Steam soot blower system and boiler system

Abstract

The utility model discloses a steam soot blowing system and boiler system.The steam soot blowing system comprises an air inlet pipe, a pressure reducing valve and a soot blower, the air inlet pipe is suitable for being communicated with a high-temperature superheater so that steam flowing out of the high-temperature superheater can flow into the air inlet pipe, and the pressure reducing valve is communicated with the air inlet pipe; the soot blower comprises a long telescopic soot blower body and a rotary soot blower body, the long telescopic soot blower body and the rotary soot blower body are both communicated with the pressure reducing valve, so that the steam subjected to pressure reduction through the pressure reducing valve flows into the long telescopic soot blower body and the rotary soot blower body, and the rotary soot blower body is communicated with the long telescopic soot blower body and the rotary soot blower body. The long telescopic soot blower is suitable for being communicated with the evaporator or the superheater so as to blow soot to the evaporator or the superheater, and the rotary soot blower is suitable for being communicated with the economizer so as to blow soot to the economizer. The steam soot blowing system has the advantages of being simple in structure, high in safety performance, not prone to damaging the superheater and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of soot cleaning of waste heat boilers in domestic waste incineration power plants, and in particular to a steam soot blowing system and a boiler system of a waste heat boiler in a waste incineration power plant. Background Art

[0002] The boiler heating surface is a key link in the waste heat boiler utilization technology of waste incineration power plants, and plays an important role in improving boiler thermal efficiency, reducing boiler exhaust temperature, stabilizing boiler combustion, etc. For waste heat utilization, scaling of heat exchangers and economizers directly reduces heat exchange efficiency and deteriorates heat transfer performance; for production safety, scaling can lead to pipeline blockage, uneven heat transfer in pipelines, local overheating, and serious blockages may also cause perforation and leakage, bringing safety hazards to production; for production costs, in order to ensure heat exchange efficiency, frequent inspections, maintenance, and replacement of heat exchange equipment are necessary, so the stability and reliability of superheater and economizer cleaning systems are also crucial.

[0003] In the related art, the soot blowing system is not set up properly, and the superheater is easily damaged during the soot cleaning process. Utility Model Content

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] In the related art, low and medium temperature superheaters are used as heat sources for soot blowing, and steam soot blowing is intermittent. Since the amount of steam entering the high temperature superheater is reduced, it is easy to cause the high temperature superheater to overheat or even cause damage to the high temperature superheater.

[0006] To this end, an embodiment of the utility model proposes a steam soot blowing system which has a simple structure, reasonable arrangement and can ensure the service life of the superheater during the soot cleaning process.

[0007] The embodiment of the utility model provides a boiler system with long service life and low cost.

[0008] According to the steam sootblowing system of the embodiment of the utility model, it includes: an air inlet pipe, which is suitable for being connected with a high-temperature superheater so that the steam flowing out through the high-temperature superheater can flow into the air inlet pipe; a pressure reducing valve, which is connected with the air inlet pipe so that the steam flowing out through the air inlet pipe can flow into the pressure reducing valve to reduce the pressure of the steam; a sootblower, which includes a long telescopic sootblower and a rotary sootblower, and the long telescopic sootblower and the rotary sootblower are both connected with the pressure reducing valve so that the steam after the pressure reduction by the pressure reducing valve can flow into the long telescopic sootblower and the rotary sootblower, the long telescopic sootblower is suitable for being connected with an evaporator or a superheater so as to blow soot on the evaporator or the superheater, and the rotary sootblower is suitable for being connected with an economizer so as to blow soot on the economizer.

[0009] The steam sootblowing system of the utility model embodiment is provided with an air inlet pipe connected to the high-temperature superheater, so as to adopt high-temperature and high-pressure steam to provide a reliable and stable steam medium for the economizer, evaporator or superheater, so as to carry out sootblowing on the economizer, evaporator or superheater, thereby ensuring the amount of steam flowing into the air inlet pipe, preventing the high-temperature superheater from overheating, ensuring the service life of the high-temperature superheater, and ensuring the sootblowing efficiency of the steam sootblowing system.

