A gas pulse sootblower

Abstract

The utility model relates to the technical field of soot blower, the utility model provides a gas pulse soot blower, including the mixer, igniter and pulse jar that connect in proper order, the mixer still is connected with air pipeline, air pipeline is connected with oxygen pipeline, its characterized in that, air pipeline still is connected with propane pipeline or gas pipeline, and propane pipeline or gas pipeline is located the side of oxygen pipeline, the utility model provides a gas pulse soot blower, through using propane or gas instead of acetylene etc. as combustible gas, has realized the cost reduction and benefit increase, has solved the technical problem of high cost, low safety factor and high maintenance frequency when using acetylene as combustible gas in the prior art pulse soot blower.

Description

Technical Field

[0001] This utility model relates to the field of soot blower technology, specifically to a gas pulse soot blower. Background Technology

[0002] During operation, various types of boilers and heat exchangers experience varying degrees of ash and slag buildup on their heating surfaces. Since the thermal conductivity of metal tube walls is 400-1000 times that of ash and slag, ash accumulation in boilers severely impacts heat transfer and reduces heat exchange efficiency. Using soot blowers to keep the heating surfaces clean ensures optimal heat exchange efficiency and maintains the boiler's rated output.

[0003] As a new generation of soot blowing equipment, pulse soot blowers have been recognized by users in various industries such as power, chemical, steel metallurgy, cement, glass, biomass power generation, and waste incineration power generation since their inception due to their high efficiency and intuitive soot blowing effect. Pulse soot blowers can be widely used in various types of boilers, including pulverized coal boilers, circulating fluidized bed boilers, oil-fired boilers, waste incineration boilers, biomass fuel boilers, metallurgical waste heat boilers, chemical waste heat boilers, cement waste heat boilers, roasting waste heat boilers, and heat carrier boilers, as well as in various forms of heat exchange equipment such as desulfurization devices, electrostatic precipitators, and air preheaters, bringing considerable economic and social benefits to users.

[0004] In existing technology, the principle of pulse soot blowers is to mix air and combustible gas (acetylene, hydrogen, natural gas, etc.) in a certain proportion in a mixer, and then introduce them into the pulse tank through a pipeline. After ignition, the pressure and temperature of the mixed gas in the pulse tank rise sharply in a very short time, and it expands rapidly, forming a strong compression wave, i.e., a deflagration wave. The deflagration wave is further accelerated and strengthened by the forced compression of the soot blowing pipe, and is suddenly released and ejected at the outlet of the soot blowing pipe at sonic or supersonic speeds, forming a pulse wave airflow.

[0005] However, in practice, when installing pulse soot blowers for businesses, it was found that most businesses did not have access to natural gas and instead used acetylene as a combustible gas. Acetylene is not only expensive, but it is also prone to explosion and backfire, resulting in a low safety factor. Furthermore, acetylene combustion easily leads to carbon buildup, resulting in frequent equipment maintenance and cleaning. Therefore, it is necessary to improve existing pulse soot blowers to solve these problems. Utility Model Content

[0006] To overcome the above-mentioned defects, the present invention provides a gas pulse soot blower, which solves the technical problems of high cost, low safety factor and high maintenance frequency when acetylene is used as a combustible gas in the pulse soot blower in the prior art.

[0007] According to one aspect, at least one embodiment of the present invention provides a gas pulse soot blower, comprising a mixer, an igniter and a pulse canister connected in sequence, wherein the mixer is further connected to an air pipeline, the air pipeline is connected to an oxygen pipeline, and the air pipeline is further connected to a propane pipeline or a gas pipeline, wherein the propane pipeline or the gas pipeline is located on one side of the oxygen pipeline.

[0008] As a further technical solution, the flow rate ratio of the air pipeline, the propane pipeline and the oxygen pipeline is 55 m3 / h : (4.4~5) m3 / h : (4-7) m3 / h.

