High-pressure air energy soot blower

Abstract

The invention provides a high-pressure air energy soot blower which comprises an air storage tank, a compressor and an injection assembly, the air storage tank is provided with an air inlet and an air outlet, an outlet of the compressor is connected with the air inlet so as to be used for introducing compressed gas into the air storage tank, the injection assembly comprises an injection pipe, and the injection pipe is connected with the compressor. The injection pipe comprises a first section and a second section, the first section is connected between the air outlet and the second section, the second section is provided with a plurality of injection holes which are arranged at intervals in the length direction of the injection pipe, and the pipe diameter of the second section is gradually reduced in the direction from the first section to the second section. The high-pressure air energy soot blower has the advantages of being simple in structure and good in cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of soot blowers, and in particular to a soot blower using high-pressure air energy. Background Art

[0002] In energy recovery systems such as thermal power plants and industrial boilers, air preheaters (air preheaters) are widely used to recover heat from flue gas and use it to preheat the air entering the combustion system to improve the efficiency of thermal energy utilization. Soot blowing methods in related technologies, such as compressed air, steam or mechanical vibration, can remove ash accumulation to a certain extent, but they often face problems such as uneven cleaning effect, high energy consumption, and frequent maintenance. Especially in air preheaters with long tubes and complex porous structures, traditional methods are difficult to ensure uniform and thorough cleaning effects. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention provides a soot blower powered by high-pressure air, which has the advantages of simple structure and good cleaning effect.

[0004] The high-pressure air energy soot blower of the embodiment of the present invention comprises:

[0005] An air storage tank having an air inlet and an air outlet;

[0006] A compressor, wherein the outlet of the compressor is connected to the air inlet so as to introduce compressed gas into the air storage tank;

[0007] The injection assembly comprises an injection pipe, wherein the injection pipe comprises a first section and a second section, wherein the first section is connected between the air outlet and the second section, and the second section has a plurality of injection holes, wherein the plurality of injection holes are arranged at intervals along the length direction of the injection pipe, and in the direction from the first section to the second section, the pipe diameter of the second section gradually decreases.

[0008] The high-pressure air-powered sootblower compressor of the embodiment of the present invention compresses the air, stores it in the air storage tank, and then transmits it to the second section through the first section of the injection pipe, thereby ensuring the continuous supply of gas. The diameter of the second section of the injection pipe gradually decreases, so that the gas flow rate in the second section reaches the maximum value at the injection hole, and the pressure is reduced at the same time, which is conducive to generating high-speed and high-pressure airflow, thereby improving the sootblowing efficiency.

[0009] In some embodiments, the injection assembly further includes a control valve connected to the first section for controlling a gas flow rate in the first section.

[0010] In some embodiments, the injection assembly also includes a detection component, which is connected to the first section and located downstream of the control valve. The detection component is electrically connected to the control valve so that the detection component transmits detection information to the control valve, and the control valve controls the opening and closing degree of the valve according to the detection information.

[0011] In some embodiments, the high-pressure air-powered sootblower of the embodiment of the present invention further comprises a plurality of injection hole groups, wherein the plurality of injection hole groups are arranged at intervals along the circumference of the injection pipe, and one injection control group comprises a plurality of the injection holes.

[0012] In some embodiments, a radial direction of the injection hole and a radial direction of the injection pipe form an included angle.

[0013] In some embodiments, in one injection hole group, the angle between the radial directions of two adjacent injection holes is greater than 0 degree and less than 90 degrees.

[0014] In some embodiments, the injection holes are arranged radially in parallel.

[0015] In some embodiments, the diameter of the injection hole gradually decreases along the flow direction of the airflow.

[0016] In some embodiments, the high-pressure air-powered soot blower of an embodiment of the present invention also includes a moving component, which includes a fixed seat, a moving seat and a moving drive component, the moving seat connects the injection assembly and the fixed seat, and the moving drive component is connected to the moving seat to drive the moving seat to move on the fixed seat.

