Boiler preheating water tank

Abstract

The utility model discloses a boiler preheats water tank relates to preheats water tank technical field, including water tank body, the heating assembly of heating cold water is equipped in water tank body inside, the heating assembly includes the first heating unit for water tank body side heating and the second heating unit for water tank body middle heating, the both ends of water tank body are provided with end cover, and the water inlet pipe and the water outlet pipe are respectively arranged on two end covers. The utility model first heating unit and second heating unit heat the cold water of water tank body edge and this middle respectively, and the pipeline inside first heating unit and second heating unit is fully exposed in the cold water in water tank body, makes the heat exchange area of pipeline and cold water be bigger, can fastly preheat the cold water to the temperature of expectation, and the efficiency is fast.

Description

Technical Field

[0001] This utility model relates to the field of preheating water tank technology, and in particular to boiler preheating water tank. Background Technology

[0002] The boiler preheating water tank (also known as a preheating tank or feedwater preheater) is a crucial energy-saving component in a boiler system. Its primary function is to preheat cold water before it enters the boiler body. The preheating water tank utilizes waste heat from boiler flue gas or other waste heat to preheat the feedwater, significantly reducing the boiler's fuel consumption.

[0003] In the existing technology, the heat exchange efficiency between the flue gas pipe and the cold water in the preheating water tank is low, making it difficult to make full use of the waste heat of the flue gas, and the cold water also heats up slowly, which is difficult to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to propose a boiler preheating water tank to solve the problem of low heat exchange efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A boiler preheating water tank includes a tank body. The tank body is equipped with a heating component for heating cold water. The heating component includes a first heating unit for heating the side of the tank body and a second heating unit for heating the middle of the tank body. The tank body is provided with end caps at both the top and bottom ends, and an inlet pipe and an outlet pipe are respectively provided on the two end caps.

[0006] As a further description of the above technical solution: the first heating unit includes a side tube fixedly installed between two end caps, a bifurcated hole connected to the side tube, and an air inlet and an air outlet respectively provided on the two end caps. A collection hole is opened in the end cap, and the ends of the bifurcated holes are all connected to the collection hole. The air inlet and the air outlet are also connected to the collection hole. The outer wall of the side tube is not attached to the inner wall of the water tank body, and there is a gap between them.

[0007] As a further description of the above technical solution: the second heating unit includes a branch pipe fixedly installed on the central tube, the interior of the branch pipe being connected to the interior of the central tube, and the central tube being fixedly installed between two end caps and connected to the collection holes in the two end caps.

[0008] As a further description of the above technical solution: the water tank body includes an outer protective layer and an inner heat insulation layer.

[0009] As a further description of the above technical solution: three filter plates are provided inside the end cap at the bottom, and the passability of the three filter plates is worse the closer they are to the center of the end cap.

[0010] As a further description of the above technical solution: a movable block is movably installed inside the end cover at the bottom. The movable block is detachably installed on the end cover via a fixing plate. When the end of the movable block is located inside the end cover, it can abut against the side of the filter plate.

[0011] As a further description of the above technical solution: the connection between the movable block and the end cap is sealed.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The first heating unit and the second heating unit heat the cold water at the edge of the water tank body and in the middle, respectively. The pipes inside the first heating unit and the second heating unit are fully exposed to the cold water in the water tank body, which makes the heat exchange area between the pipes and the cold water large, and can quickly preheat the cold water to the expected temperature with high efficiency. 2. During the process of flue gas entering the lower end cover from the air inlet pipe, the flue gas will pass through the filter plates in sequence. The filter plates filter the particulate matter inside the flue gas to prevent the particulate matter from sticking to the pipes inside the water tank body and affecting heat exchange. The less permeable the flue gas is along the way, the more the filter plates filter the flue gas in stages, thus improving the filtration effect of the filter plates. Attached Figure Description

[0013] Figure 1 A schematic diagram of the front view structure according to an embodiment of the present utility model is shown; Figure 2 A cross-sectional structural schematic diagram of the water tank body according to an embodiment of the present utility model is shown; Figure 3 A schematic diagram of the central tube and branch tube structure according to an embodiment of the present invention is shown; Figure 4 A schematic diagram showing the connection relationship between the branching hole and the converging hole according to an embodiment of the present invention is shown; Figure 5 A schematic cross-sectional view of the end cap structure according to an embodiment of the present invention is shown; Figure 6 The present invention provides an embodiment of the present invention. Figure 5 Enlarged diagram of point A in the middle.