[0009] As a further technical solution, the flow rate ratio of the air pipeline, the propane pipeline, and the oxygen pipeline is 55 m³ / h: 5 m³ / h: 7 m³ / h.

[0010] As a further technical solution, the flow rate ratio of the air pipeline, the gas pipeline and the oxygen pipeline is 55 m3 / h : (4.4~5) m3 / h : (4-7) m3 / h.

[0011] As a further technical solution, the flow rate ratio of the air pipeline, the gas pipeline, and the oxygen pipeline is 55 m³ / h: 5 m³ / h: 7 m³ / h.

[0012] As a further technical solution, the outlet end of the oxygen pipeline is located inside the air pipeline, and the outlet end has a plurality of outlet holes distributed circumferentially.

[0013] As a further technical solution, the first air outlet is oriented along the air flow direction of the air duct, and the first air outlet is coaxial with the air duct.

[0014] As a further technical solution, the second outlet of the propane pipeline or the gas pipeline is located inside the air pipeline, and the second outlet has a plurality of vent holes distributed circumferentially.

[0015] As a further technical solution, the second air outlet is oriented along the air flow direction of the air duct, and the second air outlet is coaxial with the air duct.

[0016] As a further technical solution, the input end of the oxygen pipeline is connected to an oxygen generator.

[0017] The beneficial effects of this utility model are as follows: In this invention, propane or methane gas has a narrower explosion range, is chemically less reactive, and reacts far less to temperature, pressure, and impact than acetylene, making it less prone to backfire and thus reducing the likelihood of accidents during use. Propane or methane gas combustion typically does not produce carbon deposits, making it less likely to leave impurities in the pulse sootblower's pipes, pulse tank, and nozzles. This reduces equipment malfunctions or reduced sootblowing efficiency caused by carbon buildup or impurities, helping to maintain stable operation and reducing the frequency of equipment cleaning and maintenance. Propane has a volumetric calorific value approximately twice that of acetylene and also has a calorific value advantage compared to natural gas. This means that less propane is consumed to achieve the same sootblowing effect, reducing operating costs. By connecting propane or methane pipelines through air pipelines, replacing acetylene in existing technologies, the problems of high cost, flammability, and carbon buildup during combustion of acetylene are solved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram illustrating the working principle of the pulse soot blower in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram illustrating the working principle of replacing the propane pipeline with a gas pipeline in the embodiment; Figure 3 This is a schematic diagram of the structure of air outlet one and air outlet two in another embodiment of this utility model; Figure 4 for Figure 3 A schematic diagram of a structure in which the propane pipeline is replaced by a gas pipeline in the embodiment; In the diagram: 1. Mixer, 2. Ignition device, 3. Pulse tank, 4. Air line, 5. Oxygen line, 6. Propane line, 51. Outlet 1, 511. Outlet 1, 61. Outlet 2, 611. Outlet 2, 7. Gas line, 8. Oxygen generator. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0021] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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 utility model.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figure 1 , Figure 2The diagram illustrates the working principle of a pulse soot blower in one embodiment of this invention. From left to right, the components are an air pipeline 4, a mixer 1, an igniter 2, and a pulse canister 3. A propane pipeline 6 or a gas pipeline 7, and an oxygen pipeline 5 are connected in parallel to the air pipeline 4. Corresponding canisters are connected to the propane pipeline 6 and the gas pipeline 7 to provide propane or gas; one of the two pipelines can be used. An oxygen generator 8 is connected to the input end of the oxygen pipeline 5. All of the above connections are made using existing methods. The difference lies in the addition of a propane pipeline 6 or a gas pipeline 7 to the air pipeline 4, replacing the expensive and unsafe acetylene used in the prior art as the source of combustible gas. Simultaneously, the propane pipeline 6 or the gas pipeline 7 is positioned on the same side as the oxygen pipeline 5 to ensure that the combustible gas and oxygen can initially contact each other before entering the mixer 1, facilitating subsequent thorough mixing. Compressed air, produced by an air compressor, is delivered through air pipeline 4. Oxygen, produced by an oxygen generator 8, enters air pipeline 4 via oxygen pipeline 5. Propane, via propane pipeline 6, or gas, via gas pipeline 7, also enters air pipeline 4. The three gases are initially mixed in air pipeline 4 and then enter mixer 1. After thorough mixing in mixer 1, the mixture is delivered to igniter 2, which ignites the gas mixture. The ignited gas then enters pulse tank 3, where a deflagration wave is formed, ultimately achieving soot blowing. The flow rate ratio of air pipeline 4, propane pipeline 6 or gas pipeline 7, and oxygen pipeline 5 is 55 m³ / h : (4.4~5) m³ / h : (4-7) m³ / h. Preferably, it is 55 m³ / h : 5 m³ / h : 7 m³ / h.

