W-flame T-type boiler with new water-cooled wall and heating surface structure

Abstract

The application discloses a W-flame T-shaped boiler with a new water-cooled wall and heating surface structure. At present, the existing W-flame boilers in China basically adopt low mass flow rate, vertical tube ring water-cooled wall, π type arrangement mode, and the burner flame has a large down-punching depth, and the lower furnace water-cooled wall is prone to local overheating due to uneven heating, and the reheater steam temperature is prone to be low. The W-flame combustion chamber (1), the spiral tube ring water-cooled wall lower furnace (2) and the vertical tube ring water-cooled wall upper furnace (3) are arranged in the application; the wall type superheater (5) and the wall type reheater (8) are arranged on the wall close to the water-cooled wall of the vertical tube ring water-cooled wall upper furnace; the outlet of the vertical tube ring water-cooled wall upper furnace is divided into two horizontal flues which are symmetrical to left and right, and then the two horizontal flues are respectively connected with two vertical tail flues. The application is used for the W-flame T-shaped boiler.

Description

Technical fields: This invention relates to a W-flame T-type boiler employing a novel water-cooled wall and heating surface structure. Background technology: W-flame is a combustion method used in boilers, primarily for burning low-volatile coals such as lean coal and anthracite. Currently, most existing W-flame boilers in China employ low mass flow rates, vertical tube coils with water-cooled walls, and a π-type arrangement. This design, due to its inherent characteristics, often suffers from the following problems: a large downward thrust of the burner flame; uneven heating of the lower furnace water-cooled walls, leading to localized overheating; and reheater steam temperatures tending to be too low. Summary of the Invention: The purpose of this invention is to solve the above-mentioned problems and provide a W-flame T-type boiler with a novel water-cooled wall and heating surface structure, which effectively eliminates the heat absorption deviation of the lower furnace water-cooled wall and prevents local overheating.

[0004] The above objectives are achieved through the following technical solutions: A W-flame T-type boiler with a novel water-cooled wall and heating surface structure, the boiler's furnace consists of a W-flame combustion chamber, a lower furnace chamber with a spiral tube water-cooled wall, and an upper furnace chamber with a vertical tube water-cooled wall. A wall-mounted superheater and a wall-mounted reheater are arranged on the furnace wall close to the water-cooled wall of the vertical tube coil. The outlet of the furnace on the vertical tube ring water-cooled wall is divided into two horizontal flues that are symmetrical to the left and right, and then connected to two vertical tail flues on the left and right respectively.

[0005] The W-flame T-type boiler, which adopts a new type of water-cooled wall and heating surface structure, has a screen-type superheater, a high-temperature superheater, and a high-temperature reheater arranged in the horizontal flue.

[0006] The W-flame T-type boiler, which adopts a new type of water-cooled wall and heating surface structure, has a low-temperature reheater and an economizer installed in its tail flue.

[0007] The W-flame T-type boiler, which adopts a new type of water-cooled wall and heating surface structure, has flue gas regulating baffles installed at the left and right tail flue outlets.

[0008] Beneficial effects: 1. The boiler of this invention adopts a "T" arrangement. The new boiler design can effectively eliminate the heat absorption deviation of the lower furnace water-cooled wall and prevent local overheating. The wall-type heating surfaces arranged in the furnace effectively reduce the problem that the boiler superheater and reheater are prone to not reaching the steam temperature due to the low flue gas temperature at the furnace outlet.

[0009] 2. The boiler “T” arrangement of the present invention effectively utilizes the space occupied by the W flame combustion chamber and reduces the overall height of the boiler, thereby reducing the manufacturing cost of the boiler. Attached image description: Appendix Figure 1 This is a schematic diagram of the structure of the present invention; In the diagram: 1. W-flame combustion chamber; 2. Lower furnace chamber of spiral tube coil water-cooled wall; 3. Upper furnace chamber of vertical tube coil water-cooled wall; 4. Intermediate transition header of water-cooled wall; 5. Wall-type superheater; 6. Screen-type superheater; 7. High-temperature superheater; 8. Wall-type reheater; 9. High-temperature reheater; 10. Low-temperature reheater; 11. Economizer; 12. Tail flue gas baffle; 13. Slag removal device; 14. W-flame burner. Detailed implementation method: Example 1: A W-flame T-type boiler with a novel water-cooled wall and heating surface structure, the furnace of which consists of a W-flame combustion chamber 1, a lower furnace chamber 2 with a spiral tube water-cooled wall, and an upper furnace chamber 3 with a vertical tube water-cooled wall. A wall-mounted superheater 5 and a wall-mounted reheater 8 are arranged on the furnace wall close to the water-cooled wall of the vertical tube coil. The outlet of the furnace on the vertical tube ring water-cooled wall is divided into two horizontal flues that are symmetrical to the left and right, and then connected to two vertical tail flues on the left and right respectively.

[0012] The W-flame boiler adopts a new water-cooled wall and heating surface structure, with a "T" arrangement. This new furnace design effectively eliminates heat absorption deviation in the lower furnace water-cooled walls, preventing localized overheating. The wall-type heating surfaces arranged in the furnace effectively reduce the problem of the boiler's superheater and reheater failing to reach the required steam temperature due to low flue gas temperature at the furnace outlet. The "T" arrangement effectively utilizes the space occupied by the W-flame combustion chamber and reduces the overall height of the boiler, thereby lowering manufacturing costs.

[0013] Example 2: According to Example 1, the W-flame T-type boiler with a novel water-cooled wall and heating surface structure is provided with a screen-type superheater 6, a high-temperature superheater 7, and a high-temperature reheater 9 arranged in the horizontal flue.

[0014] Example 3: According to Embodiment 1 or 2, the W-flame T-type boiler with a novel water-cooled wall and heating surface structure is equipped with a low-temperature reheater 10 and an economizer 11 in the tail flue.

[0015] Example 4: According to Example 3, the W-flame T-type boiler with a novel water-cooled wall and heating surface structure is equipped with flue gas regulating baffles 12 at the left and right tail flue outlets.

Claims

1. A W-flame T-type boiler employing a novel water-cooled wall and heating surface structure, characterized in that: The boiler's furnace consists of a W-flame combustion chamber, a lower furnace chamber with spiral tube coils and water-cooled walls, and an upper furnace chamber with vertical tube coils and water-cooled walls. A wall-mounted superheater and a wall-mounted reheater are arranged on the furnace wall close to the water-cooled wall of the vertical tube coil. The outlet of the furnace on the vertical tube ring water-cooled wall is divided into two horizontal flues that are symmetrical to the left and right, and then connected to two vertical tail flues on the left and right respectively.

2. The W-flame T-type boiler with a novel water-cooled wall and heating surface structure as described in claim 1, characterized in that: The horizontal flue is equipped with a screen-type superheater, a high-temperature superheater, and a high-temperature reheater.

3. The W-flame T-type boiler with a novel water-cooled wall and heating surface structure as described in claim 2, characterized in that: The tail flue is equipped with a low-temperature reheater and an economizer.

4. The W-flame T-type boiler with a novel water-cooled wall and heating surface structure as described in claim 3, characterized in that: The two tail flue outlets on the left and right are each equipped with a flue gas regulating baffle.

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