Heat pipe type waste heat boiler evaporator

Abstract

The utility model discloses a heat pipe type waste heat boiler evaporator, which belongs to the technical field of evaporators and comprises a shell, a heat pipe and a tank body, the shell is provided with a first cavity and a second cavity which are separated by a partition plate, the heat pipe is provided with a pipe body, fins, an inner ring and an outer ring, the pipe body is filled with heat exchange media, the fins are welded and connected to the upper side and the lower side of the pipe body, and the inner ring is connected with the outer ring. The inner ring sleeves the periphery of the middle of the heat pipe, the outer diameter of the inner ring is smaller than that of the fins, the outer ring sleeves the outer side of the inner ring, the outer diameter of the outer ring is larger than that of the fins, the outer ring is inserted into a mounting hole correspondingly formed in the partition plate, the tank body is circularly communicated with the second cavity through a pipeline, and the pipe body is further provided with a steam outlet and a softened water inlet. According to the heat pipe type waste heat boiler evaporator, the excessive inner ring is arranged on the periphery of the heat pipe, the outer ring is installed on the outer side of the inner ring, when the heat pipe needs to be replaced, only the heat pipe and the inner ring need to be replaced, and the outer ring can be repeatedly used, so that the maintenance cost of the heat pipe is reduced, namely the maintenance cost of the heat pipe type waste heat boiler evaporator can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, and in particular to a heat pipe type waste heat boiler evaporator. Background Technology

[0002] Heat pipe evaporators are commonly used flue gas waste heat recovery devices in industries such as steel, chemical, and power. Their working principle is as follows: high-temperature flue gas passes through the surface of the heat exchange tube bundle of the heat pipe evaporator, transferring heat to the heat pipe bundle. The heat exchange medium in the heat pipes has highly efficient heat transfer performance, rapidly transferring heat from the flue gas to the softened water inside the evaporator. The water, after being heated, becomes a steam-water mixture, which is discharged into a softened water tank through pipes. Steam is discharged through the tank, and the condensed softened water descends into the tank and enters the next heat exchange cycle.

[0003] A patent application titled "An Internally Grooved Heat Pipe Device for a Sintered Flue Waste Heat Boiler" (publication number CN 209978681U) is published in the Chinese Patent Database. Its structure mainly includes a heat pipe with a central waist plate installed in the middle. Sealing rings are arranged around the central waist plate, and the heat pipe is installed in the waste heat boiler through the central waist plate and sealing rings. The drawback of this internally grooved heat pipe device is that, as seen in the accompanying drawings, the outer diameter of the central waist plate is larger than the outer diameter of the fins. This is undeniable based on its structure. If the aperture of the central waist plate inserted into the waste heat boiler is smaller than the outer diameter of the fins, the heat pipe cannot be installed due to the excessively large outer diameter of the fins. Therefore, the outer diameter of the central waist plate must be larger than the outer diameter of the fins. When the heat pipe needs to be replaced during future maintenance, the excessively large outer diameter of the central waist plate will increase the cost of subsequent maintenance work. Utility Model Content

[0004] This application provides a heat pipe type waste heat boiler evaporator to reduce the maintenance costs of heat pipes in the equipment.

[0005] This application provides a heat pipe type waste heat boiler evaporator, including:

[0006] The outer casing has a first cavity and a second cavity separated by a partition. The outer casing has an air inlet and an exhaust outlet communicating with the first cavity, and a liquid inlet and a liquid outlet communicating with the second cavity.

[0007] A heat pipe has a tube body, fins, an inner ring and an outer ring. The fins are provided on both the upper and lower sides of the tube body. The inner ring is sleeved on the outer periphery of the middle part of the heat pipe. The outer diameter of the inner ring is smaller than the outer diameter of the fins. The outer ring is sleeved on the outside of the inner ring and inserted into the corresponding mounting hole of the partition.

[0008] The tank body is connected to the liquid inlet and liquid outlet respectively via pipes, and the pipe body also has a steam outlet and a softened water inlet.

[0009] The beneficial effects of the above embodiments are as follows: by setting an inner ring for use around the heat pipe and installing an outer ring outside the inner ring, when the heat pipe needs to be replaced, only the heat pipe and the inner ring need to be replaced, and the outer ring can be reused repeatedly, thereby reducing the maintenance cost of the heat pipe, that is, reducing the maintenance cost of the heat pipe type waste heat boiler evaporator.

[0010] Based on the above embodiments, the embodiments of this application can be further improved as follows:

[0011] In one embodiment of this application: an ash discharge port is provided at the lower end of the outer casing, and the ash discharge port is connected to an ash discharge valve. The beneficial effect of this step is that the ash discharge valve facilitates the discharge of soot from the first chamber.

[0012] In one embodiment of this application: the lower end of the tank has a drain port, and the drain port is connected to a drain valve. The beneficial effect of this step is that the drain valve facilitates the discharge of liquid from the tank.

[0013] In one embodiment of this application, the outer ring comprises a first outer half-ring and a second outer half-ring that are interconnected. The advantage of this step is that designing the outer ring as a two-half-ring structure facilitates its installation on the inner ring.