[0010] In some embodiments, there are multiple long telescopic soot blowers and rotary soot blowers, and each evaporator or each superheater is connected to at least one long telescopic soot blower so that the rotary soot blower blows soot on the evaporator or the superheater, and each economizer is connected to at least one rotary soot blower so that the rotary soot blower blows soot on the economizer.

[0011] In some embodiments, the air intake pipe includes a first pipe, multiple second pipes and multiple third pipes, one end of the first pipe is suitable for connecting with the high-temperature superheater and the pressure reducing valve is arranged on the first pipe, one end of the multiple second pipes and one end of the multiple third pipes are connected with the first pipe, so that the steam passing through the first pipe flows into the second pipe and the third pipe respectively, the multiple second pipes are connected one-to-one with the multiple long telescopic soot blowers, so that the steam in the first pipe flows into the long telescopic soot blowers through the second pipes, and the multiple third pipes are connected one-to-one with the multiple rotary soot blowers, so that the steam in the first pipe flows into the rotary soot blowers through the third pipes.

[0012] In some embodiments, the steam sootblowing system further includes a drain box, which is adapted to be connected to the other end of the first pipe so that drain water in the first pipe flows into the drain box.

[0013] In some embodiments, the steam sootblowing system also includes a drain control component, which includes a first electric valve, a check valve and a first manual valve connected in sequence, the first electric valve is connected to the other end of the first pipe so that the drain flowing out through the first pipe flows into the first electric valve and flows into the check valve and the first manual valve in sequence through the first electric valve, and the first manual valve is connected to the drain tank so that the drain flowing out through the first manual valve flows into the drain tank.

[0014] In some embodiments, the steam soot blowing system further includes a detection component, which is disposed at the other end of the first pipe and connected to the drain tank, so that the detection component detects the temperature of drain flowing out through the first pipe, so that when the drain temperature is less than a preset value, the second pipe and the third pipe are both disconnected from the first pipe, and the first pipe is connected to the drain tank; when the drain temperature is higher than the preset value, the second pipe and the third pipe are both connected to the first pipe, and the first pipe is connected to the drain tank.

[0015] In some embodiments, the steam sootblowing system also includes a second manual valve, a second electric valve and a safety valve. The second manual valve, the second electric valve, the pressure reducing valve and the safety valve are connected in sequence. The second manual valve is connected to the high-temperature superheater through the air intake pipe, and the safety valve is connected to the sootblower through the air intake pipe, so that the opening and closing of the air intake pipe can be controlled by the second manual valve, the second electric valve and the safety valve.

[0016] In some embodiments, the steam sootblowing system further comprises a flow meter, wherein the flow meter is disposed on the air inlet pipe and at least a portion of the flow meter is communicated with the air inlet pipe so that the flow meter detects a flow rate in the air inlet pipe.

[0017] In some embodiments, the pressure of the steam flowing out after being decompressed by the pressure reducing valve is no greater than 1.8 MPa, and the temperature of the steam is no greater than 420°C.

[0018] According to the boiler system of the embodiment of the utility model, it includes: a boiler; an evaporator, a superheater and an economizer, wherein the evaporator, the superheater and the economizer are all arranged in the boiler; a steam soot blowing system, wherein the steam soot blowing system is the steam soot blowing system described in any one of the above embodiments, the air inlet pipe of the steam soot blowing system is connected to the high-temperature superheater in the superheater, the long telescopic soot blower of the steam soot blowing system is connected to the evaporator or the superheater, and the rotary soot blower of the steam soot blowing system is connected to the economizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a steam soot blowing system according to an embodiment of the utility model.

