Roof structure of a waste heat boiler

Abstract

The utility model relates to a roof structure of waste heat boiler belongs to boiler equipment technical field, the utility model discloses a steam pocket big platform, and the roof of steam pocket big platform is set up through the stand, and the roof covers high pressure steam pocket, medium pressure steam pocket and low pressure steam pocket and the oxygen removal head of setting at the top of low pressure steam pocket, and the roof is composed of two parts of first roof and second roof with height difference, and the height difference between first roof and the oxygen removal head safety valve exhaust pipe export of setting at the top of low pressure steam pocket is 2.5 meters, and the height difference between second roof and the oxygen removal head safety valve exhaust pipe export on high pressure steam pocket and medium pressure steam pocket is 2.5 meters, and the height difference between first roof and second roof is between 3 to 4 meters, the utility model discloses the material consumption of roof steel frame and exhaust pipe is lower, and the dead weight and construction cost of roof and exhaust pipe have been reduced.

Description

Technical Field

[0001] This utility model relates to a roof structure for a waste heat boiler, belonging to the technical field of boiler equipment. Background Technology

[0002] The roof of the waste heat boiler is used to cover the steam drum platform to prevent the steam drum from being directly exposed to sun and rain. The roof of the waste heat boiler is typically made of steel and mainly consists of a steel frame of columns and a roof. Columns 2 are distributed on the steam drum platform 1, and the roof 3 is supported on the steam drum platform 1 via the columns 2 (see appendix). Figure 1 Because the low-pressure steam drum 6 of the waste heat boiler is equipped with a deaerator head 7 and a deaerator head safety valve exhaust pipe 71 at its top, according to regulations, the exhaust port of the steam drum safety valve exhaust pipe must be more than 2.5 meters above the roof and the exhaust port must extend to the outside of the roof. The deaerator head 7 at the top of the low-pressure steam drum 6 is 3 to 4 meters higher than that of the high-pressure steam drum 4 and the medium-pressure steam drum 5. Therefore, for multi-pressure steam drum waste heat boilers, because the overall height of the roof relative to the large steam drum platform is relatively high, the columns and supporting steel frames used to support the roof require a large amount of steel. At the same time, the high / medium-pressure steam drum safety valve exhaust pipes extending through the roof are also excessively long, resulting in a large self-weight of the roof and high construction costs. Summary of the Invention

[0003] This utility model mainly addresses the technical problems of existing roof structures having large self-weight, high construction costs, and excessively long exhaust pipes extending from the boiler roof. It provides a roof structure for a waste heat boiler that can reduce the length of the exhaust pipe, has a smaller self-weight, and lower construction costs.

[0004] The present invention addresses the aforementioned technical problems primarily through the following technical solution: The present invention includes a large steam drum platform, columns distributed on the large steam drum platform, and a roof erected above the large steam drum platform via the columns. The roof covers the high-pressure steam drum, the medium-pressure steam drum, and the low-pressure steam drum, as well as the deaerator head on their tops. The roof is characterized in that it includes a first roof and a second roof with a height difference. The first roof is located above the low-pressure steam drum and is at least 3 meters higher than the deaerator head. The second roof is lower than the first roof, and the height difference between the two is between 3 and 4 meters.

[0005] Preferably, the exhaust pipes of the high-pressure steam drum safety valve and the medium-pressure steam drum safety valve extend through the second roof and the exhaust ports are at least 2.5 meters above the second roof, while the exhaust pipe of the deaerator head safety valve extends through the first roof and the exhaust port is at least 2.5 meters above the first roof.

[0006] Preferably, both the first roof and the second roof include steel beams supported on columns and roof panels laid on the steel beams, with the roof panels made of profiled steel sheets.

[0007] Preferably, the system also includes supporting steel frames located on both sides of the first roof, with the upper part of the supporting steel frames connected to steel beams and the lower part connected to columns.

[0008] Preferably, the wall panels, made of profiled steel sheets, are also provided between the columns for enclosure.

[0009] This utility model has a simple structure and the following advantages: In this invention, the roof is configured as a first roof and a second roof with a height difference, forming a staggered or partially raised structure. Compared with the existing flat roof structure, this invention, while meeting the inspection needs of high / medium pressure steam drums and the specified height requirements of safety valve exhaust ports, significantly reduces the amount of materials used for the roof columns, supporting steel frames, and safety valve exhaust pipes by lowering the height of the second roof relative to the large steam drum platform. This reduces the self-weight and construction cost of the roof. Attached Figure Description

[0010] Appendix Figure 1 This is a schematic diagram of existing technology.

[0011] Appendix Figure 2 This is a schematic diagram of a preferred embodiment of the present invention.

