Energy-focused shock wave generating system

Abstract

The present invention relates to the field of boiler soot blowing, specifically, a focused energy shock wave generating system, including a tank body, a pneumatic control unit and a central control unit, a cylinder body, a piston and a shock wave generating tube are arranged in the tank body, the cylinder body is arranged on the rear end sealing disk of the tank body, the shock wave generating tube is arranged on the front end sealing disk of the tank body, the piston includes a piston body and a piston end, the piston body moves in the cylinder body, and a driving cavity is formed inside the cylinder body at the rear side of the piston body, the driving cavity is controlled by the pneumatic control unit to enter or exhaust air, the shock wave generating tube is used for the piston end to move, and a focused energy cavity is formed between the shock wave generating tube, the piston, the cylinder body and the tank body, an air guide pipe connecting the driving cavity and the focused energy cavity is arranged outside the tank body, and a check valve is arranged on the air guide pipe, and an electromagnetic valve is arranged on the pneumatic control unit, and the electromagnetic valve is controlled to be on and off by the central control unit. The present invention is that the shock wave energy is stable and controllable, and can ensure the optimal soot blowing effect.

Description

Technical Field

[0001] The invention relates to the field of boiler soot blowing, in particular to an energy-focusing shock wave generating system. Background Art

[0002] During the operation of the boiler, ash or slag will accumulate on the heated surfaces of the boiler's water-cooled wall, superheater, flue and other parts, which will not only reduce the boiler's heat transfer performance and thermal efficiency, but may also cause unexpected shutdowns in serious cases, resulting in significant economic losses. Therefore, most boilers are equipped with soot blowers to remove ash or slag to ensure boiler operation. Soot blowers in the prior art mainly use steam soot blowing, sonic soot blowing, gas pulse soot blowing, air energy pulse soot blowing and other methods to achieve soot blowing operations. Among them, air energy pulse soot blowing equipment is prone to unstable soot blowing energy and reduced soot blowing efficiency due to the large temperature difference in the working environment during operation. In addition, factors such as severe air fly ash and vibration will also lead to a high failure rate of the equipment and a large maintenance workload. Summary of the invention

[0003] The purpose of the present invention is to provide an energy-focusing shock wave generating system, which first gathers compressed air through an energy-focusing chamber to achieve energy gathering, and then uses the pressure difference to drive the piston backward to disengage from the shock wave generating tube to achieve shock wave ejection. The shock wave energy is stable and controllable, and can ensure the optimal soot blowing effect.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A focused energy shock wave generating system comprises a tank body, a pneumatic control unit and a central control unit. A cylinder body, a piston and a shock wave generating tube are arranged in the tank body, and the cylinder body is fixedly arranged on the rear end sealing disk of the tank body, and the shock wave generating tube is fixedly arranged on the front end sealing disk of the tank body. The piston comprises a piston body at the rear end and a piston end at the front end. The piston body moves in the cylinder body, and a driving chamber is formed inside the cylinder body at the rear side of the piston body. The driving chamber is controlled to intake or exhaust air through the pneumatic control unit. The piston end is inserted into the shock wave generating tube. A focused energy chamber is formed between the shock wave generating tube, the piston and the outer side of the cylinder body and the tank body. An air guide pipe connecting the driving chamber and the energy focusing chamber is arranged on the outer side of the tank body, and a check valve is arranged on the air guide pipe. An electromagnetic valve is arranged on the pneumatic control unit, and the electromagnetic valve is controlled to be on and off through the central control unit.

[0006] The piston comprises a piston body, a piston middle section and a piston end, wherein the piston middle section is arranged between the piston body and the piston end, the piston middle section passes through the front end plate of the cylinder body, and the diameter of the piston middle section is larger than the inner diameter of the shock wave generating tube.

[0007] A slope is provided at the connection between the piston middle section and the piston body, and an expanded hole wall engaged with the slope is provided on the inner side of a through hole in the middle of the front end plate for the piston middle section to pass through.

[0008] A first sealing ring is sleeved on the outer side of the piston body, and a second sealing ring is sleeved on the outer side of the piston end.

[0009] An air inlet, a first through hole and a second through hole are provided on the rear end sealing plate of the tank body, and the air inlet and the first through hole are both provided in the cylinder body, and the second through hole is provided between the cylinder body and the tank body. The pneumatic control unit is connected to the air inlet through a connecting pipeline, and the first through hole is connected to the second through hole through an air guide pipe.

[0010] The pneumatic control unit is provided with a pneumatic processing element and a solenoid valve, wherein the pneumatic processing element is connected to the air inlet pipeline, and the solenoid valve is connected to the connecting pipeline.

