Multilayer nested heavy bubble focusing enhanced shock wave soot blower

Abstract

The invention discloses a multi-layer nested heavy bubble focusing enhanced shock wave soot blower which comprises a shell, a bubble generator and an air supply system. The shell is in a cylinder shape comprising a nozzle structure, the bubble generator is of a double-layer jet flow pipeline structure installed on the inner side of the shell, the air supply system is two air supply pipelines which are arranged on the outer side of the shell and connected with the corresponding positions of the bubble generator, and the air supply pipelines are communicated with the bubble generator through channels in the shell. The multi-layer nested heavy bubble focusing enhanced shock wave soot blower has the advantages of being simple in structure, high in jet flow strength, good in durability, adjustable in outlet pressure and the like, and safe, efficient and energy-saving soot blowing work can be carried out in various special environments.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler tools, and specifically refers to a multi-layer nested heavy bubble focusing enhanced shock wave soot blower used in industries such as boilers, petroleum, metallurgy, and waste incineration, which is intended to meet the needs of removing ash and slag from boiler equipment. Background Art

[0002] In industries such as electricity and metallurgy that require large heat exchange equipment (such as boilers), dust accumulation on heat exchange surfaces is a common problem. Affected by the properties of the fuel and the heat load of the heat exchange equipment, the heat exchange surfaces of the superheater, economizer, heating furnace and other components in the boiler often accumulate dust and slag. The low thermal conductivity of the dust layer will greatly reduce the heat transfer efficiency of the heat exchange wall, and may also cause a series of problems such as excessively high exhaust gas temperature, reduced boiler efficiency, and increased coal consumption, which has a great impact on the damage to boiler equipment and the reduction of production efficiency. For this reason, various types of soot blower devices for removing dust accumulation are widely used in heat exchange equipment such as boilers.

[0003] A sootblower is a device used to remove soot from the surface of boilers and other heat exchange equipment to maintain efficient operation of boiler equipment. With the advancement of technology and the improvement of environmental protection requirements, sootblower has gone through several stages of development, and new technologies and designs are continuously introduced into the market. Among various sootblower, shock wave sootblower has been widely used due to its advanced sootblowing mechanism and good sootblowing effect.

[0004] The principle of shock wave soot blower is to generate high-pressure and high-speed airflow through shock wave, exerting a greater impact on the soot scale on the surface of the equipment, thereby destroying the adhesion of the soot scale to the equipment and causing the soot scale to fall off. According to the different working media, shock wave soot blowers can be divided into gas shock wave soot blowers and air shock wave soot blowers. Compared with gas shock wave soot blowers, air shock wave soot blowers do not undergo chemical reactions inside, are safer and less prone to clogging, so they can be used in environments with flammable and explosive gases, and have a wider range of applications.

[0005] On this basis, a multi-layer nested heavy bubble focusing enhanced shock wave sootblowing technology fully utilizes the focusing effect of the incident shock wave inside the heavy bubble. Multi-layer gases of different densities can make the incident shock wave have a strong convergence effect, thereby generating a larger transient high-pressure and high-speed gas jet, achieving a stronger impact force and better sootblowing effect. Compared with traditional shock wave sootblower, multi-layer nested heavy bubble focusing enhanced shock wave sootblower can achieve higher sootblowing performance at a lower cost. In addition, the initial shock wave intensity required by this method can also be lower, which not only saves energy but also improves safety. Therefore, the multi-layer nested heavy bubble focusing enhanced shock wave sootblower is a new type of sootblowing equipment that is efficient, safe and environmentally friendly. No related reports have been seen so far. Summary of the invention

[0006] The purpose of the present invention is to provide a novel multi-layer nested heavy bubble focusing enhanced shock wave sootblower, which utilizes the focusing effect of multiple layers of bubbles to generate high-pressure and high-speed jets to achieve efficient, safe and energy-saving sootblowing work and adapt to various special conditions.

[0007] The present invention is achieved through the following technical solutions:

[0008] A multi-layer nested heavy bubble focusing enhanced shock wave soot blower comprises a shell, a bubble generator and an air supply system. The shell is connected to the bubble generator, and the bubble generator is connected to the air supply system.

