation diagram of the blowpipe of the shock wave soot blowing system according to an embodiment of the present invention.

[0037] Figure label:

[0038] Shockwave soot blowing system 100; mixing pipe 1; turbulence spring 2; first turbulence spring 21; second turbulence spring 22; third turbulence spring 23; ignition assembly 3; housing 31; control valve 32; ignition unit 33; shockwave generating tank 4; jet pipe 5; jet nozzle 51; shielding pipe 6; first shielding pipe 61; second shielding pipe 62; air outlet 621; air inlet pipe 7; first sub-pipe 71; second sub-pipe 72; third sub-pipe 73; fourth sub-pipe 74; first detection assembly 8; second detection assembly 9; furnace 10; first valve 101; second valve 102. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] The shock wave soot blowing system according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0041] like Figure 1-12 As shown, the shock wave blowing system according to an embodiment of the present invention includes a mixing pipe 1, multiple turbulence springs 2, an ignition assembly 3, a shock wave generating tank 4, a jet pipe 5, and a shielding pipe 6.

[0042] Mixing tube 1 has a mixing chamber suitable for mixing compressed air and acetylene. Specifically, as shown... Figure 1 As shown, compressed air and acetylene can be introduced into the mixing pipe 1, so that the acetylene and compressed air are mixed in the mixing pipe 1 and flow out through the outlet of the mixing pipe 1.

[0043] Multiple turbulence springs 2 are sequentially arranged and sleeved along the radial direction of the mixing pipe 1 and are located inside the mixing pipe 1, so that the turbulence springs 2 can fully mix the compressed air and acetylene. Specifically, as shown in... Figure 4 As shown, the turbulence spring 2 is sequentially sleeved along the inner and outer directions and installed inside the mixing tube 1. The turbulence spring 2 can form a turbulent mixing zone inside the mixing tube 1, so that the compressed air and acetylene are mixed more fully, improving the efficiency of acetylene use and reducing the formation of carbon deposits.

[0044] Ignition assembly 3 is connected to mixing tube 1 so that the gas mixed in mixing tube 1 can be ignited by ignition assembly 3. Specifically, as shown... Figure 1-2 As shown, the inlet of the ignition assembly 3 is connected to the outlet of the mixing tube 1, so that the ignition assembly 3 ignites the gas flowing out after mixing in the mixing tube 1.

[0045] Shock wave generating container 4 is connected to ignition assembly 3 so that the ignited gas flows into shock wave generating container 4 to generate shock wave energy. Specifically, as shown in the figure... Figure 1-2As shown, the inlet of the shock wave generator 4 is connected to the outlet of the ignition assembly 3, so that the mixed gas after being ignited by the ignition assembly 3 flows into the shock wave generator 4 and generates shock wave energy through the shock wave generator 4.

[0046] The injection pipe 5 is adapted to be installed inside the furnace 10 and connected to the shock wave generating tank 4, so that the shock wave generated by the shock wave generating tank 4 can be injected into the furnace 10 through the injection pipe 5. Specifically, as shown in the figure... Figure 1 As shown, the blow pipe 5 is located at the outlet of the shock wave generating tank 4 and inside the furnace 10. The outlet of the blow pipe 5 is opposite to the heating surface of the furnace 10, so that the shock wave generated by the shock wave generating tank 4 can be sprayed into the furnace 10 through the blow pipe 5 to blow the furnace 10, thereby cleaning the inner circumferential surface of the furnace 10.

[0047] At least a portion of the shielding pipe 6 is disposed within and connected to the jet pipe 5. Compressed air is introduced into the shielding pipe 6 to isolate the shock wave generating tank 4 from the furnace 10. Thus, compressed air can be delivered as shielding air to the shielding pipe 6, and then to the jet pipe 5. This allows compressed air to be introduced into the jet pipe 5, preventing high-temperature flue gas in the furnace 10 from flowing into the shock wave generating tank 4 through the shielding pipe 6, thereby preventing backfire in the shock wave generating tank 4 and ensuring the jetting efficiency of the shock wave soot blowing system 100.

