Front burner system suitable for high-pressure boiler
By introducing a pre-burner system into a high-pressure boiler, using the hood to mix and combustion to generate high-temperature flue gas, the safety and stability problems of low-load operation of the boiler are solved, and the generation of low-pressure steam and the safe and stable operation of the boiler are achieved.
Patent Information
- Application Number
- CN202421788186.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-26
AI Technical Summary
When the boiler is running at low load, it is difficult for the existing technology to ensure safe and stable operation. Conventional adjustment methods may lead to a decrease in combustion efficiency or the boiler is shut down, posing safety hazards.
Design a pre-burner system suitable for high-pressure boilers, including a pre-burner furnace, air cloth plate and connecting flue. It enters primary air, steam or flue gas through the air hood for mixing and combustion, generating high-temperature flue gas into the high-pressure boiler, producing low-pressure steam to ensure the stable operation of the boiler.
When the high-pressure boiler is not put into operation, low-pressure steam is generated through the pre-burner system to ensure the safe and stable operation of the high-pressure boiler under low loads, avoiding the instability of traditional methods and the risk of shutdown.
Smart Images
Figure CN223063830U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of burners, in particular to a pre-burner system applicable to high-pressure boilers. Background Art
[0002] During the operation of a boiler, due to reasons such as production requirements and the designed capacity of the boiler, the load is often lower than the rated load. At this time, operating at a low load can better meet production requirements, reduce energy waste, and ensure the safe and stable operation of the equipment.
[0003] To solve this problem, conventional methods include adjusting the water supply, reducing the flue gas temperature, and adjusting the oxygen supply of the burner. However, these methods must ensure that the water level in the boiler is not lower than the safe water level, and reducing the flue gas temperature and adjusting the oxygen supply of the burner may cause the boiler to be unable to operate safely and stably, affecting the combustion efficiency and even causing an emergency shutdown of the boiler. Content of the Utility Model
[0004] To solve the above technical problems, the utility model designs a pre-burner system applicable to high-pressure boilers.
[0005] The utility model adopts the following technical solutions:
[0006] A pre-burner system applicable to high-pressure boilers includes a pre-burner furnace, a pre-burner air distribution plate, and a connecting flue. The lower part of the pre-burner furnace is the pre-burner air distribution plate. The upper part of the rear wall of the pre-burner furnace is connected to the connecting flue, and the other end of the connecting flue is the high-pressure boiler furnace. Steam or flue gas inlets and primary air inlets are uniformly arranged correspondingly under the pre-burner air distribution plate, and air caps are arranged correspondingly on the pre-burner air distribution plate for the steam or flue gas inlets and the primary air inlets respectively.
[0007] Preferably, the steam or flue gas inlets and the primary air inlets are staggered and uniformly distributed in two upper and lower rows.
[0008] Preferably, steam air caps or flue gas air caps are arranged on the pre-burner air distribution plate corresponding to the steam or flue gas inlets, and primary air caps are arranged corresponding to the secondary air inlets.
[0009] Preferably, the pre-burner air distribution plate is inclined.
[0010] Preferably, measuring holes, viewing holes, and manholes are provided on the pre-burner furnace.
[0011] Preferably, the air caps adopt bell-shaped heat-resistant cast steel air caps.
[0012] Preferably, the air caps are connected to the primary air box through metal hoses via the primary air inlets.