[0020] Steam soot blowing system 100;

[0021] Intake pipe 1; first pipe 11; second pipe 12; third pipe 13;

[0022] Pressure reducing valve 2;

[0023] Soot blower 3; long telescopic soot blower 31; rotary soot blower 32;

[0024] Drain control assembly 4; first electric valve 41; check valve 42; first manual valve 43;

[0025] A second manual valve 5; a second electric valve 6; a safety valve 7; a flow meter 8; and a high-temperature superheater 9. DETAILED DESCRIPTION

[0026] The 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 cannot be understood as limiting the present invention.

[0027] The steam sootblowing system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, the steam sootblowing system 100 according to the embodiment of the utility model comprises: an air inlet pipe 1 , a pressure reducing valve 2 and a sootblower 3 .

[0029] The air inlet pipe 1 is adapted to be in communication with the high temperature superheater 9 so that the steam flowing out of the high temperature superheater 9 flows into the air inlet pipe 1. Specifically, Figure 1 As shown, the inlet of the air intake pipe 1 is connected to the outlet of the high-temperature superheater 9 , and the high-temperature and high-pressure steam generated by the high-temperature superheater 9 flows into the air intake pipe 1 .

[0030] The pressure reducing valve 2 is connected to the air inlet pipe 1 so that the steam flowing out of the air inlet pipe 1 flows into the pressure reducing valve 2 to reduce the pressure of the steam. Figure 1 As shown, the pressure reducing valve 2 is an electric pressure reducing valve, and the inlet of the pressure reducing valve 2 is connected to the high-temperature superheater 9 through the intake pipe 1, so that the high-temperature and high-pressure steam in the intake pipe 1 flows into the pressure reducing valve 2, thereby reducing the pressure and cooling the high-temperature and high-pressure steam in the intake pipe 1 to a preset value.

[0031] The soot blower 3 includes a long telescopic soot blower 31 and a rotary soot blower 32. The long telescopic soot blower 31 and the rotary soot blower 32 are both connected to the pressure reducing valve 2 so that the steam after the pressure reduction by the pressure reducing valve 2 flows into the long telescopic soot blower 31 and the rotary soot blower 32. The long telescopic soot blower 31 is suitable for connecting with the evaporator or the superheater so as to blow soot on the evaporator or the superheater, and the rotary soot blower 32 is suitable for connecting with the economizer so as to blow soot on the economizer. Specifically, as Figure 1 As shown, the inlet of the long telescopic soot blower 31 and the inlet of the rotary soot blower 32 are both connected to the outlet of the pressure reducing valve 2 through the air inlet pipe 1, so that the steam after pressure reduction and cooling flows into the long telescopic soot blower 31 and the rotary soot blower 32. Since the long telescopic soot blower 31 is more expensive and has a higher dust content at a location where it is located, the telescopic movement of the long telescopic soot blower 31 can avoid being in a high smoke dust environment of the long telescopic soot blower 31 all the time. Therefore, the outlet of the long telescopic soot blower 31 is connected to the evaporator or the superheater, so as to blow soot on the evaporator or the superheater, and the outlet of the rotary soot blower 32 is connected to the economizer, so as to blow soot on the economizer, so that the blowing of different heating surfaces in different areas can be met by the long telescopic soot blower 31 and the rotary soot blower 32.

[0032] The steam sootblowing system 100 of the embodiment of the utility model is provided with an air inlet pipe 1 suitable for being connected with the high-temperature superheater 9, so as to adopt high-temperature and high-pressure steam to provide a reliable and stable steam medium for the economizer, evaporator or superheater, so as to sootblow the economizer, evaporator or superheater. Compared with the related art, the amount of steam flowing out of the high-temperature superheater 9 is relatively large (in the related art, steam extraction is performed after the medium-temperature superheater), which ensures the amount of steam flowing into the air inlet pipe 1, prevents the high-temperature superheater 9 from overheating, ensures the service life of the high-temperature superheater 9, makes the setting of the steam sootblowing system 100 more reasonable, and ensures the sootblowing efficiency of the steam sootblowing system 100.

