Steam soot blowing system for secondary high-parameter waste incineration boiler

Abstract

The utility model relates to the technical field of soot blowing systems, and provides a steam soot blowing system for a secondary high-parameter waste incineration boiler, which is used for performing steam soot blowing on a heating surface of a high-temperature superheater, a heating surface of a medium-temperature superheater and a heating surface of a low-temperature superheater, and comprises a plurality of steam soot blowers, the multiple steam soot blowers are arranged on the side edges of the high-temperature superheater, the middle-temperature superheater and the low-temperature superheater correspondingly. The first end of the pipeline is communicated with an outlet header of the medium-temperature superheater, and the second end of the pipeline is communicated with the multiple steam soot blowers. According to the steam soot blowing system for the secondary high-parameter waste incineration boiler, steam in the outlet collecting box of the medium-temperature superheater serves as a soot blowing air source, waste of high-parameter steam and loss of equipment can be reduced, and meanwhile the safety of the equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of soot blowing systems, in particular to a steam soot blowing system for a secondary high parameter garbage incineration boiler. Background Art

[0002] Incineration of domestic waste is the main method of waste treatment in my country. It can not only achieve the "reduction, resource utilization and harmlessness" of waste, but also use the heat generated by waste incineration to generate electricity, realizing the recycling and utilization of waste as a renewable resource. However, the composition of domestic waste is complex and the ash content is high, which makes it easy for the heating surface of the waste incineration boiler to accumulate ash and slag, reducing its heat transfer performance and service life. Steam soot blowing is a traditional soot blowing method. It uses steam at a certain pressure and temperature to directly blow the heating surface of the incineration boiler. It has a good effect on removing ash and slag on the heating surface. Therefore, steam soot blowing is also a commonly used soot cleaning method in waste incineration boilers.

[0003] In the commonly used steam sootblowing technology, the steam source pressure requirement is 1.8-2.7MPa, and the operating temperature requirement is 340-370℃. The main steam parameter of the conventional medium-temperature and medium-pressure waste incineration boiler is 4.0MPa / 400℃, and the steam source of the steam sootblower is usually taken from the outlet header of its high-temperature superheater (steam parameter is 4.0MPa / 400℃).

[0004] The main steam parameter of the second highest parameter waste incineration boiler is 6.4MPa / 485℃. If the steam at the outlet header of its high-temperature superheater is still selected as the steam source of the steam soot blower (steam parameter is 6.4MPa / 485℃), a special desuperheater device needs to be installed. This will not only cause waste of high-parameter steam, but also require upgrading the material of the pipeline. At the same time, high-parameter steam is easy to carry water after desuperheating, which will bring risks to the equipment. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a steam soot blowing system for a secondary high parameter waste incineration boiler, which can reduce the waste of high parameter steam and the loss of equipment while ensuring the safety of the equipment.

[0006] In order to achieve the above object, the utility model is implemented by the following technical scheme: a steam soot blowing system for a secondary high parameter waste incineration boiler, used for steam soot blowing the heating surface of a high temperature superheater, the heating surface of a medium temperature superheater and the heating surface of a low temperature superheater, comprising:

[0007] A plurality of steam soot blowers, wherein the plurality of steam soot blowers are respectively arranged on the sides of the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater;

[0008] A pipeline, a first end of which is communicated with the outlet header of the medium-temperature superheater, and a second end of which is communicated with the plurality of steam sootblowers.

[0009] Furthermore, a pneumatic regulating valve, a pressure transmitter and a pressure controller are installed on the pipeline, and the pneumatic regulating valve, the pressure transmitter and the pressure controller are all electrically connected to the PLC controller.

[0010] Furthermore, a safety valve is installed on the pipeline.

[0011] Furthermore, a pressure gauge is installed on the pipeline.

[0012] Furthermore, an electric stop valve is installed on the pipeline.

[0013] Furthermore, a manual stop valve is installed on the pipeline.

[0014] Beneficial effects of the utility model: The utility model provides a steam sootblowing system for a sub-high parameter waste incineration boiler, which uses the steam in the outlet header of the medium-temperature superheater as the sootblowing gas source. Compared with the sootblowing steam source of a conventional waste incineration boiler that is drawn from the outlet header of the high-temperature superheater, on the one hand, there is no need to set up a special desuperheater device, thereby reducing equipment investment; on the other hand, using a steam source with a lower steam parameter reduces the waste of high-parameter steam and the loss of equipment, and also reduces the risk of high-parameter steam carrying water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure numerals: 1- outlet header of medium-temperature superheater, 2- pipeline, 3- manual stop valve, 4- electric stop valve, 5- pneumatic regulating valve, 6- PLC controller, 7- safety valve, 8- pressure transmitter, 9- pressure gauge, 10- pressure controller, 11- high-temperature superheater, 12- medium-temperature superheater, 13- low-temperature superheater, 14- steam soot blower. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0019] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" etc. indicating orientations or positional relationships are 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 device or element referred to 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.