[0013] The beneficial effects of the present utility model are as follows: In the present utility model, primary air, steam or flue gas enters the furnace of the pre - combustion burner through the air cap, mixes with fuel for combustion, and the generated high - temperature flue gas enters the high - pressure boiler through the connecting flue. Compared with traditional high - pressure boilers, the present utility model adopts a pre - combustion burner system. Without putting the high - pressure boiler into operation, the hot flue gas generated by the pre - combustion burner system enters the original boiler, which can generate low - pressure steam and ensure the safe and stable operation of the high - pressure boiler at low load. Brief Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] In the figure: 1. Furnace of the pre - combustion burner, 2. Air distribution plate of the pre - combustion burner, 3. Connecting flue, 4. Air cap, 5. High - pressure boiler, 6. Steam or flue gas inlet, 7. Primary air inlet. Specific Embodiments
[0016] The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the drawings:
[0017] Embodiment: As Figure 1 shown, a pre - combustion burner system applicable to a high - pressure boiler includes a furnace of the pre - combustion burner, an air distribution plate of the pre - combustion burner, and a connecting flue. The lower part of the furnace of the pre - combustion burner is the air distribution plate of the pre - combustion burner. The upper part of the rear wall of the furnace of the pre - combustion burner is connected to the connecting flue, and the other end of the connecting flue is the furnace of the high - pressure boiler. The furnace of the pre - combustion burner is provided with various measurement holes, viewing holes, manholes, etc., to ensure convenient maintenance and cleaning. The steam or flue gas inlet and the primary air inlet are correspondingly and evenly arranged below the air distribution plate of the pre - combustion burner, and air caps are respectively arranged on the air distribution plate of the pre - combustion burner corresponding to the steam or flue gas inlet and the primary air inlet. Part of the air caps are steam air caps or flue gas air caps, and the other part are primary air caps. The air caps adopt bell - shaped heat - resistant cast steel air caps. The air caps are vulnerable parts, and the air caps should be checked every time the boiler is shut down. Those found to be severely worn should be replaced in time. The air caps are connected to the primary air box through metal hoses to solve the expansion problem between the two. The air distribution plate of the pre - combustion burner should have sufficient strength and stiffness to support its own weight and the weight of the bed material. The selection of the materials for the air distribution plate of the pre - combustion burner and the air caps can ensure that the air distribution plate is not thermally deformed and the air caps are not burned during fire suppression.
[0018] The working principle of the present utility model is: Primary air, steam or flue gas enters the furnace of the pre - combustion burner through the air cap, mixes with fuel for combustion, and the generated high - temperature flue gas enters the high - pressure boiler through the connecting flue.
[0019] Compared with traditional high-pressure boilers, the utility model adopts a pre-combustion burner system. Without operating the high-pressure boiler, the hot flue gas generated by the pre-combustion burner system enters the original boiler, which can generate low-pressure steam to ensure the safe and stable operation of the high-pressure boiler at low load.
[0020] The above-described embodiments are only a preferred solution of the utility model and do not impose any form of limitation on the utility model. There are other variations and modifications without exceeding the technical solutions described in the claims.
Claims
1. A pre - combustion burner system applicable to high - pressure boilers, characterized in that, It includes a pre - combustion chamber furnace, a pre - combustion chamber air distribution plate, and a connecting flue. The pre - combustion chamber air distribution plate is located below the pre - combustion chamber furnace. The upper part of the rear wall of the pre - combustion chamber furnace is connected to the connecting flue, and the other end of the connecting flue is the high - pressure boiler furnace. Steam or flue gas inlets and primary air inlets are uniformly arranged correspondingly and evenly below the pre - combustion chamber air distribution plate. Wind caps are respectively arranged on the pre - combustion chamber air distribution plate corresponding to the steam or flue gas inlets and the primary air inlets.
2. The pre - combustion burner system applicable to a high - pressure boiler according to claim 1, wherein, The steam or flue gas inlets and the primary air inlets are staggered and evenly distributed in two upper and lower rows.
3. The pre - combustion burner system applicable to a high - pressure boiler according to claim 1, characterized in that, Steam wind caps or flue gas wind caps are arranged on the pre - combustion chamber air distribution plate corresponding to the part of the steam or flue gas inlets, and primary air wind caps are arranged corresponding to the part of the secondary air inlets.
4. The pre - combustion burner system applicable to a high - pressure boiler according to claim 1, characterized in that, The pre - combustion chamber air distribution plate is inclined.
5. The pre-combustion burner system applicable to a high-pressure boiler according to claim 1, characterized in that, Measurement holes, sight holes, and manholes are provided on the pre - combustion chamber furnace.
6. The pre - combustion burner system applicable to a high - pressure boiler according to claim 1, wherein, The wind caps adopt bell - shaped heat - resistant cast steel wind caps.
7. A pre - combustion burner system applicable to a high - pressure boiler according to claim 1, characterized in that, The wind caps are connected to the primary air box through metal hoses via the primary air inlets.