[0017] In some embodiments, there are multiple air storage tanks, and at least one of the multiple air storage tanks introduces mixed gas into the injection pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a high-pressure air energy soot blower according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0020] Figure 3 It is a schematic diagram of the arrangement of injection holes of a high-pressure air energy soot blower according to another embodiment of the present invention.

[0021] Reference numerals:

[0022] 1. Air storage tank, 11. Air inlet, 12. Air outlet,

[0023] 2. Compressor,

[0024] 3. Injection assembly, 31. Injection pipe, 311. First section, 312. Second section, 313. Injection hole, 314. Control valve, 315. Detection part,

[0025] 4. Moving assembly, 41. Fixed seat, 42. Moving seat. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] like Figure 1-Figure 3 As shown, the high-pressure air energy soot blower according to the embodiment of the present invention comprises: an air storage tank 1 , a compressor 2 and an injection assembly 3 .

[0028] The air storage tank 1 has an air inlet 11 and an air outlet 12. The outlet of the compressor 2 is connected to the air inlet 11 for introducing compressed gas into the air storage tank 1. The injection assembly 3 includes an injection pipe 31, and the injection pipe 31 includes a first section 311 and a second section 312. The first section 311 is connected between the air outlet 12 and the second section 312. The second section 312 has a plurality of injection holes 313. The plurality of injection holes 313 are arranged along the length direction of the injection pipe 31 (such as Figure 1 The first section 311 and the second section 312 are arranged at intervals (in the left and right direction), and the diameter of the second section 312 gradually decreases in the direction from the first section 311 to the second section 312.

[0029] Specifically, Figure 1 As shown, the air inlet 11 of the air storage tank 1 is connected to the outlet of the compressor 2 through a pipeline so as to receive the compressed gas generated by the compressor 2, and the air outlet 12 is connected to the first section 311 of the injection assembly 3 so as to transmit the compressed gas in the air storage tank 1 to the injection assembly 3. The injection pipe 31 is composed of a first section 311 and a second section 312. The first section 311 is connected between the air outlet 12 of the air storage tank 1 and the second section 312 of the injection pipe 31. The second section 312 has a plurality of injection holes 313, and the plurality of injection holes 313 are arranged at intervals along the length direction of the injection pipe 31.

[0030] Preferably, there are multiple air storage tanks 1, and at least one of the multiple air storage tanks 1 feeds the mixed gas into the injection pipe 31. It can be understood that by using multiple air storage tanks 1, the continuity and stability of the gas supply can be ensured, and the interruption of injection due to insufficient pressure in a single tank can be avoided.

[0031] In addition, the design of multiple tanks provides redundancy. Even if one tank fails, other tanks can continue to supply mixed gas, improving the reliability of the system. Of course, different tanks can be flexibly switched according to actual needs, for example, when the backup tank is full, or when the main tank is maintained, the backup tank is used.

[0032] It is understandable that the air storage tank 1 can collect and store the compressed gas discharged by the compressor 2, and a pressure detector is provided on the air storage tank 1 to detect the gas pressure condition in the air storage tank 1 and provide a reference value for subsequent gas discharge. The pressurized gas in the air storage tank 1 is discharged to the injection pipe 31 through the gas outlet 12, and the pressurized gas is discharged to the air preheater through the first section 311 and the second section 312 in turn for cleaning. Among them, since the diameter of the second section 312 of the injection pipe 31 gradually decreases in the direction of gas flow (i.e., from left to right), the gas flow rate can be further increased, which is beneficial to the cleaning of the air preheater.

[0033] In other words, the high-pressure air energy sootblower compressor 2 of the embodiment of the present invention compresses the air, stores it through the air storage tank 1, and then transmits it to the second section 312 through the first section 311 of the injection pipe 31, ensuring the continuous supply of gas. The diameter of the second section 312 of the injection pipe 31 gradually decreases, so that the gas flow rate in the second section 312 reaches the maximum value at the injection hole 313, and the pressure is reduced, which is conducive to generating high-speed and high-pressure airflow, thereby improving the sootblowing efficiency.