[0009] The shell includes a shell, a nozzle section, a shock wave generator, a pressure relief valve and a pressure sensor; the shell and the nozzle section are connected together to form the container body of the soot blower; the shock wave generator is installed at the center position corresponding to the nozzle at the bottom of the shell, and the pressure relief valve and the pressure sensor are arranged on the shell.

[0010] The bubble generator is a double-layer jet pipe structure, which is installed on the inner wall of the shell, and includes an outer pipe, an inner pipe and a position regulator; the inner pipe is fixed to the upper surface of the position regulator, the position regulator is fixed to the inner surface of the shell, and the inner pipe and the position regulator are both arranged inside the outer pipe; the outer pipe is fixed to the inner surface of the shell;

[0011] The gas supply system is installed outside the shell and includes a heavy gas intake pipeline and a light gas intake pipeline, wherein:

[0012] The heavy gas pipe connector connects the heavy gas intake pipe with the shell, and connects the heavy gas intake pipe, the shell, the channel in the position regulator and the inner pipe; the heavy gas intake pipe is also provided with a heavy gas pipe electric shut-off valve and a heavy gas pipe one-way valve, and the heavy gas pipe one-way valve is located between the heavy gas pipe electric shut-off valve and the heavy gas pipe connector;

[0013] The light gas pipe connector connects the light gas intake pipeline with the shell, and connects the light gas intake pipeline, the shell and the outer pipeline; the light gas intake pipeline is also provided with a light gas pipe electric stop valve and a light gas pipe one-way valve, and the light gas pipe one-way valve is located between the light gas pipe electric stop valve and the light gas pipe connector.

[0014] Furthermore, the shell is cylindrical with one side open at the top; the nozzle section is a hemispherical arc surface with an opening at the top, and the bottom is installed at the opening position of the shell; the bottom radius of the nozzle section is consistent with the top radius of the shell;

[0015] Furthermore, the pressure sensor is used to measure the gas pressure in the sootblower. When the gas pressure in the shell is higher than the set value, the pressure relief valve automatically opens, allowing part of the high-pressure gas to be ejected from the pressure relief valve to avoid damage to the equipment or unnecessary safety accidents.

[0016] Furthermore, the ends of the outer layer pipe and the inner layer pipe both have a necking structure.

[0017] Furthermore, the position regulator, shock wave generator, pressure sensor, heavy gas pipe electric stop valve and light gas pipe electric stop valve are connected to an external automatic control system and cooperate with each other to control the operation of the entire soot blower.

[0018] The beneficial effects of the present invention are:

[0019] The novel multi-layer nested heavy bubble focusing enhanced shock wave soot blower has the advantages of simple structure, high jet strength, good durability, adjustable outlet pressure, etc. It is specifically embodied in:

[0020] (1) The shock wave soot blower based on the multi-layer bubble focusing enhancement effect described in the present invention impacts the accumulated soot by generating a higher transient pressure and a high-speed jet through the focusing effect of the double-layer bubbles on the plane shock wave. The principle is that the eccentrically nested heavy bubbles effectively enhance the focusing effect of the shock wave. At the same time, the nozzle section can play a further converging role, thereby obtaining a higher transient impact pressure and a high-speed jet, so as to carry out soot blowing.

[0021] (2) The shock wave soot blower based on the multi-layer bubble focusing enhancement effect described in the present invention adopts double-layer bubble focusing to enhance the shock wave intensity and obtain a higher transient pressure. Compared with a single-layer bubble, a higher focusing pressure can be obtained and expensive heavy bubble resources can be saved. While increasing the soot blowing pressure, the cost can be reduced and the strength requirement for the plane shock wave can be reduced.

[0022] (3) The shock wave soot blower based on the multi-layer bubble focusing enhancement effect of the present invention adopts transient pressure and high-speed gas jet to perform soot blowing operation. The jet will naturally disperse after soot blowing, and will not generate new solid pollutants such as soot and dust, which is easy to clean.

[0023] (4) The shock wave soot blower based on the multi-layer bubble focusing enhancement effect described in the present invention dynamically adjusts the operation conditions of the position regulator, the light gas pipe electric stop valve and the heavy gas pipe electric stop valve through the overall monitoring system, and dynamically adjusts the nested structure of the double-layer bubbles to obtain the optimal focusing pressure and jet intensity under different working conditions, while adapting to different working conditions.