[0014] In one embodiment of this application, the heat pipe further includes a sealing assembly disposed between the outer ring and the inner ring, and between the outer ring and the mounting hole. The beneficial effect of this step is that the sealing assembly improves the sealing effect between the first cavity and the second cavity component after the heat pipe is installed.

[0015] In one embodiment of this application, the fin surface is provided with multiple ash leakage holes. The beneficial effect of this step is that by providing ash leakage holes, excessive accumulation of soot on the fin surface is prevented. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of a heat pipe type waste heat boiler evaporator.

[0018] Figure 2 This is a schematic diagram of a heat pipe structure;

[0019] Figure 3This is a cross-sectional view of the outer ring.

[0020] Figure 4 This is a cross-sectional view of the connection between the outer ring and the inner ring;

[0021] Figure 5 A cross-sectional view of the outer ring when it is positioned within the mounting hole;

[0022] Figure 6 This is a schematic diagram of the fin structure.

[0023] Among them, 1 is the outer shell, 101 is the partition, 102 is the first cavity, 103 is the second cavity, 104 is the air inlet, 105 is the exhaust port, 106 is the liquid inlet, and 107 is the liquid outlet.

[0024] 2 heat pipe, 201 pipe body, 202 fins, 203 inner ring, 204 outer ring, 205 first outer half ring, 206 second outer half ring, 207 boss, 208 groove, 209 raised ring, 210 ring groove, 211 shoulder;

[0025] 3 tanks, 301 steam outlet, 302 softened water inlet;

[0026] 4. Ash discharge valve;

[0027] 5. Drain valves;

[0028] 6. Sealing assembly, 601 first sealing ring, 602 second sealing ring, 603 sealing gasket. Detailed Implementation

[0029] In this application, unless otherwise expressly specified and limited, the terminology used should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of different terms in this utility model according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0031] like Figure 1 , 2As shown, a heat pipe type waste heat boiler evaporator includes: an outer shell 1, a heat pipe 2, and a tank 3. The outer shell 1 has a first cavity 102 and a second cavity 103 separated by a partition 101. The outer shell 1 has an air inlet 104 and an exhaust outlet 105 communicating with the first cavity 102, and a liquid inlet 106 and a liquid outlet 107 communicating with the second cavity 103. The heat pipe 2 has a tube body 201, fins 202, an inner ring 203, and an outer ring 204. The tube body 201 is filled with a heat exchange medium. The tube body 201 has fins 202 welded to both the upper and lower sides. The inner ring 203 is sleeved on the outer periphery of the middle part of the heat pipe 2. The outer diameter of the inner ring 203 is smaller than the outer diameter of the fins 202. The outer ring 204 is sleeved on the outside of the inner ring 203. The outer diameter of the outer ring 204 is larger than the outer diameter of the fins 202. The outer ring 204 is inserted into the corresponding mounting hole opened in the partition plate 101. The tank body 3 is connected to the liquid inlet 106 and the liquid outlet 107 through pipes respectively. The tube body 201 also has a steam outlet 301 and a softened water inlet 302.

[0032] In some embodiments of this application, such as Figure 1 As shown, the outer shell 1 is a horizontal structure. The lower part of the outer shell 1 is fixed to the ground by a bracket. The second cavity 103 is located above the first cavity 102. The air inlet 104 is used to introduce high-temperature flue gas, and the exhaust port 105 is used to discharge low-temperature flue gas after heat exchange and cooling through the heat pipe 2. The height of the liquid inlet 106 is lower than that of the liquid outlet 107. The liquid inlet 106 is used to introduce softened water from the tank 3 into the second cavity 103. The liquid outlet 107 is used to discharge the steam-water mixture that has been heated to boiling and evaporated at high temperature into the tank 3. The uppermost part of the tank 3 has a steam outlet 301. High-temperature steam is discharged through the steam outlet 301. Some of the condensed liquid falls back into the tank 3 for the next heat exchange cycle. The tank 3 has a softened water inlet 302 adjacent to the steam outlet 301 at an angle above it. The softened water inlet 302 is used to replenish softened water into the tank 3.

[0033] In some embodiments of this application, such as Figure 1 As shown, the lower end of the outer shell 1 has an ash discharge port with a cone tip pointing downwards. The ash discharge port is connected to an ash discharge valve 4, which facilitates the discharge of soot from the first cavity 102.

[0034] In some embodiments of this application, such as Figure 1 As shown, the lower end of the tank 3 has a drain port, which is connected to a drain valve 5, allowing the liquid in the tank 3 to be discharged easily.

[0035] In some embodiments of this application, such as Figure 3As shown, the outer ring 204 includes a first outer half-ring 205 and a second outer half-ring 206 that are interconnected, both being semi-circular ring structures. A boss 207 is disposed at the center of the end face of the first outer half-ring 205, and a groove 208 is disposed at the end of the second outer half-ring 206 corresponding to the boss 207. The boss 207 is inserted into the groove 208, and the threaded end of a bolt is inserted into the groove 208 and threadedly connected to a threaded hole on the surface of the boss 207. Designing the outer ring 204 as two semi-ring structures facilitates its installation on the inner ring 203.

