Novel gas pulse soot blower sealing air system
By designing a sealed air system for heater and soot blowing components, the low-temperature corrosion problem caused by uneven sealed air volume is solved, ensuring the normal operation of the gas pulse soot blower and the stability of the equipment.
Patent Information
- Application Number
- CN202422120303.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the sealed air system of traditional gas pulse soot blower, uneven distribution of sealed air volume causes flue gas to enter the soot blower pipeline in the cross-train, causing low-temperature corrosion and affecting the normal use of the equipment.
Design a sealed air system including an air compressor, an air heater and multiple soot blowing components to ensure that the flue gas temperature is always higher than the dew point, and the air volume is adjusted in combination with an orifice flowmeter and butterfly valve to avoid low-temperature corrosion.
It realizes uniform distribution of sealed air volume, prevents flue gas from entering the soot blower in the cross-trend, avoids low-temperature corrosion, and improves the stability and service life of the equipment.
Smart Images
Figure CN223090677U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas pulse soot blowers, and particularly relates to a novel sealing air system for a gas pulse soot blower. Background Art
[0002] The gas pulse soot blower is one of the main soot cleaning devices for waste heat boilers. The gas pulse soot blowing technology mixes combustible gases (such as acetylene, natural gas, liquefied gas, etc.) and air (or oxygen) in an appropriate proportion, and after deflagration, a pulse of a certain intensity is generated, which acts on the surface of the accumulated ash, thereby knocking down the accumulated ash or scale.
[0003] The pressure on the flue gas side of the waste heat boiler is slightly positive, and there are corrosive gases such as sulfur dioxide in the flue gas. A set of sealing air system is arranged for the gas pulse soot blower. Compressed air with a pressure higher than the flue gas side pressure is used to blow air into the interior of the waste heat boiler through the nozzles of the gas pulse soot blower, preventing the flue gas from flowing back into the pipeline of the gas pulse soot blower and causing low-temperature corrosion to the valve pipeline of the soot blower.
[0004] However, the traditional sealing air system of the gas pulse soot blower has the following problems: The sealing air pipeline adopts a single main pipe form, and multiple branch pipes are led from the main pipe to each gas pulse soot blower respectively. Due to the different lengths of the sealing air pipelines and the fact that the flue gas pressure in the furnace gradually decreases along the flue gas flow direction, the flue gas side pressures at the positions of each layer of gas pulse soot blowers are also inconsistent. The above factors result in uneven air volume distribution of the sealing air at each gas pulse soot blower. At the gas pulse soot blower with a small sealing air volume, the flue gas is likely to flow back into the pipeline of the gas pulse soot blower, causing low-temperature corrosion to the valve pipeline of the soot blower, and the flue gas leaks out of the furnace from the corrosion point, affecting the normal use of the soot blower and the boiler equipment. Summary of the Utility Model
[0005] Aiming at the defects in the prior art, the purpose of the utility model is to provide a novel sealing air system for a gas pulse soot blower, which can avoid causing low-temperature corrosion to the valve pipeline of the gas pulse soot blower.
[0006] To achieve the above purpose, the utility model is realized by the following technical solutions: A novel sealing air system for a gas pulse soot blower includes an air compressor, an air heater, and multiple soot blowing components. The air heater is arranged in the smoke outlet of the waste heat boiler. The air inlet of the air heater is communicated with the air outlet of the air compressor, and the air outlet of the air heater is communicated with multiple soot blowing components.
[0007] Further, the soot blowing component includes a main pipe and multiple branch pipes. The main pipe is communicated with the air outlet of the air heater. The multiple branch pipes are arranged at intervals. The first end of the branch pipe is communicated with the main pipe, and a gas pulse soot blower is installed at the second end of the branch pipe.
[0008] Further, an orifice flowmeter and a butterfly valve are installed on the branch pipe.
[0009] Further, the number of the soot blowing assemblies is two.
[0010] Further, heat preservation layers are sleeved on the outer walls of the main pipe and the branch pipes.