[0024] (5) The shock wave soot blower based on the multi-layer bubble focusing enhancement effect of the present invention has a pressure relief valve that can set the pressure range, which can ensure that the soot blower operates under a safe pressure and improve the safety performance of the entire soot blowing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] In the figure: 1-shell, 2-nozzle section, 3-shock generator, 4-pressure relief valve, 5-pressure sensor, 6-outer pipe, 7-inner pipe, 8-position regulator, 9-light gas inlet pipe, 10-heavy gas inlet pipe, 11-light gas pipe electric stop valve, 12-light gas pipe single-phase valve, 13-light gas pipe connector, 14-heavy gas pipe electric stop valve, 15-heavy gas pipe single-phase valve, 16-heavy gas pipe connector. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 The present invention is further described:

[0028] like Figure 1 As shown, a novel multi-layer nested heavy bubble focusing enhanced shock wave soot blower includes a shell, a bubble generator and an air supply system.

[0029] The shell is a hollow cylinder with a nozzle structure on one side of the top surface, including a shell 1, a nozzle section 2, a shock wave generator 3, a pressure relief valve 4 and a pressure sensor 5; the shell 1 is cylindrical, with one side of the top open; the nozzle section 2 is a hemispherical arc surface with an opening on the top, and the bottom is installed at the opening position of the shell 1; the bottom radius of the nozzle section 2 is consistent with the radius of the top surface of the shell 1; the shell 1 and the nozzle section 2 are connected together to form the container body of the soot blower; the pressure relief valve 4 and the pressure sensor 5 are arranged on the shell 1; the shock wave generator 3 is installed at the center position corresponding to the nozzle at the bottom of the shell 1;

[0030] The bubble generator is a double-layer jet pipe structure, which is installed on the inner wall of the shell 1, and includes an outer pipe 6, an inner pipe 7 and a position regulator 8; the inner pipe 7 is fixed to the upper surface of the position regulator 8; the position regulator 8 is fixed to the inner surface of the shell 1, and the inner pipe 7 and the position regulator 8 are both arranged inside the outer pipe 6; the outer pipe 6 is fixed to the inner surface of the shell 1;

[0031] The gas supply system is installed outside the shell 1, including a heavy gas intake pipeline 10, a heavy gas pipe electric stop valve 14, a heavy gas pipe one-way valve 15, a heavy gas pipe connector 16, a light gas intake pipeline 9, a light gas pipe electric stop valve 11, a light gas pipe one-way valve 12, and a light gas pipe connector 13; the gas supply system and the bubble generator are connected through a channel on the shell;

[0032] The heavy gas pipe connector 16 connects the heavy gas intake pipe 10 with the shell 1, and connects the heavy gas intake pipe 10, the shell 1, the channel in the position regulator 8 and the inner pipe 7; the heavy gas pipe one-way valve 15 and the heavy gas pipe electric shut-off valve 14 are located on the heavy gas intake pipe 10; the heavy gas pipe one-way valve 15 is located between the heavy gas pipe electric shut-off valve 14 and the heavy gas pipe connector 16;

[0033] The light gas pipe connector 13 connects the light gas intake pipe 9 with the shell 1, and connects the light gas intake pipe 9, the shell 1 and the outer pipe 6; the light gas pipe electric stop valve 11 and the light gas pipe one-way valve 13 are located on the light gas intake pipe 9; the light gas pipe one-way valve 12 is located between the light gas pipe electric stop valve 11 and the light gas pipe connector 13;

[0034] Furthermore, the pressure sensor 5 is used to measure the gas pressure in the sootblower. When the gas pressure in the shell 1 is higher than the set value, the pressure relief valve 4 automatically opens, so that part of the high-pressure gas is ejected from the pressure relief valve 4 to avoid damage to the equipment or unnecessary safety accidents.