[0034] In some embodiments, the injection assembly 3 further includes a control valve 314 , which is connected to the first section 311 to control the gas flow rate in the first section 311 .

[0035] It is understandable that if Figure 1 As shown, the control valve 314 is connected to the wall of the first section 311, and the control valve 314 can adjust the gas flow rate in the first section 311 as needed, so as to accurately control the air flow speed and pressure sprayed onto the inner surface of the air preheater. In addition, by adjusting the gas flow rate, the impact force of the air flow on the inner surface of the air preheater can be optimized to improve the cleaning effect. In other words, under different working conditions, the air flow speed can be adjusted by the control valve 314 to meet different soot blowing requirements.

[0036] In other words, the control valve 314 can adjust the gas flow rate as needed to avoid unnecessary energy waste, thereby saving energy consumption. The control valve 314 can also prevent the gas flow rate from being too high or too low, thereby avoiding equipment damage or safety accidents caused by improper flow rate.

[0037] In some embodiments, the injection assembly 3 also includes a detection component 315, which is connected to the first section 311 and located downstream of the control valve 314. The detection component 315 is electrically connected to the control valve 314 so that the detection component 315 transmits detection information to the control valve 314, and the control valve 314 controls the opening and closing degree of the valve door 314 according to the detection information.

[0038] It is understandable that the detection element 315 can monitor the gas flow rate through the first section 311 in real time and transmit the detection information to the control valve 314. The control valve 314 automatically adjusts the opening and closing degree of the valve according to the detection information to ensure that the gas flow rate remains stable. Therefore, by accurately controlling the gas flow rate, the impact force of the air flow on the inner surface of the air preheater can be optimized to improve the cleaning effect.

[0039] In some embodiments, the high-pressure air-powered sootblower of the present invention further comprises a plurality of injection hole 313 groups, wherein the plurality of injection hole 313 groups are arranged at intervals along the circumference of the injection pipe 31 , and one injection control group comprises a plurality of injection holes 313 .

[0040] Optionally, the radial direction of the injection hole 313 and the radial direction of the injection pipe 31 have an angle. Figure 2 As shown, there is an angle between the injection hole 313 and the radial direction of the injection pipe 31, so that the opening directions of the multiple injection holes 313 can be the same or different, that is, the opening directions of the multiple injection holes 313 are the same, and the radial directions of the multiple injection holes 313 are arranged in parallel. In order to effectively cover the inner surface of the air preheater, and according to the different internal structures of the air preheater, injection holes 313 with different radial inclination degrees can be selected to increase the breadth of the cleaning range by changing the airflow direction, ensuring that the airflow can reach more areas of the inner surface of the air preheater.

[0041] In some other embodiments, in one group of injection holes 313 , the angle between the radial directions of two adjacent injection holes 313 is greater than 0 degree and less than 90 degrees.

[0042] like Figure 3 As shown, the radial angle between two adjacent injection holes 313 is α, so that the angle design between adjacent injection holes 313 ensures the uniform distribution of airflow on the inner surface of the air preheater and reduces the cleaning dead angle. Since the angle between the injection holes 313 is greater than 0 degrees and less than 90 degrees, it is ensured that there is no relative arrangement between the injection holes 313, so that the airflows generated by adjacent injection holes 313 will not directly collide, reducing the interference between the airflows and improving the cleaning efficiency.

[0043] Of course, depending on the internal structure of the air preheater, a specific angle design may also be involved to help optimize the angle of the injected airflow so that the airflow can better adapt to the shape of the inner surface of the air preheater and improve the cleaning effect.

[0044] In some embodiments, the aperture of the injection hole 313 gradually decreases in the direction of the airflow. It is understandable that the aperture of the injection hole 313 gradually decreases in the direction of the airflow, that is, the aperture value gradually decreases from the inlet end to the outlet end of the injection hole 313. That is, according to the Bernoulli principle, when the gas passes through the gradually decreasing aperture, the flow rate will increase. This means that the airflow will reach a higher speed at the outlet end of the injection hole 313, thereby enhancing the soot blowing effect.