[0036] In some embodiments of this application, such as Figure 3 , 4 As shown, an annular convex ring 209 is arranged at the middle position of the inner side of the outer ring 204, and an annular groove 210 is arranged on the inner ring 203 corresponding to the convex ring 209. The convex ring 209 is inserted into the annular groove 210, thereby positioning the outer ring 204 on the inner ring 203.

[0037] In some embodiments of this application, such as Figure 3-5 As shown, the heat pipe 2 also includes a sealing assembly 6, which is disposed between the outer ring 204 and the inner ring 203, and between the outer ring 204 and the mounting hole.

[0038] In some embodiments of this application, such as Figure 3-5 As shown, the sealing assembly 6 includes: a first sealing ring 601, a second sealing ring 602, and a sealing gasket 603. A first sealing groove is formed on the outer circumference of the outer ring 204 along the thickness direction. The first sealing ring 601 is fitted in the first sealing groove. The first sealing ring 601 cooperates with the wall of the mounting hole to form a sealing structure. When the first sealing groove is formed, care should be taken to ensure that it is offset from the groove for placing bolts in the height direction to avoid excessive mutual interference. A second sealing groove is formed on the inner wall of the ring groove 210. The second sealing ring 602 is fitted in the second sealing groove. The second sealing ring 602 forms a sealing structure with the outer wall of the convex ring 209. The sealing gasket 603 has the same shape as the end face of the first outer half ring 205, and the sealing gasket 603 has a matching through hole corresponding to the boss 207. The sealing gasket 603 is fitted on the boss 207 and is located between the end faces of the first outer half ring 205 and the second outer half ring 206, forming a sealing structure between the two through the sealing gasket 603. The triple sealing structure described above achieves sealing between the inner ring 203 and the outer ring 204, and between the outer ring 204 and the mounting hole, thereby improving the sealing effect of the first cavity 102 and the second cavity 103.

[0039] In some embodiments of this application, such as Figure 5As shown, a shoulder 211 is provided on the upper part of the outer ring 204. The shoulder 211 is used to press against the upper surface of the partition 101, thereby positioning the outer ring 204 on the partition 101. In addition, in order to improve the stability of the connection between the outer ring 204 and the partition 101, a hole can be drilled in the shoulder 211, and a bolt can be passed through the through hole to connect with the partition 101.

[0040] In some embodiments of this application, such as Figure 6 As shown, multiple ash leakage holes 212 are provided on the surface of the fin 202. Specifically, the ash leakage holes 212 are radial strip-shaped holes provided on the surface of the fin 202. By providing ash leakage holes 212, the height of soot accumulation on the surface of the fin 202 can be reduced, thereby avoiding excessive accumulation of soot on the surface of the fin 202, thus ensuring the heat exchange efficiency of the heat pipe 2.

[0041] When this type of heat pipe waste heat boiler evaporator is working, high-temperature flue gas passes through the inlet pipe. The high-temperature flue gas contacts the lower fins 202 of the heat pipe 2 in the first chamber 102. The heat exchange medium in the fins 202 is heated and evaporates, moving to one end of the second chamber 103. The high-temperature gaseous heat exchange medium releases heat to the outside and heats the softened water. The softened water evaporates and vaporizes, forming a steam-water mixture, which is discharged into the tank 3 through the drain port 107. After the heat exchange medium cools down at one end of the second chamber 103, it liquefies and falls down the inner wall of the pipe 201 into one end of the first chamber 102. This cycle of heat exchange continues. The cooled flue gas is discharged through the exhaust port 105.

[0042] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A heat pipe type waste heat boiler evaporator, characterized in that, include: The outer casing has a first cavity and a second cavity separated by a partition. The outer casing has an air inlet and an exhaust outlet communicating with the first cavity, and a liquid inlet and a liquid outlet communicating with the second cavity. A heat pipe has a tube body, fins, an inner ring and an outer ring. The fins are provided on both the upper and lower sides of the tube body. The inner ring is sleeved on the outer periphery of the middle part of the heat pipe. The outer diameter of the inner ring is smaller than the outer diameter of the fins. The outer ring is sleeved on the outside of the inner ring and inserted into the corresponding mounting hole of the partition. The tank body is connected to the liquid inlet and liquid outlet respectively via pipes, and the pipe body also has a steam outlet and a softened water inlet.

2. The heat pipe type waste heat boiler evaporator according to claim 1, characterized in that, The lower end of the outer shell is provided with an ash discharge port, which is connected to an ash discharge valve.

3. The heat pipe type waste heat boiler evaporator according to claim 1, characterized in that, The lower end of the tank has a drain port, which is connected to a drain valve.

4. The heat pipe type waste heat boiler evaporator according to claim 1, characterized in that, The outer ring comprises a first outer half-ring and a second outer half-ring that are interconnected.

5. The heat pipe type waste heat boiler evaporator according to claim 1, characterized in that, The heat pipe further includes a sealing assembly disposed between the outer ring and the inner ring, and between the outer ring and the mounting hole.

6. The heat pipe type waste heat boiler evaporator according to claim 1, characterized in that, The fin surface has multiple ash leakage holes.

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