[0048] The shockwave soot blowing system 100 of this invention is equipped with multiple turbulent springs 2, which form a turbulent mixing zone in the mixing tube 1, allowing compressed air and acetylene to mix more thoroughly, improving acetylene utilization efficiency and reducing carbon buildup. In addition, the shielding tube 6 is provided to prevent the mixed gas from contacting the high-temperature flue gas in the furnace, thereby preventing backfire. This effectively solves the problem of backfire that often occurs on the high-temperature ash-collecting heated surface due to excessively high temperature at the nozzle (above 800 degrees Celsius) in related technologies, and improves the soot blowing effect of the shockwave soot blowing system 100.

[0049] In some embodiments, the shock wave soot blowing system 100 further includes an air inlet pipe 7, which includes a first sub-pipe 71, a second sub-pipe 72, a third sub-pipe 73, and a fourth sub-pipe 74 that are connected to each other. The first sub-pipe 71 and the third sub-pipe 73 are respectively connected to both ends of the second sub-pipe 72. The cross-sectional area of ​​the first sub-pipe 71 and the cross-sectional area of ​​the third sub-pipe 73 gradually decrease along the direction adjacent to the second sub-pipe 72. The third sub-pipe 73 is connected to the mixing pipe 1. One end of the fourth sub-pipe 74 is connected to the second sub-pipe 72 and one end of the fourth sub-pipe 74 is located between the first sub-pipe 71 and the third sub-pipe 73. The first sub-pipe 71 is adapted to introduce compressed air, and the second sub-pipe 72 is adapted to introduce acetylene, so that the compressed air generates a negative pressure in the second sub-pipe 72 so that the acetylene in the fourth sub-pipe 74 is drawn into the second sub-pipe 72.

[0050] Specifically, such as Figure 3 As shown, the first sub-tube 71 extends in the left-right direction and its cross-sectional area gradually decreases from left to right; the second sub-tube 72 extends in the left-right direction and its cross-sectional area remains constant in the left-right direction; the third sub-tube 73 extends in the left-right direction and its cross-sectional area gradually increases from left to right; the right end of the first sub-tube 71 is connected to the left end of the second sub-tube 72; the left end of the third sub-tube 73 is connected to the right end of the second sub-tube 72; and the fourth sub-tube 74 extends in the up-down direction and is connected to the middle of the second sub-tube 72. The first sub-tube 71 is connected to the second sub-tube 72. Compressed gas can be introduced into the left end of the first sub-tube 71. The fourth sub-tube 74 can be connected to the acetylene cylinder so that the acetylene in the acetylene cylinder can be introduced into the fourth sub-tube 74. The compressed gas creates a Venturi effect in the second sub-tube 72, which can draw the acetylene in the acetylene cylinder into the second sub-tube 72 through the fourth sub-tube 74. This reduces the acetylene inlet pressure in the fourth sub-tube 74, reduces the impact of the acetylene cylinder outlet pressure on the mixing of compressed air and acetylene each time, improves the mixing efficiency of compressed air and acetylene, and facilitates precise control of the acetylene dosage.

[0051] In some embodiments, the pitches of any two adjacent turbulence springs 2 are different, and / or the lengths of any two adjacent turbulence springs 2 are the same. Thus, by arranging the pitches of the multiple turbulence springs 2 to be unequal, the irregularity of the turbulence springs 2 is increased, thereby improving the turbulence effect of the turbulence springs 2. Furthermore, arranging the length of the turbulence springs 2 to be equal to the length of the mixing tube 1 allows the turbulence springs 2 to fill the entire mixing tube 1, improving the turbulence efficiency of the turbulence springs 2 and resulting in a more thorough mixing of compressed air and acetylene.