[0011] The shock wave generating tube comprises a sealing tube section and an output tube section, wherein the output tube section is fixedly arranged on the front end sealing disk of the tank body, the sealing tube section and the output tube section are connected by bolts, and the piston end at the front end of the piston is inserted into the sealing tube section.

[0012] The advantages and positive effects of the present invention are:

[0013] 1. The present invention first uses a piston to block the shock wave generating tube, so that the energy-gathering chamber between the shock wave generating tube, the piston, the cylinder body and the tank body gathers compressed air to achieve energy gathering, and then the driving chamber in the cylinder body for the movement of the piston is exhausted, so that a pressure difference is generated between the energy-gathering chamber and the driving chamber to drive the piston to retreat. When the piston is separated from the shock wave generating tube, the high-pressure gas in the energy-gathering chamber is instantly ejected from the shock wave generating tube. The friction air generates a shock wave, forming a strong shock wave and hitting the surface of the heat exchange tube bundle through the soot blowing auxiliary equipment to achieve the best soot blowing purpose. The soot blowing energy is stable, and the soot blowing efficiency is effectively guaranteed.

[0014] 2. The present invention utilizes a central control unit to control the compressed air input of the pneumatic control unit and the on-off of the air inlet control valve, so that the energy-gathering chamber can release shock waves according to the energy release frequency designed by the programmer of the central control unit. The energy is controllable, effectively ensuring the optimal soot blowing effect, and effectively reducing air fly ash and vibration, reducing equipment failure rate, and extending equipment service life.

[0015] 3. The overall structure of the present invention is compact and easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention,

[0017] Figure 2 for Figure 1Schematic diagram of the internal structure of the tank,

[0018] Figure 3 for Figure 2 Enlarged view of point A in .

[0019] Among them, 1 is a tank body, 101 is a rear end sealing disk, 102 is a front end sealing disk, 103 is an air inlet, 104 is a second through hole, 105 is a first through hole, 2 is a pneumatic control unit, 3 is a central control unit, 4 is a connecting pipeline, 5 is a control cable, 6 is an air inlet pipeline, 7 is a cylinder body, 701 is a front end plate, 702 is a driving cavity, 8 is a shock wave generating tube, 801 is a sealing pipe section, 802 is an output pipe section, 9 is a piston, 901 is a piston body, 902 is a piston end, 903 is a piston middle section, 904 is a slope, 10 is an air guide tube, 11 is a pneumatic processing element, 12 is a solenoid valve, 13 is a check valve, 14 is a first sealing ring, 15 is a second sealing ring, and 16 is an energy gathering cavity. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 3 As shown, the present invention includes a tank body 1, a pneumatic control unit 2 and a central control unit 3. A cylinder body 7, a piston 9 and a shock wave generating tube 8 are coaxially arranged in the tank body 1, and the cylinder body 7 is fixedly arranged on the rear end sealing disk 101 of the tank body 1, and the shock wave generating tube 8 is fixedly arranged on the front end sealing disk 102 of the tank body 1. The piston 9 includes a piston body 901 at the rear end and a piston end 902 at the front end. The piston body 901 moves in the cylinder body 7, and a driving chamber 702 is formed between the piston body 901 and the rear end sealing disk 101 of the tank body 1. The pneumatic control unit 2 is connected to the central control unit 3 through a connecting pipeline 4. The driving chamber 702 is connected, the piston end 902 is arranged outside the cylinder body 7, and the shock wave generating tube 8 is used for the piston end 902 to be inserted and moved, and an energy-gathering chamber 16 is formed between the shock wave generating tube 8, the piston 9 and the outside of the cylinder body 7 and the tank body 1. An air guide tube 10 is provided on the outside of the rear end sealing disk 101 of the tank body 1, and the driving chamber 702 and the energy-gathering chamber 16 are connected through the air guide tube 10. A check valve 13 is provided on the air guide tube 10, and a solenoid valve 12 is provided on the pneumatic control unit 2, and the solenoid valve 12 is controlled on and off by the central control unit 3.

[0022] like Figure 2As shown, the piston 9 includes a piston body 901, a piston middle section 903 and a piston end 902. The piston middle section 903 is arranged between the piston body 901 and the piston end 902. The piston middle section 903 passes through the front end plate 701 of the cylinder body 7, and the diameter of the piston middle section 903 is larger than the inner diameter of the shock wave generating tube 8. A conical inclined surface 904 is provided at the connection between the piston middle section 903 and the piston body 901. The inner side of the through hole in the middle of the front end plate 701 for the piston middle section 903 to pass through is provided with an expanded hole wall engaged with the inclined surface 904. In order to ensure sealing, a first sealing ring 14 is sleeved on the outer side of the piston body 901, and a second sealing ring 15 is sleeved on the outer side of the piston end 902. In this embodiment, the tank body 1 and the main body of the cylinder body 7 are made of carbon steel material, the front end plate 701 of the cylinder body 7 is made of stainless steel material, which is corrosion-resistant, smooth and has good sealing performance. The piston 9 is made of aluminum alloy, which is flexible, light and has good sealing performance.