[0035] Furthermore, the ends of the outer layer pipe 6 and the inner layer pipe 7 both have a constricted structure;

[0036] Specifically, the position regulator 8 is connected to the shell 1 through a hollow pipe; the position regulator 8 is connected to the inner layer pipe 7 through an intermediate channel; a circular hole is present in the shell 1 in the area between the outer layer pipe 6 and the position regulator 8;

[0037] Specifically, the heavy gas pipe connector 16 is connected to the inner layer pipe 7 in the bubble generator through the channel in the housing 1 and the position regulator 8; the light gas pipe connector 13 is connected to the outer layer pipe 6 in the bubble generator through the circular hole on the housing 1 between the outer layer pipes 6;

[0038] Furthermore, the position regulator 8, shock wave generator 3, pressure sensor 5, heavy gas pipe electric stop valve 14 and light gas pipe electric stop valve 11 are connected to an external automatic control system and cooperate with each other to control the operation of the entire sootblower.

[0039] The device described in the present invention works based on the focusing enhancement effect generated by the interaction of the incident shock wave and multiple layers of heavy bubbles. When the shock wave interacts with the heavy bubble, due to the high density inside the heavy bubble, the propagation speed of the transmitted shock wave in the heavy bubble is slow, and the internal transmitted shock wave and the external diffraction shock wave will converge near the downstream pole of the bubble, producing a phenomenon similar to a "point explosion" in the local range where the temperature and pressure increase instantaneously, and the bubble will generate a jet. When the heavy bubble is changed to an eccentric nested bubble with a light gas outer layer and a heavy gas inner layer, the transient pressure generated by the shock wave convergence is stronger, and the required heavy gas with a higher material cost is less, so that a higher transient pressure can be achieved at a lower cost.

[0040] The working principle of the device of the present invention is described below:

[0041] (1) A pressure parameter range is set for the pressure sensor 5. When the pressure in the shell 1 is higher than the upper limit of the pressure setting, the pressure relief valve 4 is opened to prevent the soot blower structure and other equipment from being damaged.

[0042] (2) Move the position regulator 8 to move the inner pipe 7 and fix it at a position opposite to the shock generator 3, so as to obtain an eccentric nested heavy bubble structure with the best focusing effect and the maximum focusing transient pressure.

[0043] (3) By controlling the opening of the light gas pipe electric stop valve 11 and the heavy gas pipe electric stop valve 14, the bubble generator forms a series of multi-layer eccentric nested heavy bubble structures with lower outer density and higher inner density at the outlet of the outer pipe 6.

[0044] (4) After several layers of eccentrically nested heavy bubbles are generated, the light gas pipe electric stop valve 11 and the heavy gas pipe electric stop valve 14 are closed.

[0045] (5) Turn on the shock wave generator 3 to generate a shock wave, which interacts with the multiple multi-layer nested heavy bubbles generated by the bubble generator. The shock wave is focused inside the bubble, generating a high transient pressure shock and a high-speed gas jet, and a soot blower is emitted through the nozzle section 2 to perform soot blowing.

[0046] (6) After a sootblowing operation is completed, the sootblower is moved and steps (2) to (5) are repeated to continue the sootblowing operation.

[0047] (7) After several cleanings, remove the soot blower and clean it.

[0048] The functions of the automatic control system are as follows:

[0049] (1) Control the opening degree and opening time of the light gas pipe electric stop valve 11 and the heavy gas pipe electric stop valve 14 to adjust the size of the bubbles.

[0050] (2) Changing the horizontal position of the position regulator 8, and adjusting the relative position relationship between the outer layer pipe 6 and the inner layer pipe 7 to adjust the relative nesting structure of the bubbles, so that the outer layer pipe 6 and the inner layer pipe 7 are in a concentric or eccentric circle position relationship.

[0051] (3) Monitor the data of pressure sensor 5 and open the pressure relief valve in time to protect the soot blower structure.

[0052] (4) Control the time and intensity of the shock wave generated by the shock wave generator 3 so that the bubbles and shock waves can produce a better focusing pressure effect.