[0052] In some embodiments, the turbulence spring 2 includes a first turbulence spring 21, a second turbulence spring 22, and a third turbulence spring 23 sequentially sleeved together. The lengths of the first turbulence spring 21, the second turbulence spring 22, and the third turbulence spring 23 are equal, and their ends are fixed together by welding. The pitches of the first turbulence spring 21, the second turbulence spring 22, and the third turbulence spring 23 gradually increase, or the pitches of the first turbulence spring 21, the second turbulence spring 22, and the third turbulence spring 23 gradually decrease. This improves the irregularity of the turbulence spring 2 and enhances its turbulence effect, resulting in a more thorough and complete mixing of compressed air and acetylene, thus solving the problems of carbon buildup in the mixing pipe 1 or insufficient spray energy in the shock wave generator 4.

[0053] In some embodiments, there are multiple shock wave generating canisters 4 and multiple jet pipes 5. One end of each shock wave generating canister 4 is connected to the ignition assembly 3, and the other end of each shock wave generating canister 4 is connected to a corresponding jet pipe 5. Specifically, as shown in the figure... Figure 1As shown, there are multiple shock wave generating tanks 4 and multiple blowing pipes 5, and the inlets of the multiple shock wave generating tanks 4 are all connected to the outlet of the ignition component 3. The outlet of each shock wave generating tank 4 is connected to a blowing pipe 5. One end of the multiple blowing pipes 5 extends into the furnace 10 and is arranged sequentially in the vertical direction. Thus, the furnace 10 can be blown with soot through multiple second pipes, which improves the cleaning efficiency of the shock wave soot blowing system 100.

[0054] In some embodiments, the shock wave soot blowing system 100 includes an electrical control cabinet (not shown in the figure), and the ignition assembly 3 includes a housing 31, a plurality of control valves 32 and an ignition unit 33.

[0055] The enclosure 31 is located adjacent to the electrical control cabinet. Multiple control valves 32 are housed within the enclosure 31 and electrically connected to the control cabinet, allowing the control cabinet to control the opening and closing of the control valves 32. Each control valve 32 is connected to one of the multiple shock wave generating tanks 4. Specifically, as shown... Figure 1 and Figure 5 As shown, the control valve 32 is a solenoid valve. The control valve 32 can be installed inside the housing 31 and electrically connected to the electrical control cabinet via a cable. Thus, the valve opening of multiple solenoid valves can be controlled by the electrical control cabinet. Each control valve 32 is connected to a corresponding shock wave generating tank 4, so the opening of the corresponding shock wave generating tank 4 can be controlled by one control valve 32. In addition, by integrating multiple control valves 32 inside the housing 31 and placing the housing 31 adjacent to the electrical control cabinet (the distance between the housing 31 and the electrical control cabinet is within 5 meters), the distance between the control valves 32 and the electrical control cabinet is reduced compared to related technologies, thereby reducing the cable laying and lowering the processing and manufacturing cost of the shock wave soot blowing system 100.

[0056] Ignition unit 33 is located inside housing 31 and is connected to mixing pipe 1 so that the mixed gas in mixing pipe 1 can be ignited by ignition unit 33. Ignition unit 33 is also connected to multiple control valves 32 so that the gas ignited by ignition unit 33 flows into the multiple control valves 32 respectively. Specifically, as shown... Figure 5 As shown, the ignition unit 33 can be an ignition gun. The ignition unit 33 is located inside the housing 31, and its inlet is connected to the outlet of the mixing pipe 1. This allows the ignition unit 33 to ignite the mixed gas flowing out of the mixing pipe 1. The outlet of the ignition unit 33 is connected to the inlets of multiple control valves 32, allowing the ignited mixed gas to flow into the control valves 32 respectively, and then ignite the gas in the shock wave generating tank 4 through the control valves 32. Therefore, multiple shock wave generating tanks 4 can share a single ignition unit 33, reducing the manufacturing cost of the shock wave soot blowing system 100.