[0045] In addition, the high-speed airflow generates a stronger impact force at the outlet end of the injection hole 313, which can more effectively remove the dust accumulated on the inner surface of the air preheater.

[0046] In some embodiments, the high-pressure air-powered soot blower of an embodiment of the present invention also includes a moving component 4, which includes a fixed seat 41, a moving seat 42 and a moving drive component. The moving seat 42 connects the injection component 3 and the fixed seat 41, and the moving drive component is connected to the moving seat 42 to drive the moving seat 42 to move on the fixed seat 41.

[0047] It is understandable that if Figure 1 As shown, the fixed seat 41 is connected to the moving seat 42 as the fixed part of the moving assembly 4, and provides a fixed base for the moving seat 42. The moving seat 42 connects the injection assembly 3 and the fixed seat 41, and can move relative to the fixed seat 41. The moving drive is connected to the moving seat 42 to drive the moving seat 42 to move on the fixed seat 41.

[0048] That is to say, the moving assembly 4 can drive the injection assembly 3 to move in the left and right directions, so that different areas of the air preheater can be cleaned. In addition, the design of the moving assembly 4 enables the soot blower to adapt to air preheaters of different sizes and shapes, and to perform cleaning operations at different positions. Therefore, through the moving action of the moving assembly 4 on the injection assembly 3, the soot blower can more effectively cover all areas of the air preheater, improve cleaning efficiency, and reduce dust accumulation.

[0049] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A soot blower powered by high pressure air, characterized in that: include: An air storage tank having an air inlet and an air outlet; A compressor, wherein the outlet of the compressor is connected to the air inlet so as to introduce compressed gas into the air storage tank; The injection assembly comprises an injection pipe, wherein the injection pipe comprises a first section and a second section, wherein the first section is connected between the air outlet and the second section, and the second section has a plurality of injection holes, wherein the plurality of injection holes are arranged at intervals along the length direction of the injection pipe, and in the direction from the first section to the second section, the pipe diameter of the second section gradually decreases.

2. The high-pressure air energy sootblower according to claim 1, characterized in that: The injection assembly further includes a control valve connected to the first section for controlling the gas flow rate in the first section.

3. The high-pressure air energy sootblower according to claim 2, characterized in that: The injection assembly also includes a detection component, which is connected to the first section and located downstream of the control valve. The detection component is electrically connected to the control valve so that the detection component transmits detection information to the control valve, and the control valve controls the opening and closing degree of the valve according to the detection information.

4. The high-pressure air energy sootblower according to claim 3, characterized in that: It also includes a plurality of injection hole groups, which are arranged at intervals along the circumference of the injection pipe, and one injection control group includes a plurality of the injection holes.

5. The high-pressure air energy sootblower according to claim 4, characterized in that: The radial direction of the injection hole and the radial direction of the injection pipe form an included angle.

6. The high-pressure air energy sootblower according to claim 5, characterized in that: In one of the injection hole groups, the radial angle between two adjacent injection holes is greater than 0 degree and less than 90 degrees.

7. The high-pressure air energy sootblower according to claim 5, characterized in that: The injection holes are arranged in radial direction in parallel.

8. The high-pressure air energy sootblower according to claim 6 or 7, characterized in that: The diameter of the injection hole gradually decreases along the direction of the air flow.

9. The high-pressure air energy sootblower according to claim 8, characterized in that: It also includes a moving assembly, which includes a fixed seat, a moving seat and a moving drive member. The moving seat connects the injection assembly and the fixed seat, and the moving drive member is connected to the moving seat to drive the moving seat to move on the fixed seat.

10. The high-pressure air energy sootblower according to claim 9, characterized in that: There are multiple air storage tanks, and at least one of the multiple air storage tanks introduces mixed gas into the injection pipe.

Images