Claims

1. A multi-layer nested heavy bubble focusing enhanced shock wave sootblower, characterized in that: It includes a shell, a bubble generator and an air supply system; the shell is connected to the bubble generator, and the bubble generator is connected to the air supply system; The specific structure is: The shell comprises a shell (1), a nozzle section (2), a shock wave generator (3), a pressure relief valve (4) and a pressure sensor (5); the shell (1) and the nozzle section (2) are connected together to form a container body of the soot blower; the shock wave generator (3) is installed at a central position corresponding to the nozzle at the bottom of the shell (1); the pressure relief valve (4) and the pressure sensor (5) are arranged on the shell (1); The bubble generator is a double-layer jet pipe structure, which is installed on the inner side wall of the shell (1), and comprises an outer layer pipe (6), an inner layer pipe (7) and a position regulator (8); the inner layer pipe (7) is fixed to the upper surface of the position regulator (8), the position regulator (8) is fixed to the inner surface of the shell (1), and the inner layer pipe (7) and the position regulator (8) are both arranged inside the outer layer pipe (6); the outer layer pipe (6) is fixed to the inner surface of the shell (1); The gas supply system is installed outside the shell (1), and comprises a heavy gas intake pipeline (10) and a light gas intake pipeline (9), wherein the heavy gas pipe connector (16) connects the heavy gas intake pipeline (10) with the shell (1), and connects the heavy gas intake pipeline (10), the shell (1), the channel in the position regulator (8) and the inner layer pipeline (7); the light gas pipe connector (13) connects the light gas intake pipeline (9) with the shell (1), and connects the light gas intake pipeline (9), the shell (1) and the outer layer pipeline (6).

2. The multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to claim 1, characterized in that: The heavy gas inlet pipeline (10) is also provided with a heavy gas pipe electric stop valve (14) and a heavy gas pipe one-way valve (15), and the heavy gas pipe one-way valve (15) is located between the heavy gas pipe electric stop valve (14) and the heavy gas pipe connector (16); The light gas inlet pipeline (9) is also provided with a light gas pipe electric stop valve (11) and a light gas pipe one-way valve (12), and the light gas pipe one-way valve (12) is located between the light gas pipe electric stop valve (11) and the light gas pipe connector (13).

3. The multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to claim 1, characterized in that: The shell (1) is cylindrical, with one side of the top open; the nozzle section (2) is a hemispherical arc surface with an open top, and the bottom is installed at the opening position of the shell (1); the bottom radius of the nozzle section (2) is consistent with the top radius of the shell (1).

4. The multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to claim 1, characterized in that: The pressure sensor (5) is used to measure the gas pressure in the soot blower. When the gas pressure in the shell (1) is higher than a set value, the pressure relief valve (4) automatically opens, allowing part of the high-pressure gas to be ejected from the pressure relief valve (4).

5. The multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to claim 1, characterized in that: The ends of the outer layer pipe (6) and the inner layer pipe (7) both have a constricted structure.

6. The multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to claim 1, characterized in that: The position regulator (8), shock wave generator (3), pressure sensor (5), heavy gas pipe electric stop valve (14) and light gas pipe electric stop valve (11) are connected to an external automatic control system and cooperate with each other to control the operation of the entire igniter.

7. The working method of the multi-layer nested heavy bubble focusing enhanced shock wave sootblower according to any one of claims 1 to 6, characterized in that: (1) changing the horizontal position of the position regulator (8) and adjusting the relative position relationship between the outer layer pipe (6) and the inner layer pipe (7) to adjust the relative nesting structure of the bubbles so that the outer layer pipe (6) and the inner layer pipe (7) are in a concentric or eccentric position relationship; (2) by controlling the opening of the light gas pipe electric stop valve 11 and the heavy gas pipe electric stop valve 14, the bubble generator forms a series of multi-layer eccentric nested heavy bubble structures with lower outer density and higher inner density at the outlet of the outer layer pipe (6); (3) After several layers of eccentrically nested heavy bubbles are generated, the light gas pipe electric stop valve (11) and the heavy gas pipe electric stop valve (14) are closed; (4) Turning on the shock wave generator (3) to generate a shock wave, which reacts with the multiple multi-layer nested heavy bubbles generated by the bubble generator, and the shock wave is focused inside the bubble, generating a high transient pressure shock and a high-speed gas jet, and a soot blower is emitted through the nozzle section (2) to perform soot blowing; (5) After the soot blowing is completed, the soot blower is moved and steps (2) to (5) are repeated to continue the soot blowing work; (6) After several cleanings, remove the soot blower and clean it; In this process, a pressure parameter range is set for the pressure sensor (5), and when the pressure in the shell (1) is higher than the upper limit of the pressure setting, the pressure relief valve (4) is opened to prevent the soot blower structure and other equipment from being damaged.

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