[0057] In some embodiments, there are multiple ignition units 33, each connected to a mixing tube 1, so that the mixed gas in the mixing tube 1 is ignited by the multiple ignition units 33. Each of the multiple ignition units 33 is connected to a corresponding control valve 32, so that the mixed gas ignited by the ignition unit 33 flows into the corresponding control valve 32. Specifically, as shown... Figure 6 As shown, multiple ignition units 33 are housed within the housing 31. The inlets of each ignition unit 33 can be connected to the outlet of the mixing pipe 1, and the outlets of each ignition unit 33 are connected to the inlets of multiple control valves 32. This ensures that each control valve 32 has an ignition unit 33 to ignite the mixed gas. Alternatively, the inlets of multiple control valves 32 can be connected to the outlet of the mixing pipe 1, allowing the mixed gas in the mixing pipe 1 to flow into the control valves 32. The outlet of each control valve 32 is connected to the inlet of an ignition unit 33, and the inlet of each shock wave generator 4 is connected to the outlet of an ignition unit 33. Thus, the ignition unit 33 ignites the mixed gas flowing out of the control valve 32 and directs it into the corresponding shock wave generator 4. This ensures that each shock wave generator 4 is controlled by a corresponding ignition unit 33, improving the stability of the shock wave soot blowing system 100 and allowing the appropriate shock wave generator 4 to be activated as needed.

[0058] In some embodiments, the shock wave blowing system 100 further includes a first detection component 8 and a second detection component 9.

[0059] The first detection component 8 is disposed within the first sub-pipe 71 to detect the mass flow rate of compressed air flowing through the first sub-pipe 71. The second detection component 9 is disposed within the fourth sub-pipe 74 to detect the mass flow rate of acetylene flowing through the fourth sub-pipe 74. Specifically, as... Figure 1 As shown, both the first detection component 8 and the second detection component 9 are mass flow meters. They calculate the reaction molar ratio of compressed air to acetylene based on the molar ratio of acetylene and oxygen and the oxygen content ratio in compressed air. Compressed air and acetylene are then quantitatively configured according to this molar ratio to ensure complete combustion of acetylene. This avoids carbon buildup caused by excessive acetylene gas supply or insufficient shock wave energy caused by insufficient acetylene gas supply. Thus, by precisely controlling the amount of compressed air and acetylene used by the first detection component 8 and the second detection component 9 respectively, the soot blowing capacity and efficiency of the shock wave soot blowing system 100 are improved.

[0060] In some embodiments, such as Figure 1-2 As shown, the shock wave soot blowing system 100 also includes a first valve 101 and a second valve 102.

[0061] The first valve 101 is located in the first sub-pipe 71 to control the flow rate of compressed air into the first sub-pipe 71. The second valve 102 is located in the fourth sub-pipe 74 to control the flow rate of acetylene into the fourth sub-pipe 74. Specifically, both the first valve 101 and the second valve 102 are solenoid valves. The first valve 101 is located at the inlet of the first sub-pipe 71, and the second valve 102 is located at the inlet of the fourth sub-pipe 74. When the first detection component 8 detects that the flow rate of compressed air exceeds a preset value, it can reduce the valve opening of the first valve 101, thereby reducing the flow rate of compressed air in the first sub-pipe 71. When the first detection component 8 detects that the flow rate of compressed air is less than the preset value, it can increase the valve opening of the first valve 101, thereby increasing the flow rate of compressed air in the first sub-pipe 71. Similarly, when the second detection component 9 detects that the flow rate of acetylene exceeds a preset value, it can reduce the valve opening of the second valve 102, thereby reducing the flow rate of acetylene in the fourth sub-pipe 74. When the second detection component 9 detects that the flow rate of acetylene is less than the preset value, it can increase the valve opening of the second valve 102, thereby increasing the flow rate of acetylene in the fourth sub-pipe 74. Thus, by setting the first valve 101 and the second valve 102, the amount of compressed air and acetylene used can be precisely controlled.