[0033] Since there are multiple evaporators, superheaters and economizers in the boiler, in some embodiments, there are multiple long telescopic sootblowers 31 and rotary sootblowers 32, and each evaporator or each superheater is connected to at least one long telescopic sootblower 31 so that the rotary sootblower 32 can blow soot on the evaporator or superheater, and each economizer is connected to at least one rotary sootblower 32 so that the rotary sootblower 32 can blow soot on the economizer. Specifically, Figure 1As shown, there are multiple long telescopic soot blowers 31 and multiple rotary soot blowers 32, the number of multiple long telescopic soot blowers 31 is equal to the number of evaporators or superheaters, and each evaporator or superheater is connected to a long telescopic soot blower 31, and the number of rotary soot blowers 32 is equal to the number of economizers, and each economizer is connected to a rotary soot blower 32, so that the evaporator, superheater and economizer are sootblown respectively by multiple long telescopic soot blowers 31 and multiple rotary soot blowers 32, thereby ensuring the sootblowing efficiency of the sootblower 3.

[0034] In some embodiments, the air intake pipe 1 includes a first pipe 11, multiple second pipes 12 and multiple third pipes 13, one end of the first pipe 11 is suitable for connecting with the high-temperature superheater 9 and the pressure reducing valve 2 is arranged on the first pipe 11, one end of the multiple second pipes 12 and one end of the multiple third pipes 13 are connected with the first pipe 11, so that the steam passing through the first pipe 11 flows into the second pipe 12 and the third pipe 13 respectively, the multiple second pipes 12 are connected to the multiple long telescopic soot blowers 31 one by one, so that the steam in the first pipe 11 flows into the long telescopic soot blowers 31 through the second pipe 12, and the multiple third pipes 13 are connected to the multiple rotary soot blowers 32 one by one, so that the steam in the first pipe 11 flows into the rotary soot blowers 32 through the third pipe 13.

[0035] Specifically, Figure 1 As shown, the first tube 11 is an air intake main pipe and the air intake of the first tube 11 is connected to the high-temperature superheater 9, the air intake of each second tube 12 and the air intake of each third tube 13 are connected to the middle part of the first tube 11, the number of the plurality of second tubes 12 is equal to the number of the plurality of long telescopic soot blowers 31, and each long telescopic soot blower 31 is connected to the outlet of a second tube 12, the number of the plurality of third tubes 13 is equal to the number of the plurality of rotary soot blowers 32, and each rotary soot blower 32 is connected to the outlet of a third tube 13, thereby making the setting of the air intake pipe 1 more reasonable.

[0036] Because a large amount of drainage is generated in the first pipe 11 before the steam soot blowing system 100 is used, in some embodiments, the steam soot blowing system 100 further includes a drainage box, which is suitable for being connected to the other end of the first pipe 11 so that the drainage in the first pipe 11 flows into the drainage box. Figure 1 As shown, the inlet of the drain box is communicated with the outlet of the first pipe 11 , so that before the steam sootblowing system 100 is used, the drain box is communicated with the outlet of the first pipe 11 so that the drain box stores the drain in the first pipe 11 .

[0037] In some embodiments, the steam sootblowing system 100 also includes a drain control component 4, which includes a first electric valve 41, a check valve 42 and a first manual valve 43 that are connected in sequence. The first electric valve 41 is connected to the other end of the first pipe 11, so that the drain flowing out through the first pipe 11 flows into the first electric valve 41 and flows into the check valve 42 and the first manual valve 43 in sequence through the first electric valve 41. The first manual valve 43 is connected to the drain tank, so that the drain flowing out through the first manual valve 43 flows into the drain tank.

