Pipe avoiding structure of water cooling wall at tail part of horizontal garbage waste heat furnace

Abstract

The utility model relates to the technical field of waste heat boilers, in particular to a pipe yielding structure of a tail water cooling wall of a horizontal waste heat boiler, which has no limitation on the height requirement of the tail water cooling wall, does not influence other equipment, saves boiler space and raw materials, is convenient to install on site, improves economical efficiency, and reduces cost. The tail water-cooled wall side lower header comprises a tail water-cooled wall side lower header and water-cooled wall pipes, and is characterized in that a small header is arranged above the tail water-cooled wall side lower header, the two ends of the small header are connected through connecting pipes, and the small header and the connecting pipes at the two ends define an interference object receding area; and the water cooling wall pipe above the interference object abdicating area is connected with the small collecting box.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, in particular to a pipe-leaving structure of a water-cooled wall at the rear of a horizontal garbage waste heat boiler. Background Art

[0002] At present, the traditional pipe-making form of the water-cooled wall at the tail of the horizontal garbage furnace is generally: the water-cooled wall pipe 2 avoids the interfering object 1 in a curved manner, and the number of water-cooled wall pipes to be bent and the height of the bending section are determined according to the size of the interfering object 1. When the diameter of the interfering object 1 is large, 4 to 6 or more pipes are generally required. This structure has the following disadvantages:

[0003] 1. In order to ensure the manufacturing process and meet relevant specifications, the bent water-cooled wall tube 2 needs to meet a certain height H, which results in the tail side lower water-cooled wall header 4 being moved down to make room for the bent tube H, increasing the height of the tail heating surface, resulting in a waste of space and raw materials, and very poor economic efficiency;

[0004] 2. For the tail water-cooled wall whose height cannot be increased structurally, in order to ensure the height of the elbow, the distance H1 between other equipment 3 and the interference object will be increased, sacrificing the optimal configuration space of other equipment 3 (such as soot blower), affecting its operation effect;

[0005] 3. The water-cooled wall tubes 2 that need to be bent are generally space bends, which require relatively high manufacturing precision. If the workshop is not careful, a slight manufacturing error will cause interference between the water-cooled wall bends 2 during installation, or the finished width L of the bends will exceed the sealing box 5, causing difficulties in on-site installation. Summary of the invention

[0006] In order to solve the above technical problems, the utility model provides a pipe-letting structure for the tail water-cooled wall of a horizontal garbage waste heat boiler. There is no restriction on the height requirement of the tail water-cooled wall and it will not affect other equipment. It saves boiler space and raw materials, is easy to install on site, and improves economy.

[0007] The technical solution is as follows: a pipe-yielding structure for the tail water-cooled wall of a horizontal waste heat boiler, which includes a lower header on the tail water-cooled wall side and water-cooled wall tubes, and is characterized in that a small header is arranged above the lower header on the tail water-cooled wall side and the two ends are connected by connecting pipes respectively, the small header and the connecting pipes at the two ends form an interference object-yielding area, and the water-cooled wall tubes above the interference object-yielding area are connected to the small header.

[0008] After adopting the utility model, there is no need to bend the water-cooled wall tubes to make way for interference, which reduces manufacturing precision and facilitates on-site installation. The height of the rear water-cooled wall is no longer increased for no reason due to the need to ensure the height of the bent tubes, thus saving boiler space and steel consumption of raw materials. It is also unnecessary to affect the optimal configuration space of other equipment in order to ensure the space for the bent tubes, thereby improving the overall performance of the boiler and effectively improving the economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the prior art structure;

[0010] Figure 2 It is a schematic diagram of the AA section structure;

[0011] Figure 3 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0012] See Figure 3 As shown, a pipe-yielding structure of the tail water-cooled wall of a horizontal waste heat boiler comprises a lower header 4 on the tail water-cooled wall side and water-cooled wall tubes 2, an interference object 1 is located above the lower header 4 on the tail water-cooled wall side, and other equipment 3 is at a higher place, a small header 5 is arranged above the lower header 4 on the tail water-cooled wall side (and the height exceeds the interference object 1), and the two ends are connected by connecting pipes 6 respectively, the small header 5 and the connecting pipes 6 at both ends form an interference object yielding area, and the space here is just enough for the interference object 1 to pass through, the water-cooled wall tubes 2 above the interference object yielding area are connected to the small header 5, and the rest are still connected to the lower header 4 on the tail water-cooled wall side.

[0013] The flow cross section of a single connecting pipe 6 is generally larger than the flow interface of a single water wall pipe 2, so the number of connecting pipes can be less, and the interference object 1 can be directly avoided. The diameter of the small header 5 and the number and diameter of the connecting pipes 6 can be calculated and determined according to the "Calculation Method of Hydrodynamics of Power Plant Boilers".

[0014] The advantages of the new pipe-handling method in this application are as follows:

[0015] The height of the rear water-cooled wall is no longer increased unnecessarily due to the need to ensure the height of the elbow, which saves boiler space and steel consumption of raw materials; and there is no need to affect the optimal configuration space of other equipment 3 in order to ensure the elbow space, thereby improving the overall performance of the boiler; the on-site installation of the structure is more convenient and simple, and a series of problems caused by the spatial elbow structure characteristics will no longer occur.

[0016] Moreover, since the flow cross-section of the small manifold 5, the flow interface and the number of connecting pipes 6 can be adjusted according to the size of the interference object 1, as long as it meets the hydrodynamic calculation standards and on-site operation requirements, the size of the interference object 1 is no longer subject to excessive restrictions and has greater design freedom.

Claims

1. A pipe-leaving structure for the tail water-cooled wall of a horizontal waste heat boiler, comprising a lower header on the tail water-cooled wall side and water-cooled wall pipes, characterized in that: A small header is arranged above the lower header on the tail water-cooled wall side and the two ends are connected by connecting pipes respectively. The small header and the connecting pipes at the two ends form an interference clearance area, and the water-cooled wall pipes above the interference clearance area are connected to the small header.

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