[0062] In some embodiments, the shielding pipe 6 further includes a plurality of first shielding pipes 61, which are spaced apart circumferentially on the outer circumferential surface of the jet pipe 5 and communicate with the jet pipe 5. The first shielding pipes 61 are adapted to introduce shielding air to prevent high-temperature flue gas in the furnace 10 from flowing into the shock wave generating tank 4. Specifically, as Figure 7-9 As shown, there are four first shielding tubes 61 (as shown in the figure). The four first shielding tubes 61 are equally spaced along the outer circumference of the jet pipe 5. One end of each first shielding tube 61 is connected to the jet pipe 5. Compressed air can be blown into the jet pipe 5 through the first shielding tubes 61 as shielding air, thereby isolating the flue gas in the furnace 10 from the mixed gas in the shock wave generating tank 4, so as to prevent the mixed gas from being prematurely ignited by the high temperature flue gas.

[0063] In some embodiments, a plurality of first shielding tubes 61 are arranged at equal intervals along the circumference of the blowpipe 5. Thus, the shielding air is evenly blown into the blowpipe 5 through the plurality of first shielding tubes 61, thereby preventing the mixed gas from contacting the high-temperature flue gas inside the furnace and thus preventing backfire.

[0064] In some embodiments, the number of the plurality of first shielding tubes 61 is 3-5. Specifically, the number of first shielding tubes 61 can be any one of 3, 4, and 5. When the number of first shielding tubes 61 is less than 3, the number of first shielding tubes 61 will be small, resulting in poor shielding effect. When the number of first shielding tubes 61 is greater than 5, the number of first shielding tubes 61 on the blowpipe 5 will be large, resulting in excessive shielding air being sprayed into the blowpipe 5, which leads to waste of shielding air and increases the processing and manufacturing cost of the shock wave soot blowing system 100. Therefore, having a plurality of first shielding tubes 61 of 3-5 can reduce the processing and manufacturing cost of the shock wave soot blowing system 100 while ensuring that the first shielding tubes 61 play a shielding role.

[0065] In some embodiments, the shielding tube 6 includes a second shielding tube 62, which is disposed inside the jet pipe 5 and extends axially along the jet pipe 5. One end of the second shielding tube 62 adjacent to the shock wave generating tank 4 is an air inlet adapted to allow shielding air to enter, and the other end of the second shielding tube 62 away from the shock wave generating tank 4 is an air outlet to prevent high-temperature flue gas in the furnace 10 from flowing into the shock wave generating tank 4. The cross-sectional area of ​​the air outlet gradually decreases in the direction away from the shock wave generating tank 4. Specifically, as shown... Figure 10 As shown, the second shielding tube 62 extends in the left-right direction and is disposed inside the blowpipe 5. The left end of the second shielding tube 62 is the inlet of the second shielding tube 62, and the right end of the second shielding tube 62 is the outlet of the second shielding tube 62. The cross-sectional area of ​​the inner circumferential surface of the right end of the second shielding tube 62 gradually decreases from right to left. In other words, the outlet of the second shielding tube 62 gradually increases on the side facing the furnace 10. As a result, compressed air can be introduced into the second shielding tube 62 to blow the flue gas in the second shielding tube 62 into the furnace 10, so as to prevent the mixed gas from being prematurely ignited by the high-temperature flue gas.

[0066] In some embodiments, the second shielding tube 62 includes a first section and a second section that are connected. The first section is disposed inside the blowpipe 5 and extends axially along the blowpipe 5, with an air outlet formed at the free end of the first section. The second section extends radially along the blowpipe 5 and has an air inlet formed at the free end of the first section, with the air inlet located outside the blowpipe 5. Specifically, the first section extends in the left-right direction, the second section extends in the up-down direction, and the lower end of the second section is connected to the left end of the first section. The upper end of the second section extends outside the blowpipe 5 and serves as the air inlet of the third tube. The right end of the first section is the air outlet, thereby blowing shielding air into the first section through the second section, making the arrangement of the third tube more reasonable.