[0038] Specifically, Figure 1 As shown, the drain control component 4 includes a first electric valve 41, a check valve 42 and a first manual valve 43. The inlet of the first electric valve 41 is connected to the outlet of the first pipe 11, the outlet of the first electric valve 41 is connected to the inlet of the check valve 42, the outlet of the check valve 42 is connected to the inlet of the first manual valve 43, and the outlet of the first manual valve 43 is connected to the drain tank. Therefore, the connection between the first pipe 11 and the drain tank is controlled by the first electric valve 41 and the first manual valve 43, and the backflow of drain in the drain tank can be prevented by the check valve 42.

[0039] In some embodiments, the steam soot blowing system 100 further includes a detection component (not shown in the figure), which is arranged at the other end of the first pipe 11 and connected to the drain box, so that the detection component detects the temperature of the drain flowing out of the first pipe 11, so that when the drain temperature is less than a preset value, the second pipe 12 and the third pipe 13 are both disconnected from the first pipe 11, and the first pipe 11 is connected to the drain box; when the drain temperature is higher than the preset value, the second pipe 12 and the third pipe 13 are both connected to the first pipe 11, and the first pipe 11 is connected to the drain box. Specifically, Figure 1 As shown, the detection component can be a temperature sensor, which is arranged at the outlet end of the first tube 11 and is connected to the first tube 11, so as to detect the temperature of the hydrophobicity flowing out of the first tube 11. When the temperature of the hydrophobicity flowing out of the first tube 11 from the detection component is less than a preset value, it means that a large amount of hydrophobicity exists in the first tube 11. At this time, the first electric valve 41 and the first manual valve 43 are both opened to allow the hydrophobicity in the first tube 11 to flow into the hydrophobic tank. When the temperature of the hydrophobicity flowing out of the first tube 11 from the detection component is greater than a preset value, it means that there is less hydrophobicity in the first tube 11. At this time, at least one of the first electric valve 41 and the first manual valve 43 is closed to cut off the first tube 11 and the hydrophobic tank.

[0040] In some embodiments, the steam sootblowing system 100 further includes a second manual valve 5, a second electric valve 6 and a safety valve 7. The second manual valve 5, the second electric valve 6, the pressure reducing valve 2 and the safety valve 7 are connected in sequence. The second manual valve 5 is connected to the high-temperature superheater 9 through the air intake pipe 1, and the safety valve 7 is connected to the sootblower 3 through the air intake pipe 1, so that the opening and closing of the air intake pipe 1 can be controlled by the second manual valve 5, the second electric valve 6 and the safety valve 7. Specifically, as Figure 1 As shown, the inlet of the second manual valve 5 is connected to the high-temperature superheater 9, the outlet of the second manual valve 5 is connected to the inlet of the second electric valve 6, the outlet of the second electric valve 6 is connected to the inlet of the pressure reducing valve 2, and the outlet of the pressure reducing valve 2 is connected to the inlet of the safety valve 7. The second manual valve 5 and the second electric valve 6 are used to control the connection and disconnection of the intake pipe 1 and the pressure reducing valve 2, and the safety valve 7 is used to prevent the system from overpressure, thereby ensuring the stability of the pressure entering the soot blower 3.

[0041] In some embodiments, the steam soot blowing system 100 further includes a flow meter 8, which is disposed on the air inlet pipe 1 and at least a portion of the flow meter 8 is connected to the air inlet pipe 1, so that the flow meter 8 detects the flow in the air inlet pipe 1. Specifically, Figure 1 As shown, the flow meter 8 is provided on the intake pipe 1 and is located between the second electric valve 6 and the pressure reducing valve 2. Thus, the flow rate of steam in the intake pipe 1 is detected by the flow meter 8, thereby controlling the opening of the second manual valve 5 and the second electric valve 6 to control the flow rate of the intake pipe 1.

