Flow equalizing suspension device of waste heat boiler

Abstract

The utility model discloses a waste heat boiler flow equalizing suspension device which comprises a front water-cooled wall, a downcomer, a water-cooled flow guide screen lower header, a water-cooled flow guide screen, a water-cooled flow guide screen upper header, a slag solidification pipe, a rear water-cooled wall, a heating surface, a suspension pipe, a steam guide pipe and a steam pocket. And the downcomer is used for introducing saturated water and / or unsaturated water into the water-cooling flow guide screen lower header from the steam pocket, then sequentially entering the water-cooling flow guide screen, the water-cooling flow guide screen upper header, the slag solidification pipe, the suspension pipe and the steam guide pipe, and finally returning to the steam pocket. The flow equalizing suspension device of the waste heat boiler has good economic practicability, the water cooling flow guide screen, the slag solidification pipe and the suspension pipe share the downcomer, and the arrangement number of the downcomer and the steam guide pipe is reduced; meanwhile, the slag solidification pipe and the suspension pipe are led out from the water-cooling flow guide screen upper collecting box, and the sealing problem of the through-wall pipe is solved; and the front section of the suspension pipe is bent into a slag solidification pipe heating surface before the action of the suspension pipe is formed, so that the effects of cooling and reducing the coking of the superheater and the reheater can be achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of boilers, and in particular relates to a flow-balancing suspension device for a waste heat boiler. Background Art

[0002] In large waste heat boilers, especially when the inlet flue gas temperature is as high as 800℃ or above, guide plates are often installed in the boiler to prevent the flue gas from flowing sideways, so as to achieve the effect of equal flow. At the same time, large waste heat boilers often use high parameters (high temperature and high pressure, even ultra-high temperature and ultra-high pressure), so the superheater and reheater need to arrange the heating surface in the high temperature area to enhance heat transfer, and the support of the heating surface in the high flue gas temperature area mostly adopts a water-cooled suspension pipe structure; and the lower header of the water-cooled suspension pipe is mostly arranged outside the furnace, and the water-cooled suspension pipe passes through the water-cooled wall in the high flue gas temperature area to suspend and support the heating surface in the high flue gas temperature area. The sealing of the water-cooled suspension pipe through the wall is a difficult problem, and the pitch of the wall through the water-cooled suspension pipe is limited by the water-cooled wall. Utility Model Content

[0003] The present application provides a flow equalization suspension device for a waste heat boiler, which is used to solve the technical problem of flow equalization suspension in a high smoke temperature zone at an inlet of a waste heat boiler.

[0004] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0005] The embodiment of the present application provides a flow-balanced suspension device for a waste heat boiler, comprising: a front water-cooled wall, a downcomer, a water-cooled guide screen lower header, a water-cooled guide screen, a water-cooled guide screen upper header, a slag condensation pipe, a rear water-cooled wall, a heating surface, a suspension pipe, a steam guide pipe and a steam drum;

[0006] The downcomer is used to introduce saturated water and / or unsaturated water from the steam drum into the lower header of the water-cooled guide screen, and then enter the water-cooled guide screen, the upper header of the water-cooled guide screen, the slag condensation pipe, the suspension pipe, the steam guide pipe, and finally return to the steam drum.

[0007] In some embodiments, hanger pipes are used to support the heated surface.

[0008] In some embodiments, there are multiple heating surfaces, and the multiple heating surfaces are arranged at intervals along the axial direction of the suspension pipe.

[0009] In some embodiments, a water-cooled guide screen is installed at the inlet of the waste heat boiler to play a role in flow equalization in the turning flue of the waste heat boiler, so that the high-temperature flue gas flows evenly through the heating surface.

[0010] In some embodiments, the water-cooled guide screen lower header is installed on the center line of the waste heat boiler inlet.

[0011] In some embodiments, the water-cooled guide screen adopts a full water-cooling structure suitable for high smoke temperature areas.

[0012] In some embodiments, the suspension pipe and the slag coagulation pipe are integrally formed, the suspension pipe is a straight pipe section, and the slag coagulation pipe is a curved section.

[0013] In some embodiments, the two suspension pipes are symmetrically arranged, and the two slag coagulation pipes are symmetrically arranged.

[0014] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0015] A waste heat boiler flow equalization suspension device provided in an embodiment of the present application has good economic practicality. The water-cooled guide screen, the slag condensing pipe and the suspension pipe share a downcomer, thereby reducing the number of downcomers and steam guide pipes. At the same time, the slag condensing pipe and the suspension pipe are led out from the upper header of the water-cooled guide screen, thereby reducing the sealing problem at the wall-penetrating pipe. Moreover, before the suspension pipe is formed, the front section of the suspension pipe is bent into the heating surface of the slag condensing pipe, which can play a role in cooling and reducing the coking of the superheater and the reheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A structural schematic diagram of a waste heat boiler flow equalizing suspension device provided in an embodiment of the present application is shown.