[0027]

[0028] Table 1. Ash removal results under different flow rates As shown in Table 1, the average ash removal rate of the experimental group (meeting the claimed proportions) reached 92%~96%, significantly higher than the 70%~85% of the control group, which deviated from this proportion. When the propane flow rate was lower than 4.4 m3 / h (control group 2) or higher than 5 m3 / h (control group 1), or the oxygen flow rate was lower than 4 m3 / h (control group 4) or higher than 7 m3 / h (control group 3), the removal rate decreased significantly. This indicates that the flow rates of propane and oxygen need to be matched within the range defined in the claims to ensure the full release of gas pulse energy and achieve efficient ash removal. Among them, the ratio of experimental group 3 (55:5:7) had the highest removal rate (96%), further verifying the accuracy of this ratio in optimizing the ash removal effect.

[0029]

[0030] Table 2 Propane combustion at different flow rates Table 2 shows that the unburned propane content in experimental groups 1-3 was all <0.5%, indicating a balanced ratio of fuel gas to oxygen, complete combustion, no energy waste, and extremely low unburned gas residue, thus avoiding safety risks caused by gas accumulation. In the control group, when the propane flow rate was too high (control group 1) or the oxygen flow rate was too low (control group 4), the unburned propane content reached 3.2% and 5.1%, respectively, which not only caused energy waste but also increased safety hazards such as explosion and backfire due to unburned gas residue. The conclusion shows that the limited flow ratio, through precise control of the ratio of fuel gas to oxidizer, achieved a highly efficient and safe combustion process, which is significantly better than the ratio scheme that deviates from this range.

[0031] In this embodiment, propane or gas has a narrower explosion range, is chemically less reactive, and reacts much less to temperature, pressure, and impact than acetylene, making it less prone to backfire and thus reducing the likelihood of accidents during use. Propane or gas combustion typically does not produce carbon deposits, making it less likely to leave impurities in the pulse sootblower's pipes, pulse tank 3, and nozzles. This reduces the risk of equipment malfunctions or reduced sootblowing performance due to carbon buildup or impurities, helping to maintain stable operation and reducing the frequency of equipment cleaning and maintenance. Propane has a volumetric calorific value approximately twice that of acetylene and also has a calorific value advantage compared to natural gas. This means that less propane is consumed to achieve the same sootblowing effect, reducing operating costs. Connecting propane pipe 6 or gas pipe 7 via air pipe 4 replaces acetylene in existing technologies, solving the problems of high cost, flammability, and carbon buildup associated with acetylene combustion.

[0032] In this embodiment, by limiting the flow rate ratio of air pipeline 4, propane pipeline 6 or gas pipeline 7, and oxygen pipeline 5 to 55 m³ / h: 5 m³ / h: 7 m³ / h, this specific ratio ensures that the air, propane, and oxygen mix to achieve optimal combustion, significantly improving combustion efficiency, generating stronger energy, producing a higher intensity deflagration wave within the pulse tank 3, and achieving better soot blowing. Simultaneously, this ratio results in more complete combustion, less unburned gas residue, minimizes carbon buildup, significantly reduces equipment maintenance and cleaning frequency, extends equipment lifespan, and ensures safer and more reliable equipment operation.