[0067] In some embodiments, the shockwave soot blowing system 100 further includes a sealing element (not shown in the figure), which is disposed between the blowpipe 5 and the shielding tube 6 to seal the blowpipe 5 and the shielding tube 6. Specifically, the sealing element may be aluminum silicate fiber cotton stuffed and wrapped between the outer peripheral surface of the blowpipe 5 and the outer peripheral surface of the shielding tube 6, thereby sealing the blowpipe 5 and the shielding tube 6 and preventing gas inside the blowpipe 5 or the shielding tube 6 from flowing out between the blowpipe 5 and the shielding tube 6, making the arrangement of the shockwave soot blowing system 100 more reasonable.

[0068] In some embodiments, there are multiple jet pipes 5, one end of each jet pipe 5 is connected to the shock wave generating tank 4, and the other end of each jet pipe 5 is adapted to be located inside the furnace 10, so that the shock wave generated by the shock wave generating tank 4 can be injected into the furnace 10 through the jet pipes 5. Specifically, as Figure 11 As shown, the inlets of multiple injection pipes 5 are connected to the outlet of the shock wave generator 4. The inlets of multiple injection pipes 5 extend into the furnace 10. The shock wave generated by one shock wave generator 4 can be injected into the furnace 10 through multiple injection pipes 5, thereby making the shock wave soot blowing system 100 spray more evenly, improving the spraying surface and spraying effect of the shock wave soot blowing system 100, and making it more suitable for the current situation where the proportion of Xinjiang coal blending is increasing and the ash accumulation on the heating surface, economizer and air preheater of large power plant boilers is becoming more and more serious.

[0069] In some embodiments, the injection pipe 5 is adapted to be disposed within the furnace 10 and extend circumferentially along the furnace 10. The injection pipe 5 is provided with a plurality of injection nozzles 51 arranged sequentially along the extension direction of the injection pipe 5. The plurality of injection nozzles 51 are disposed on the side of the injection pipe 5 opposite to the furnace 10. Specifically, as shown... Figure 12 As shown, the inlet of the blowpipe 5 is connected to the outlet of the shock wave generating tank 4. The blowpipe 5 is an annular pipe and is located on the inner circumferential surface of the furnace 10. Multiple blowholes 51 are evenly spaced along the circumferential surface of the furnace 10 within the inner ring of the blowpipe 5. This allows the shock wave generated in the shock wave generating tank 4 to be evenly blown into the furnace 10 through the blowholes 51 on the blowpipe 5, improving the blowing surface and blowing effect of the shock wave soot blowing system 100. This is more suitable for the current situation where the proportion of Xinjiang coal blending is increasing and the ash accumulation on the heating surfaces, economizers, and air preheaters of large power plant boilers is becoming increasingly serious.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A shock wave soot blowing system, characterized in that, include: A mixing tube having a mixing chamber adapted to mix compressed air and acetylene; Multiple turbulence springs are arranged sequentially along the radial direction of the mixing tube and disposed inside the mixing tube, so that the turbulence springs disturb the compressed air and the acetylene to ensure that the compressed air and the acetylene are fully mixed inside the mixing tube; An ignition assembly is connected to the mixing tube so that the gas mixed in the mixing tube can be ignited by the ignition assembly. A shock wave generating container, which is connected to the ignition assembly, so that the ignited gas flows into the shock wave generating container to generate shock wave energy; A jet pipe, which is adapted to be installed inside the furnace and connected to the shock wave generating tank, so that the shock wave generated by the shock wave generating tank can be injected into the furnace through the jet pipe. A shielding tube, at least a portion of which is disposed inside the jet pipe, wherein compressed air is adapted to be introduced into the shielding tube so that the compressed air isolates the shock wave generating tank from the furnace. The shielding tube includes a plurality of first shielding tubes, which are arranged at intervals along the circumference of the jet pipe on the outer circumferential surface of the jet pipe and are connected to the jet pipe. The first shielding tubes are adapted to introduce shielding air in order to prevent the high-temperature flue gas in the furnace from flowing into the shock wave generating tank. Multiple first shielding tubes are arranged at equal intervals along the circumference of the blowpipe, with a quantity of 3-5; The shielding tube includes a second shielding tube, which is disposed inside the jet pipe and extends along the axial direction of the jet pipe. The end of the second shielding tube adjacent to the shock wave generating tank is the air inlet and is suitable for introducing shielding air. The end of the second shielding tube away from the shock wave generating tank is the air outlet to prevent high-temperature flue gas in the furnace from flowing into the shock wave generating tank. The cross-sectional area of ​​the air outlet gradually decreases in the direction away from the shock wave generating tank. An air inlet duct includes a first sub-duct, a second sub-duct, a third sub-duct, and a fourth sub-duct that are interconnected with each other. The first sub-duct and the third sub-duct are respectively connected to both ends of the second sub-duct. The cross-sectional areas of the first sub-duct and the third sub-duct gradually decrease along the direction adjacent to the second sub-duct. The third sub-duct is connected to the mixing duct. One end of the fourth sub-duct is connected to the second sub-duct and is located between the first sub-duct and the third sub-duct. The first sub-duct is adapted to introduce compressed air, and the fourth sub-duct is adapted to introduce acetylene, so that the compressed air generates a negative pressure in the second sub-duct, causing the acetylene in the fourth sub-duct to be drawn into the second sub-duct. A first detection component is disposed inside the first sub-tube so that the first detection component can detect the mass flow rate of compressed air flowing through the first sub-tube; A second detection component is disposed within the fourth sub-tube to detect the mass flow rate of acetylene flowing through the fourth sub-tube.