[0011] Advantages of the present utility model: A novel sealed air system for a gas pulse soot blower provided by the present utility model heats compressed air to a temperature 30°C higher than the flue gas dew point corrosion temperature through designing an air heater, so that the flue gas temperature entering the soot blowing assembly is always higher than the dew point corrosion temperature. Under this condition, even if the flue gas backflows into the gas pulse soot blower of the soot blowing assembly, it will not cause low-temperature corrosion to the valve pipeline of the gas pulse soot blower. Description of the Drawings
[0012] Figure 1 It is a schematic structural diagram of the present utility model.
[0013] Reference numerals: 10 - air compressor, 20 - air heater, 30 - soot blowing assembly, 31 - main pipe, 32 - branch pipe, 33 - gas pulse soot blower, 34 - orifice flowmeter, 35 - butterfly valve. Detailed Embodiments
[0014] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0015] In this application, unless otherwise clearly defined and limited, the terms "connection" and "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0016] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "vertical", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.
[0017] In addition, terms such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.
[0018] As Figure 1 shown, the present utility model provides a novel sealed air system for a gas pulse soot blower, which includes an air compressor, an air heater, and a plurality of soot blowing components. The air heater is arranged in the flue gas outlet of the waste heat boiler. The air inlet of the air heater is communicated with the air outlet of the air compressor, and the air outlet of the air heater is communicated with a plurality of soot blowing components.
[0019] By designing the air heater, the present utility model heats the compressed air to 30°C higher than the flue gas dew point corrosion temperature, so that the flue gas temperature entering the soot blowing components is always higher than the dew point corrosion temperature. Under this condition, even if the flue gas backflows into the soot blowing components, it will not cause low-temperature corrosion to the soot blowing components.
[0020] Meanwhile, a plurality of soot blowing components divide the waste heat boiler into a plurality of regions according to the arrangement positions. The compressed air blown out by the air compressor enters different soot blowing components after being heated by the air heater. Each soot blowing component is responsible for providing the sealed air for one region alone, so that the distribution of the sealed air volume in each region of the waste heat boiler is uniform, and the stability of the system is improved.
[0021] In one embodiment, the soot blowing component includes a main pipe and a plurality of branch pipes. The main pipe is communicated with the air outlet of the air heater. The plurality of branch pipes are arranged at intervals. The first end of the branch pipe is communicated with the main pipe, and a gas pulse soot blower is installed at the second end of the branch pipe.
[0022] The compressed air blown out by the air compressor enters the internal gas pulse soot blowers of different soot blowing components after being heated by the air heater, so that it will not cause low-temperature corrosion to the valve pipelines of the gas pulse soot blowers.
[0023] In one embodiment, an orifice flowmeter and a butterfly valve are installed on the branch pipe. The sealed air flow rate in each branch pipe can be measured by the orifice flowmeter, and the sealed air flow rate in each branch pipe can be adjusted by adjusting the opening of the butterfly valve, so that the sealed air flow rate in each branch pipe is relatively uniform, further avoiding the backflow of flue gas into the gas pulse soot blower.
[0024] In one embodiment, the number of the soot blowing components is two.
[0025] In one embodiment, heat insulation layers are sleeved on the outer walls of the main pipe and the branch pipes to reduce the heat dissipation loss of the main pipe and the branch pipes.
[0026] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present utility model.
[0027] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A novel sealing air system for a gas pulse soot blower, comprising an air compressor, an air heater, and a plurality of soot blowing components, characterized in that: The air heater is arranged in the flue gas outlet of the waste heat boiler. The air inlet of the air heater is communicated with the air outlet of the air compressor, and the air outlet of the air heater is communicated with a plurality of the soot blowing assemblies.
2. The novel sealed air system of the gas pulse soot blower according to claim 1, characterized in that: The soot blowing assembly includes a main pipe and a plurality of branch pipes. The main pipe is communicated with the air outlet of the air heater. The plurality of branch pipes are arranged at intervals. The first end of the branch pipe is communicated with the main pipe, and a gas pulse soot blower is installed at the second end of the branch pipe.
3. A novel sealed air system for a gas pulse soot blower according to claim 2, characterized in that: An orifice flowmeter and a butterfly valve are installed on the branch pipe.
4. A novel sealing air system for a gas pulse soot blower according to claim 1, characterized in that: The number of the soot blowing assemblies is two.
5. A novel sealed air system for a gas pulse soot blower according to claim 2, characterized in that: Heat preservation layers are sleeved on the outer walls of the main pipe and the branch pipes.