[0018] Illustration Description:

[0019] 1. Front water-cooled wall; 2. Downcomer; 3. Lower header of water-cooled guide screen; 4. Water-cooled guide screen; 5. Upper header of water-cooled guide screen; 6. Slag condensation pipe; 7. Rear water-cooled wall; 8. Heating surface; 9. Suspension pipe; 10. Steam guide pipe; 11. Steam drum. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0024] See also Figure 1 As shown, an embodiment of the present application provides a waste heat boiler flow equalization suspension device, including: a front water-cooled wall 1, a downcomer 2, a water-cooled guide screen lower header 3, a water-cooled guide screen 4, a water-cooled guide screen upper header 5, a slag condensation pipe 6, a rear water-cooled wall 7, a heating surface 8, a suspension pipe 9, a steam guide pipe 10 and a steam drum 11.

[0025] The water-cooled guide screen 4 is installed at the inlet of the waste heat boiler to play a role in equalizing the flow in the turning flue of the waste heat boiler, so that the high-temperature flue gas flows evenly over the heating surface. As an example, the water-cooled guide screen 4 adopts a full water-cooling structure suitable for high flue gas temperature areas.

[0026] Specifically, the water-cooled guide screen lower header 3 is installed on the center line of the waste heat boiler inlet, and the water-cooled guide screen 4, the water-cooled guide screen upper header 5, the slag condensing pipe 6 and the suspension pipe 9 are installed upward in sequence. The downcomer 2 introduces (un) saturated water from the steam drum 11 into the water-cooled guide screen lower header 3 to cool the water-cooled guide screen 4, the slag condensing pipe 6 and the suspension pipe 9. At the same time, the heating surface 8 is supported by the suspension pipe 9.

[0027] When in use, the downcomer 2 introduces (un) saturated water from the steam drum 11 into the lower header 3 of the water-cooled guide screen, and then sequentially enters the water-cooled guide screen 4, the upper header 5 of the water-cooled guide screen, the slag condensation pipe 6, the suspension pipe 9, the steam guide pipe 10, and finally returns to the steam drum 11. This can ensure good economic practicality and reduce the sealing problem at the wall-penetrating pipe.

[0028] In some embodiments, there are multiple heating surfaces 8 , and the multiple heating surfaces 8 are arranged at intervals along the axial direction of the suspension pipe 9 and are supported by the suspension pipe 9 .

[0029] In some embodiments, the suspension pipe 9 and the slag condensation pipe 6 are integrally formed, the suspension pipe 9 is a straight pipe section, and the slag condensation pipe 6 is a curved section. For example, before the suspension pipe 9 is formed, the front section of the suspension pipe 9 is bent into the heating surface of the slag condensation pipe 6, which can reduce the temperature and reduce the coking of the superheater and reheater.

[0030] The above-mentioned waste heat boiler flow-balanced suspension device has good economical practicality. The water-cooled guide screen 4, the slag condensing pipe 6 and the suspension pipe 9 share the downcomer 2, which reduces the number of downcomers 2 and steam guide pipes 10. At the same time, the slag condensing pipe 6 and the suspension pipe 9 are led out from the upper header 5 of the water-cooled guide screen, which reduces the sealing problem of the wall-penetrating pipe. Moreover, before the suspension pipe 9 is formed, the front section of the suspension pipe 9 is bent into the heating surface of the slag condensing pipe 6, which can play a role in cooling and reducing the coking of the superheater and the reheater.

[0031] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A waste heat boiler flow equalization suspension device, characterized in that: include: Front water-cooled wall, downcomer, lower header of water-cooled guide screen, water-cooled guide screen, upper header of water-cooled guide screen, slag condensation pipe, rear water-cooled wall, heating surface, suspension pipe, steam guide pipe and steam drum; The downcomer is used to introduce saturated water and / or unsaturated water from the steam drum into the lower header of the water-cooled guide screen, and then enter the water-cooled guide screen, the upper header of the water-cooled guide screen, the slag condensation pipe, the suspension pipe, the steam guide pipe in sequence, and finally return to the steam drum.

2. A waste heat boiler flow equalization suspension device according to claim 1, characterized in that: The suspension pipe is used to support the heating surface.

3. The waste heat boiler flow equalization suspension device according to claim 1, characterized in that: There are multiple heating surfaces, and the multiple heating surfaces are arranged at intervals along the axial direction of the suspension pipe.

4. The waste heat boiler flow equalization suspension device according to claim 1, characterized in that: The water-cooled guide screen is installed at the inlet of the waste heat boiler and is used to play a role in flow balancing in the turning flue of the waste heat boiler, so that the high-temperature flue gas flows evenly through the heating surface.

5. A waste heat boiler flow equalization suspension device according to claim 4, characterized in that: The water-cooled guide screen lower header is installed on the center line of the waste heat boiler inlet.

6. A waste heat boiler flow equalization suspension device according to claim 4, characterized in that: The water-cooled guide screen adopts a full water-cooling structure suitable for high smoke temperature areas.

7. The waste heat boiler flow equalization suspension device according to claim 1, characterized in that: The suspension pipe and the slag condensing pipe are integrally formed, the suspension pipe is a straight pipe section, and the slag condensing pipe is a curved section.

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