2. The shock wave soot blowing system according to claim 1, characterized in that, The turbulence spring includes a first turbulence spring, a second turbulence spring, and a third turbulence spring that are sequentially nested together. The lengths of the first turbulence spring, the second turbulence spring, and the third turbulence spring are equal, and the pitch of the first turbulence spring, the pitch of the second turbulence spring, and the pitch of the third turbulence spring gradually increase or gradually decrease.

3. The shock wave soot blowing system according to claim 1, characterized in that, There are multiple shock wave generating canisters, and each of the multiple shock wave generating canisters is connected to the ignition assembly so that the mixed gas ignited by the ignition assembly flows into the multiple shock wave generating canisters respectively.

4. The shock wave soot blowing system according to claim 3, characterized in that, It also includes the electrical control cabinet. The ignition assembly includes a housing, multiple control valves, and an ignition unit. The housing is located adjacent to the electrical control cabinet. The multiple control valves are all located inside the housing and electrically connected to the electrical control cabinet so that the electrical control cabinet can control the opening and closing of the control valves. The multiple control valves are connected to multiple shock wave generating tanks one-to-one. The ignition unit is located inside the housing and is connected to the mixing pipe so that the mixed gas in the mixing pipe can be ignited by the ignition unit. The ignition unit is connected to multiple control valves so that the gas is ignited by the ignition unit and flows into the multiple control valves respectively.

5. The shock wave soot blowing system according to claim 4, characterized in that, There are multiple ignition units, each of which is connected to the mixing tube so that the mixed gas in the mixing tube is ignited by the multiple ignition units. Each of the multiple ignition units is connected to a corresponding control valve so that the mixed gas ignited by the ignition unit flows into the corresponding control valve.

6. The shock wave soot blowing system according to claim 1, characterized in that, There are multiple jet pipes, one end of each jet pipe is connected to the shock wave generating tank, and the other end of each jet pipe is adapted to be located inside the furnace so that the shock wave generated by the shock wave generating tank can be injected into the furnace through the jet pipes.

7. The shock wave soot blowing system according to claim 1, characterized in that, The injection pipe is adapted to be disposed inside the furnace and extend circumferentially along the furnace. The injection pipe is provided with a plurality of injection ports arranged sequentially along the extension direction of the injection pipe, and the plurality of injection ports are disposed on the side of the injection pipe away from the furnace.

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