[0012] Appendix Figure 3 It is attached Figure 2 The figure shown is a schematic diagram of a preferred embodiment of the present invention along the AA direction.

[0013] Appendix Figure 4 It is attached Figure 2 The diagram shown is a partial lateral view of a preferred embodiment of the present invention.

[0014] Explanation of reference numerals in the attached drawings: 1. Steam drum platform; 2. Column; 3. Roof; 31. First roof; 32. Second roof; 33. Supporting steel frame; 34. Wall panel; 4. High-pressure steam drum; 41. High-pressure steam drum safety valve exhaust pipe; 5. Medium-pressure steam drum; 51. Medium-pressure steam drum safety valve exhaust pipe; 6. Low-pressure steam drum; 7. Deaerator head; 71. Deaerator head safety valve exhaust pipe. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] Example 1: As shown in the attached document Figure 2 Appendix Figure 3 Appendix Figure 4 As shown, this utility model includes a large steam drum platform 1, which is mounted on the roof 3 of the large steam drum platform 1 via a column frame 2. The roof 3 covers the high-pressure steam drum 4, the medium-pressure steam drum 5, and the low-pressure steam drum 6. The columns 2 are distributed on the main platform 1 of the steam drum according to the set points in the horizontal direction ab and the vertical direction I-VI; Roof 3 includes a first roof 31 and a second roof 32 with a height difference. Both the first roof 31 and the second roof 32 include steel beams supported on the columns 2 and roof panels laid on the steel beams. The roof panels are made of profiled steel sheets. The first roof 31 protrudes from the second roof 32. The first roof 31 and the second roof 32 are closed by wall panels 34. It also includes a supporting steel frame 33 and wall panels 34. The first roof 31 is located above the low-pressure steam drum 6 and is at least 3 meters higher than the deaerator head 7; The second roof 32 is lower than the first roof 31 and the height difference between the two is between 3 and 4 meters. The supporting steel frame 33 is located on both sides of the first roof 31. The upper part of the supporting steel frame 33 is connected to the steel beam and the lower part is connected to the column 2. Wall panel 34 is made of profiled steel sheet; The exhaust pipe 41 of the high-pressure steam drum safety valve extends out of the second roof 32 and the exhaust port is at least 2.5 meters away from the second roof 32; The vent pipe 51 of the medium-pressure steam drum safety valve extends out of the second roof 32 and the vent is at least 2.5 meters away from the second roof 32; The deaerator head safety valve exhaust pipe 71 at the top of the low-pressure steam drum 6 extends out of the first roof 31 and the exhaust port is at least 2.5 meters away from the first roof 31.

[0017] Of course, the above-described drawings and embodiments are only for explaining and illustrating this utility model, and should not be construed as improperly limiting this utility model. All technical solutions obtained by those skilled in the art through equivalent adjustments and variations based on this utility model fall within the protection scope of this utility model.

Claims

1. A roof structure for a waste heat boiler, comprising a large steam drum platform (1), columns (2) distributed on the large steam drum platform (1), and a roof (3) erected above the large steam drum platform (1) via the columns (2), the roof (3) covering a high-pressure steam drum (4), a medium-pressure steam drum (5), and a low-pressure steam drum (6) and a deaerator (7) on their tops, characterized in that: The roof (3) includes a first roof (31) and a second roof (32) with a height difference. The first roof (31) is located above the low-pressure steam drum (6) and is at least 3 meters higher than the deaerator head (7). The second roof (32) is lower than the first roof (31) and the height difference between the two is between 3 and 4 meters.

2. The roof structure of a waste heat boiler according to claim 1, characterized in that: The high-pressure steam drum safety valve exhaust pipe (41) and the medium-pressure steam drum safety valve exhaust pipe (51) extend out of the second roof (32) and the exhaust port is at least 2.5 meters higher than the second roof (32). The deaerator head safety valve exhaust pipe (71) extends out of the first roof (31) and the exhaust port is at least 2.5 meters higher than the first roof (31).

3. The roof structure of a waste heat boiler according to claim 2, characterized in that: The first roof (31) and the second roof (32) both include a steel beam erected on the top of the column (2) and a roof panel laid on the steel beam, wherein the roof panel is made of profiled steel sheet.

4. The roof structure of a waste heat boiler according to claim 3, characterized in that: It also includes a supporting steel frame (33) located on both sides of the first roof (31), the upper part of the supporting steel frame (33) being connected to the steel beam and the lower part being connected to the column (2).

5. The roof structure of a waste heat boiler according to claim 1 or 2, characterized in that: It also includes wall panels (34) disposed between the columns (2) for enclosure, the wall panels (34) being made of profiled steel sheets.

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