[0014] Legend: 1. Water tank body; 11. End cap; 12. Inlet pipe; 13. Outlet pipe; 2. Side pipe; 21. Branch hole; 22. Collection hole; 23. Air inlet pipe; 24. Air outlet; 3. Central pipe; 31. Branch pipe; 4. Protective layer; 41. Heat insulation layer; 5. Filter plate; 6. Movable block; 61. Fixed plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: This example provides a boiler preheating water tank, see [link / reference]. Figure 1 - Figure 6 Specifically, it includes a water tank body 1, inside which is a heating component for heating cold water. The heating component includes a first heating unit for heating the side of the water tank body 1 and a second heating unit for heating the middle of the water tank body 1. Both the upper and lower ends of the water tank body 1 are provided with end caps 11, and the two end caps 11 are respectively provided with an inlet pipe 13 and an outlet pipe 12. First, cold water is transported into the water tank body 1 through the inlet pipe 13. The first heating unit and the second heating unit heat the cold water at the edge and in the middle of the water tank body 1, respectively. The pipes inside the first heating unit and the second heating unit are fully exposed to the cold water in the water tank body 1, so that the heat exchange area between the pipes and the cold water is large, which can quickly preheat the cold water to the expected temperature. The efficiency is fast. After the preheating is completed, the hot water is discharged through the outlet pipe 12 and transported into the boiler. It should be noted that the device needs to heat the cold water in the water tank body 1 to about 100 degrees. After the boiler is running normally, the temperature of the water in the water tank body 1 can be maintained at about 100 degrees. Then, the high temperature water in the water tank body 1 is used to add water to the boiler. This greatly saves fuel and improves the economy of the whole process. The first heating unit includes a side tube 2 fixedly installed between two end caps 11, a bifurcated hole 21 connected to the side tube 2, and an air inlet pipe 23 and an air outlet 24 respectively provided on the two end caps 11. A collection hole 22 is provided inside the end cap 11. The ends of the bifurcated holes 21 are all connected to the collection hole 22, and the air inlet pipe 23 and the air outlet 24 are all connected to the collection hole 22. The outer wall of the side tube 2 is not attached to the inner wall of the water tank body 1, and there is a gap between them. The flue gas enters the collecting hole 22 from the inlet pipe 23, then enters the branching hole 21 from the collecting hole 22, and then enters the side pipe 2. The flue gas moves from bottom to top from the side pipe 2. Since there is a gap between the side pipe 2 and the water tank body 1, the outer surface of the side pipe 2 is in full contact with the cold water, which increases the heat exchange area and quickly heats the cold water at the edge of the water tank body 1. The second heating unit includes a branch pipe 31 fixedly installed on the central pipe 3. The interior of the branch pipe 31 is connected to the interior of the central pipe 3. The central pipe 3 is fixedly installed between two end caps 11 and is connected to the collection hole 22 inside the two end caps 11. The flue gas enters the central pipe 3, and then enters the branch pipe 31 from the central pipe 3. The branch pipe 31 is outwardly flared, and both the central pipe 3 and the branch pipe 31 are located in the middle of the water tank body 1. The outer surfaces of the central pipe 3 and the branch pipe 31 are all in contact with the cold water, increasing the heat exchange area and quickly heating the cold water in the middle of the water tank body 1. The water tank body 1 includes an outer protective layer 4 and an inner heat insulation layer 41; The protective layer 4 increases the rigidity of the entire water tank body 1, and the heat insulation layer 41 keeps the water inside the water tank body 1 warm, thereby increasing the preheating speed of the water tank for cold water. Three filter plates 5 are provided inside the lower end cap 11. The closer the three filter plates 5 are to the center of the end cap 11, the worse their permeability. During the process of flue gas entering the lower end cap 11 from the inlet pipe 23, the flue gas will pass through the filter plate 5 in sequence. The filter plate 5 filters the particulate matter inside the flue gas to prevent the particulate matter from sticking to the pipe inside the water tank body 1 and affecting heat exchange. The worse the flue gas passes through the filter plate 5, the more the filter plate 5 filters the flue gas in segments, thus improving the filtration effect of the filter plate 5. A movable block 6 is movably installed inside the lower end cover 11. The movable block 6 is detachably installed on the end cover 11 via a fixing plate 61. When the end of the movable block 6 is located inside the end cover 11, it can abut against the side of the filter plate 5. The connection between the movable block 6 and the end cover 11 is sealed. By loosening the movable block 6 by fixing plate 61, the movable block 6 can be pulled out from inside end cover 11, allowing the filter plate 5 to be cleaned, removing accumulated particles, ensuring the passage of flue gas and preventing blockage.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boiler preheating water tank, characterized in that, include: The water tank body (1) is equipped with a heating component for heating cold water. The heating component includes a first heating unit for heating the side of the water tank body (1) and a second heating unit for heating the middle of the water tank body (1). Both the upper and lower ends of the water tank body (1) are provided with end caps (11). The two end caps (11) are respectively provided with an inlet pipe (13) and an outlet pipe (12).

2. The boiler preheating water tank according to claim 1, characterized in that, The first heating unit includes a side tube (2) fixedly installed between two end caps (11), a bifurcated hole (21) connected to the side tube (2), and an air inlet (23) and an air outlet (24) respectively provided on the two end caps (11). A collection hole (22) is provided in the end cap (11). The ends of the bifurcated holes (21) are all connected to the collection hole (22), and the air inlet (23) and the air outlet (24) are all connected to the collection hole (22). The outer wall of the side tube (2) is not attached to the inner wall of the water tank body (1), and there is a gap between them.

3. The boiler preheating water tank according to claim 2, characterized in that, The second heating unit includes a branch pipe (31) fixedly installed on the central tube (3). The inside of the branch pipe (31) is connected to the inside of the central tube (3). The central tube (3) is fixedly installed between two end caps (11) and is connected to the collection hole (22) inside the two end caps (11).

4. The boiler preheating water tank according to claim 1, characterized in that, The water tank body (1) includes an outer protective layer (4) and an inner heat insulation layer (41).

5. The boiler preheating water tank according to claim 1, characterized in that, The end cap (11) at the bottom is provided with three filter plates (5), and the closer the three filter plates (5) are to the center of the end cap (11), the worse their permeability.

6. The boiler preheating water tank according to claim 5, characterized in that, A movable block (6) is movably installed inside the end cap (11) at the bottom. The movable block (6) is detachably installed on the end cap (11) via a fixing plate (61). The movable block (6) is located inside the end cap (11) and can abut against the side of the filter plate (5) when closed.

7. The boiler preheating water tank according to claim 6, characterized in that, The connection between the movable block (6) and the end cap (11) is sealed.

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