[0042] In some embodiments, the pressure of the steam flowing out after the pressure reduction by the pressure reducing valve 2 is not greater than 1.8 MPa, and the steam temperature is not greater than 420° C. Specifically, under the action of the pressure reducing valve 2 and the safety valve 7, the pressure of the steam flowing out of the first pipe 11 is less than or equal to 1.8 MPa, and the steam temperature is less than or equal to 420° C., thereby preventing the steam soot blowing system 100 from overpressure and ensuring the service life of the steam soot blowing system 100.

[0043] In summary, the steam soot blowing system 100 of the embodiment of the utility model has a steam source from the outlet of the high-temperature superheater 9. Usually, the inlet steam source parameters required by the steam soot blowing system 100 are generally controlled in the range of 1.5-2.5MPa and a temperature of 380-420°C. The outlet pressure of the high-temperature superheater 9 is 6.4MPa and 450°C. Therefore, it is necessary to set a pressure reducing valve 2, and at the same time, a safety valve 7 is set after the pressure reducing valve 2 to prevent the system from overpressure and ensure the stability of the pressure entering the soot blower 3.

[0044] The soot blower 3 comprises a long telescopic soot blower 31 and a fixed rotary soot blower 32. The long telescopic soot blower 31 is used for soot blowing of the evaporator and various levels of superheaters, and the fixed rotary soot blower 32 is used for the economizer to meet the blowing requirements of different heating surfaces in different areas.

[0045] The air inlet pipe 1, the drain control component 4 and the drain box deliver the sootblower 3 with superheated steam that meets the requirements. When steam sootblowing starts, a large amount of drain is generated in the pipeline. Therefore, the drain control component 4 and the drain box are arranged at the end of the pipeline to recover the drain into the drain box.

[0046] The boiler system according to the embodiment of the present invention includes a boiler (not shown in the figure), an evaporator (not shown in the figure), a superheater (not shown in the figure), an economizer (not shown in the figure) and a steam soot blowing system 100.

[0047] The evaporator, superheater and economizer are all arranged in the boiler. Specifically, the evaporator may include a high-temperature evaporator, a medium-temperature evaporator and a low-temperature evaporator, the superheater includes a high-temperature superheater 9, a medium-temperature superheater and a low-temperature superheater, the economizer includes a high-temperature economizer, a medium-temperature economizer and a low-temperature economizer, and the high-temperature evaporator, the medium-temperature evaporator, the low-temperature evaporator, the high-temperature superheater 9, the medium-temperature superheater, the low-temperature superheater, the high-temperature economizer, the medium-temperature economizer and the low-temperature economizer are all arranged in the boiler.

[0048] The steam soot blowing system 100 is the steam soot blowing system 100 of any one of the above embodiments, the air inlet pipe 1 of the steam soot blowing system 100 is connected to the high-temperature superheater 9 in the superheater, the long telescopic soot blower 31 of the steam soot blowing system 100 is connected to the evaporator or the superheater, and the rotary soot blower 32 of the steam soot blowing system 100 is connected to the economizer. Thus, the evaporator, the superheater and the economizer are soot blown by the steam soot blowing system 100.

[0049] The boiler system of the embodiment of the utility model has the advantages of simple structure, high soot blowing efficiency, low cost, etc.

[0050] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 a limitation on the present invention.

[0051] 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] 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.

[0053] In the present utility model, 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.

[0054] In the present utility model, 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 utility model. 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.

[0055] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A steam sootblowing system, characterized in that: It includes: an air inlet pipe, which is suitable for being connected with a high-temperature superheater so that the steam flowing out through the high-temperature superheater can flow into the air inlet pipe; a pressure reducing valve, which is connected with the air inlet pipe so that the steam flowing out through the air inlet pipe can flow into the pressure reducing valve to reduce the pressure of the steam; a soot blower, which includes a long telescopic soot blower and a rotary soot blower, and the long telescopic soot blower and the rotary soot blower are both connected with the pressure reducing valve so that the steam after the pressure reduction by the pressure reducing valve can flow into the long telescopic soot blower and the rotary soot blower, the long telescopic soot blower is suitable for being connected with an evaporator or a superheater so as to blow soot on the evaporator or the superheater, and the rotary soot blower is suitable for being connected with an economizer so as to blow soot on the economizer.