[0023] When the device is working, the driving chamber 702 is charged by the pneumatic control unit 2 to move the piston 9 forward and insert the piston end 902 into the shock wave generating tube 8, and Figure 3 As shown, the gas in the driving chamber 702 enters the energy-gathering chamber 16 through the air guide tube 10, so that the compressed air is gathered in the energy-gathering chamber 16 and the pressure is increased. When the designed energy release frequency is reached, the driving chamber 702 is exhausted through the pneumatic control unit 2, and the air pressure in the driving chamber 702 decreases. However, no gas is discharged from the energy-gathering chamber 16 due to the action of the check valve 13, and the interior still maintains a high-pressure state. The piston 9 retreats due to the pressure difference between the energy-gathering chamber 16 and the driving chamber 702 and causes the piston end 902 to detach from the shock wave generating tube 8. At this time, the high-pressure gas in the energy-gathering chamber 16 is ejected from the shock wave generating tube 8 to form a shock wave.

[0024] like Figures 2-3 As shown, the rear end sealing disk 101 of the tank body 1 is provided with an air inlet 103, a first through hole 105 and a second through hole 104, and the air inlet 103 and the first through hole 105 are both provided in the cylinder body 7, and the second through hole 104 is provided between the cylinder body 7 and the tank body 1, and the pneumatic control unit 2 is connected to the air inlet 103 through a connecting pipe 4, and the first through hole 105 is connected to the second through hole 104 through an air guide pipe 10. For the convenience of installation, the ends of the connecting pipe 4 and the air guide pipe 10 are both provided with quick connectors, and the check valve 13 is installed at the second through hole 104. The check valve 13 is a well-known technology in the art. In this embodiment, the check valve 13 is made of stainless steel as a whole, which is corrosion-resistant and has a low failure rate.

[0025] like Figure 2As shown, the shock wave generating tube 8 includes a sealing tube section 801 and an output tube section 802, the output tube section 802 is fixed on the front end sealing disk 102 of the tank body 1, the sealing tube section 801 and the output tube section 802 are connected by bolts, and the piston end 902 at the front end of the piston 9 moves in the sealing tube section 801. In this embodiment, the sealing tube section 801 is made of stainless steel, the inner wall is smooth and the sealing is guaranteed.

[0026] like Figure 1 As shown, the pneumatic control unit 2 is provided with a pneumatic processing element 11 and a solenoid valve 12 connected by pipelines, wherein the air inlet pipeline 6 is connected to the pneumatic processing element 11, and the solenoid valve 12 is connected to the connecting pipeline 4. The central control unit 3 is connected to the pneumatic control unit 2 through a control cable 5. The central control unit 3 can control the amount of gas passing through the pneumatic processing element 11 and the on and off of the solenoid valve 12. The central control unit 3 is provided with a programmer and a touch screen. When the amount of gas input into the energy-gathering chamber 16 reaches the energy release frequency designed by the programmer, the central control unit 3 controls the solenoid valve 12 to stop working. At this time, the gas in the driving chamber 702 is discharged into the atmosphere through the connecting pipeline 4 and the solenoid valve 12. The central control unit 3 can control a single pneumatic control unit 2, or it can control multiple pneumatic control units 2 at the same time, and each pneumatic control unit 2 corresponds to controlling a tank body 1. The pneumatic processing element 11, the solenoid valve 12 and the central control unit 3 are all well-known technologies in the art and are commercially available products.

[0027] The working principle of the present invention is:

[0028] When the present invention is working, the solenoid valve 12 in the pneumatic control unit 2 is controlled by the programmer instruction designed by the central control unit 3 to open and work, and the compressed air enters the pneumatic processing element 11 from the air inlet pipe 6 and is injected into the driving chamber 702 in the cylinder body 7 through the solenoid valve 12 and the connecting pipe 4, and pushes the piston 9 forward, so that the conical inclined surface 904 of the piston middle section 903 is embedded and sealed with the expanded hole wall on the inner side of the through hole of the front end plate 701 of the cylinder body 7, and at the same time, the piston end 902 at the front end of the piston 9 is inserted into the inner hole of the sealing pipe section 801 of the shock wave generating tube 8. At this time, the first sealing ring 14 and the second sealing ring 15 ensure the sealing, so that the energy-gathering chamber 16 is closed, and then the compressed air in the driving chamber 702 continues to enter the energy-gathering chamber 16 through the air guide pipe 10, so that the air pressure in the energy-gathering chamber 16 increases. When the input gas volume reaches the programmer instruction designed by the central control unit 3, the compressed air in the driving chamber 702 continues to enter the energy-gathering chamber 16 through the air guide pipe 10, so that the air pressure in the energy-gathering chamber 16 increases. When the energy release frequency designed by the programmable controller is reached, the solenoid valve 12 stops working, and the compressed air in the cylinder 7 is discharged through the connecting pipe 4 and discharged into the atmosphere through the solenoid valve 12. However, no gas is discharged from the energy gathering chamber 16 due to the action of the check valve 13, and the interior still maintains a high-pressure state. Since the air pressure in the driving chamber 702 is released and a pressure difference is formed with the air pressure in the energy gathering chamber 16, the piston 9 moves backward, and the piston 9 retreats slowly at the beginning due to the small pressure difference. When the pressure difference between the driving chamber 702 and the energy gathering chamber 16 reaches a certain level, the piston 9 retreats quickly and the piston end 902 quickly separates from the shock wave generating tube 8. At this time, the high-pressure gas in the energy gathering chamber 16 is instantly ejected by the shock wave generating tube 8 to generate friction air to generate a shock wave, forming a strong shock wave and hitting the surface of the heat exchange tube bundle through the soot blowing auxiliary equipment, thereby achieving the best soot blowing purpose.

Claims

1. A concentrated shock wave generating system, characterized in that: The invention comprises a tank body (1), a pneumatic control unit (2) and a central control unit (3); a cylinder body (7), a piston (9) and a shock wave generating tube (8) are arranged in the tank body (1); the cylinder body (7) is fixedly arranged on a rear end sealing disk (101) of the tank body (1); the shock wave generating tube (8) is fixedly arranged on a front end sealing disk (102) of the tank body (1); the piston (9) comprises a piston body (901) at a rear end and a piston end (902) at a front end; the piston body (901) moves in the cylinder body (7); a driving chamber (702) is formed in the cylinder body (7) at the rear side of the piston body (901); and the driving chamber (702) is arranged in the cylinder body (7) at the rear side of the piston body (901). 02) air intake or exhaust is controlled by the pneumatic control unit (2), the piston end (902) is inserted into the shock wave generating tube (8), an energy-gathering chamber (16) is formed between the shock wave generating tube (8), the piston (9) and the outside of the cylinder body (7) and the tank body (1), an air guide tube (10) connecting the driving chamber (702) and the energy-gathering chamber (16) is provided on the outside of the tank body (1), and a check valve (13) is provided on the air guide tube (10), the pneumatic control unit (2) is provided with a solenoid valve (12), and the solenoid valve (12) is controlled to be on and off by the central control unit (3); An air inlet hole (103), a first through hole (105) and a second through hole (104) are provided on the rear end sealing disk (101) of the tank body (1), and the air inlet hole (103) and the first through hole (105) are both provided in the cylinder body (7), and the second through hole (104) is provided between the cylinder body (7) and the tank body (1); the pneumatic control unit (2) is connected to the air inlet hole (103) via a connecting pipeline (4), and the first through hole (105) is connected to the second through hole (104) via an air guide pipe (10); The shock wave generating tube (8) comprises a sealing tube section (801) and an output tube section (802); the output tube section (802) is fixedly mounted on a front end sealing disk (102) of the tank body (1); the sealing tube section (801) and the output tube section (802) are connected via bolts; and a piston end (902) at the front end of the piston (9) is inserted into the sealing tube section (801).

2. The energy-focused shock wave generating system according to claim 1, characterized in that: The piston (9) comprises a piston body (901), a piston middle section (903) and a piston end (902), wherein the piston middle section (903) is arranged between the piston body (901) and the piston end (902), the piston middle section (903) passes through the front end plate (701) of the cylinder body (7), and the diameter of the piston middle section (903) is greater than the inner diameter of the shock wave generating tube (8).

3. The energy-focused shock wave generating system according to claim 2, characterized in that: A slope (904) is provided at the connection between the piston middle section (903) and the piston body (901), and a flared hole wall engaging with the slope (904) is provided on the inner side of a through hole in the middle of the front end plate (701) through which the piston middle section (903) passes.

4. The energy-focused shock wave generating system according to claim 2, characterized in that: A first sealing ring (14) is sleeved on the outer side of the piston body (901), and a second sealing ring (15) is sleeved on the outer side of the piston end (902).

5. The energy-focused shock wave generating system according to claim 1, characterized in that: The pneumatic control unit (2) is provided with a pneumatic processing element (11) and a solenoid valve (12), wherein the pneumatic processing element (11) is connected to the air inlet pipeline (6), and the solenoid valve (12) is connected to the connecting pipeline (4).

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