[0020] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0021] like Figure 1 As shown, the utility model provides a steam sootblowing system for a sub-high parameter waste incineration boiler, which is used to steam sootblow the heating surfaces of the high-temperature superheater 11, the medium-temperature superheater 12 and the low-temperature superheater 13 inside the sub-high parameter waste incineration boiler, and includes a steam sootblower 14 and a pipeline 2.

[0022] There are multiple steam soot blowers 14 , which are respectively arranged on the sides of the high-temperature superheater 11 , the medium-temperature superheater 12 and the low-temperature superheater 13 .

[0023] The first end of the pipeline 2 is connected to the outlet header 1 of the medium temperature superheater (steam parameter is 6.8MPa / 404℃), and the second end of the pipeline 2 is connected to multiple steam soot blowers 14. Preferably, a pipe joint is provided on the outlet header 1 of the medium temperature superheater to facilitate the connection of the pipeline 2.

[0024] This system draws out the steam in the outlet header 1 of the medium-temperature superheater through the pipeline 2, and blows it out through multiple steam soot blowers 14, thereby performing steam soot blowing on the heating surfaces of the high-temperature superheater 11, the medium-temperature superheater 12 and the low-temperature superheater 13.

[0025] This system uses the steam in the outlet header 1 of the medium-temperature superheater as the sootblowing gas source. Compared with the conventional waste incineration boiler in which the sootblowing steam source is drawn from the outlet header of the high-temperature superheater 11, on the one hand, there is no need to set up a special desuperheater device, reducing equipment investment; on the other hand, the use of a steam source with lower steam parameters reduces the waste of high-parameter steam and equipment loss, and also reduces the risk of high-parameter steam carrying water.

[0026] In one embodiment, a pneumatic regulating valve 5 , a pressure transmitter 8 and a pressure controller 10 are installed on the pipeline 2 , and the pneumatic regulating valve 5 , the pressure transmitter 8 and the pressure controller 10 are all electrically connected to the PLC controller 6 .

[0027] After the steam in the outlet header 1 of the medium-temperature superheater enters the pipeline 2, it is further adjusted to the steam temperature and pressure suitable for soot blowing through the pneumatic regulating valve 5, PLC controller 6, pressure transmitter 8 and pressure controller 10.

[0028] In one embodiment, a safety valve 7 is also installed on the pipeline 2 to improve the safety of the system during operation.

[0029] In one embodiment, a pressure gauge 9 is also installed on the pipeline 2 to facilitate the staff to quickly grasp the pressure value of the steam in the pipeline 2.

[0030] In one embodiment, an electric stop valve 4 is also installed on the pipeline 2 to facilitate the staff to control the opening and closing of the pipeline 2 through the PLC controller 6, thereby controlling the operation of the system.

[0031] In one embodiment, a manual stop valve 3 is also installed on the pipeline 2, and the manual stop valve 3 with a mechanical structure is retained to further improve the safety of the system during operation.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steam soot blowing system for a secondary high parameter waste incineration boiler, used for steam soot blowing on the heating surface of a high temperature superheater, the heating surface of a medium temperature superheater and the heating surface of a low temperature superheater, characterized in that: include: A plurality of steam soot blowers, wherein the plurality of steam soot blowers are respectively arranged on the sides of the high-temperature superheater, the medium-temperature superheater and the low-temperature superheater; A pipeline, a first end of which is communicated with the outlet header of the medium-temperature superheater, and a second end of which is communicated with the plurality of steam sootblowers.

2. A steam soot blowing system for a waste incineration boiler with a sub-high parameter according to claim 1, characterized in that: A pneumatic regulating valve, a pressure transmitter and a pressure controller are installed on the pipeline, and the pneumatic regulating valve, the pressure transmitter and the pressure controller are all electrically connected to the PLC controller.

3. A steam soot blowing system for a waste incineration boiler with a sub-high parameter according to claim 2, characterized in that: A safety valve is also installed on the pipeline.

4. A steam soot blowing system for a waste incineration boiler with a sub-high parameter according to claim 2, characterized in that: A pressure gauge is also installed on the pipeline.

5. The steam soot blowing system for a waste incineration boiler with a sub-high parameter according to claim 2, characterized in that: An electric stop valve is also installed on the pipeline.

6. The steam soot blowing system for a waste incineration boiler with a sub-high parameter according to claim 2, characterized in that: A manual stop valve is also installed on the pipeline.

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