2. The steam soot blowing system according to claim 1, characterized in that: There are multiple long telescopic soot blowers and rotary soot blowers. Each evaporator or each superheater is connected to at least one long telescopic soot blower so that the rotary soot blower can blow soot on the evaporator or the superheater. Each economizer is connected to at least one rotary soot blower so that the rotary soot blower can blow soot on the economizer.

3. The steam soot blowing system according to claim 2, characterized in that: The air intake pipe includes a first pipe, multiple second pipes and multiple third pipes, one end of the first pipe is suitable for communicating with the high-temperature superheater and the pressure reducing valve is arranged on the first pipe, one end of the multiple second pipes and one end of the multiple third pipes are both connected with the first pipe, so that the steam passing through the first pipe flows into the second pipe and the third pipe respectively, the multiple second pipes are connected one-to-one with the multiple long telescopic soot blowers, so that the steam in the first pipe flows into the long telescopic soot blowers through the second pipes, and the multiple third pipes are connected one-to-one with the multiple rotary soot blowers, so that the steam in the first pipe flows into the rotary soot blowers through the third pipes.

4. The steam soot blowing system according to claim 3, characterized in that: A drain box is also included, and the drain box is suitable for being connected to the other end of the first pipe so that the drain in the first pipe flows into the drain box.

5. The steam soot blowing system according to claim 4, characterized in that: It also includes a drain control component, which includes a first electric valve, a check valve and a first manual valve that are connected in sequence, the first electric valve is connected to the other end of the first pipe, so that the drain flowing out through the first pipe flows into the first electric valve and flows into the check valve and the first manual valve in sequence through the first electric valve, and the first manual valve is connected to the drain tank, so that the drain flowing out through the first manual valve flows into the drain tank.

6. The steam soot blowing system according to claim 4, characterized in that: It also includes a detection component, which is arranged at the other end of the first pipe and connected to the drain tank, so that the detection component detects the temperature of the drain flowing out through the first pipe, so that when the drain temperature is lower than a preset value, the second pipe and the third pipe are both disconnected from the first pipe, and the first pipe is connected to the drain tank; when the drain temperature is higher than the preset value, the second pipe and the third pipe are both connected to the first pipe, and the first pipe is connected to the drain tank.

7. The steam soot blowing system according to claim 1, characterized in that: It also includes a second manual valve, a second electric valve and a safety valve. The second manual valve, the second electric valve, the pressure reducing valve and the safety valve are connected in sequence. The second manual valve is connected to the high-temperature superheater through the air intake pipe, and the safety valve is connected to the soot blower through the air intake pipe, so that the opening and closing of the air intake pipe can be controlled by the second manual valve, the second electric valve and the safety valve.

8. The steam soot blowing system according to claim 1, characterized in that: It also includes a flow meter, which is arranged on the intake pipe and at least a part of the flow meter is connected to the intake pipe, so that the flow meter can detect the flow in the intake pipe.

9. The steam soot blowing system according to claim 1, characterized in that: The pressure of the steam flowing out after being decompressed by the pressure reducing valve is not greater than 1.8 MPa, and the steam temperature is not greater than 420°C.

10. A boiler system, characterized in that: include: boiler; An evaporator, a superheater and an economizer, wherein the evaporator, the superheater and the economizer are all arranged in the boiler; A steam soot blowing system, wherein the steam soot blowing system is the steam soot blowing system described in any one of claims 1 to 9 above, wherein the air inlet pipe of the steam soot blowing system is connected to the high-temperature superheater in the superheater, the long telescopic soot blower of the steam soot blowing system is connected to the evaporator or the superheater, and the rotary soot blower of the steam soot blowing system is connected to the economizer.

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