[0033] like Figure 3 , Figure 4 As shown, this diagram illustrates the specific structure of outlet end 51 and outlet end 61 in one embodiment of this invention. Outlet end 51 of the oxygen pipeline 5 is located within the air pipeline 4, and it has several circumferentially distributed outlet holes 511, allowing oxygen to enter the air pipeline 4 from multiple directions. The orientation of outlet end 51 is aligned with the airflow direction of the air pipeline 4, and outlet end 51 is coaxial with the air pipeline 4. The arrangement of outlet end 61 and outlet holes 611 is the same as described above.

[0034] In this embodiment, oxygen, propane, or gas can be ejected from multiple circumferential positions through several vent holes 511 and 611, significantly increasing the contact area with air, resulting in more uniform mixing, ensuring complete combustion, and reducing energy waste and carbon buildup. By defining the orientation and axial relationship of vent holes 511 and 611, the ejection direction of oxygen, propane, or gas is aligned with the airflow direction, and they are ejected circumferentially from the axis of air pipe 4, further improving the uniformity and efficiency of mixing oxygen, propane, or gas with air. This leads to higher combustion efficiency, more stable soot blowing, and less carbon buildup.

[0035] Alternatively, coke oven gas or liquefied petroleum gas can be used to replace propane or coal gas.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas pulse soot blower, comprising a mixer (1), an igniter (2), and a pulse canister (3) connected in sequence, wherein the mixer (1) is further connected to an air line (4), and the air line (4) is connected to an oxygen line (5), characterized in that, The air line (4) is also connected to a propane line (6) or a gas line (7), the propane line (6) or the gas line (7) being located on one side of the oxygen line (5), the propane line (6) or the gas line (7).

2. A gas pulse soot blower according to claim 1, characterized in that, The flow rate ratio of the air pipeline (4), the propane pipeline (6), and the oxygen pipeline (5) is 55 m3 / h: (4.4~5) m3 / h: (4-7) m3 / h.

3. A gas pulse soot blower according to claim 1 or 2, characterized in that, The flow rate ratio of the air pipeline (4), the propane pipeline (6), and the oxygen pipeline (5) is 55 m3 / h: 5 m3 / h: 7 m3 / h.

4. A gas pulse soot blower according to claim 1, characterized in that, The flow rate ratio of the air pipeline (4), the gas pipeline (7) and the oxygen pipeline (5) is 55 m3 / h: (4.4~5) m3 / h: (4-7) m3 / h.

5. A gas pulse soot blower according to claim 1 or 4, characterized in that, The flow rate ratio of the air pipeline (4), the gas pipeline (7) and the oxygen pipeline (5) is 55 m3 / h: 5 m3 / h: 7 m3 / h.

6. A gas pulse soot blower according to claim 1, characterized in that, The outlet end (51) of the oxygen pipeline (5) is located inside the air pipeline (4), and the outlet end (51) has a plurality of outlet holes (511) distributed circumferentially.

7. A gas pulse soot blower according to claim 6, characterized in that, The air outlet (51) is oriented along the air flow direction of the air duct (4), and the air outlet (51) is coaxial with the air duct (4).

8. A gas pulse soot blower according to claim 1, characterized in that, The second outlet (61) of the propane pipeline (6) or the gas pipeline (7) is located inside the air pipeline (4), and the second outlet (61) has a plurality of vent holes (611) distributed circumferentially.

9. A gas pulse soot blower according to claim 8, characterized in that, The second air outlet (61) is oriented along the air flow direction of the air duct (4), and the second air outlet (61) is coaxial with the air duct (4).

10. A gas pulse soot blower according to claim 1, characterized in that, The oxygen pipeline (5) is connected to an oxygen generator (8) at its input end.

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