Water cooling wall of uniform-temperature boiler

Abstract

The invention provides a uniform-temperature boiler water-cooled wall, which belongs to the technical field of boiler water-cooled walls, and comprises two water-cooled wall cylinders with the same structure and a heat storage pool structure, and each cylinder is formed by enclosing a boiler by a plurality of thermosyphon uniform-temperature units through a connecting assembly. Each unit comprises a heat exchange temperature equalizing body, a thermosiphon and a heat conduction device, the temperature equalizing body comprises a liquid injection containing cavity and a liquid absorption core, and the thermosiphon and the heat conduction device form a closed circulation loop. The two cylinder temperature equalizing bodies are stacked, the heat conductors are arranged in the heat storage pool at the same height at intervals, the phase change material in the pool stores heat, and the heat exchange pipe guides out waste heat.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of boiler water wall, and particularly relates to a uniform-temperature boiler water wall. BACKGROUND

[0002] The boiler is long-term operated in the high-temperature furnace environment, and the wall surface is easy to generate thermal damage (such as thermal fatigue, local overheating corrosion, etc.) due to continuously bearing high-temperature load, so the water wall system must be relied on to forcibly cool the furnace wall, which is the core link to guarantee the structural safety and stable operation of the boiler.

[0003] Inside the boiler furnace, the flame form and spatial distribution formed by fuel combustion are difficult to achieve complete uniformity and stability. For example, if the burner arrangement angle deviation, air distribution imbalance or fuel injection is uneven, the flame is easy to deviate to one side or a local area of the furnace, so that the water wall in the area directly bears a radiation heat flux density much higher than other parts, and then a local thermal load is sharply increased, forming a "hot spot" with a temperature significantly higher than the surrounding. The heat transfer mechanism of the traditional water wall relies on the circulation pump to drive the flow of the working medium (water or steam-water mixture) in the pipe, and absorbs the radiation heat of the furnace through the convective heat transfer between the working medium and the pipe wall and carries it away. This way can effectively play a role when the thermal load distribution of the furnace is relatively uniform, but it has obvious shortcomings when facing "local hot spots": the heat accumulated in the hot spot area far exceeds the heat carrying capacity of the convective heat transfer of the working medium, and the heat cannot be dissipated in time, eventually leading to a continuous rise in the local temperature of the water wall, forming a significant "hot spot temperature difference" and aggravating the risk of wall surface thermal damage.

[0004] In view of the deficiency of the traditional water wall in cooling the hot spot, the present application proposes a uniform-temperature boiler water wall, which does not need to rely on the circulation pump to drive the flow of the working medium, and can realize rapid heat dissipation of the local hot spot by optimizing the heat transfer path and the phase change characteristics of the working medium, and fundamentally improve the temperature distribution uniformity of the water wall. SUMMARY

[0005] The present application proposes a uniform-temperature boiler water wall, which can realize rapid heat dissipation and temperature uniformity of the boiler wall, and effectively utilize the waste heat of the boiler wall temperature on the basis of reducing temperature fluctuation.

[0006] In order to achieve the above purpose, the present application proposes the following technical scheme: An even temperature boiler water wall, comprising two water wall cylinders and a heat storage pool structure, the two water wall cylinders are respectively denoted as water wall cylinder A and water wall cylinder B, the water wall cylinder A and the water wall cylinder B are the same structure, as observed from one of the water wall cylinders, the water wall cylinder comprises a plurality of thermosyphon even temperature units, each thermosyphon even temperature unit is arrayed along the axis of the boiler and is arranged around and attached to the outer surface of the boiler, in the circumferential direction, the plurality of thermosyphon even temperature units just surround the outer surface of the boiler for one round, and only a thin gap is left between the adjacent two thermosyphon even temperature units, and the plurality of thermosyphon even temperature units are bound into a whole by a connecting assembly; the thermosyphon even temperature unit comprises: a heat exchange even temperature body in the shape of a hollow cuboid, which is internally provided with a cavity in contact with the outer surface of the boiler; a liquid working medium capable of realizing heat exchange is injected into the cavity; a wick is placed in the interior of the cavity; a thermosyphon connected with the heat exchange even temperature body and in surface contact with the heat exchange even temperature body; both open ends of the thermosyphon are connected with the same heat conductor, the thermosyphon and the heat conductor form a closed loop, a liquid working medium is injected into the heat conductor, the liquid working medium can receive the heat transferred by the heat exchange even temperature body and circulate in the thermosyphon and the heat conductor; the heat exchange even temperature bodies of the water wall cylinder A are stacked on the heat exchange even temperature bodies of the water wall cylinder B, the heat conductors of the water wall cylinder A and the heat conductors of the water wall cylinder B are at the same height and are arranged in intervals one by one, the heat conductors of the water wall cylinder A and the heat conductors of the water wall cylinder B are both placed in the heat storage pool structure, the heat storage pool structure is provided with a solid-liquid phase change material, the solid-liquid phase change material is liquefied after receiving the heat of the heat conductors; the heat storage pool structure is provided with a heat exchange pipe for heat exchange with the solid-liquid phase change material in the heat storage pool structure, both ends of the heat exchange pipe pass out of the heat storage pool structure, and a liquid is introduced into the heat exchange pipe.

[0007] 1. The scheme utilizes the phase change and circulation of the working medium in the thermosyphon even temperature unit to quickly dissipate the heat of the local "hot spot" of the boiler without a circulating pump, effectively weakens the temperature difference of the hot spot, and reduces the risk of wall surface thermal damage.

[0008] 2. The double water wall cylinders are stacked and the heat conductors are arranged in intervals, combined with the heat storage of the phase change material in the heat storage pool, the overall temperature distribution uniformity of the water wall is significantly improved, and the temperature fluctuation is reduced.

[0009] 3. The heat storage pool realizes the heat exchange between the phase change material and the external liquid through the heat exchange pipe, can efficiently recover and utilize the waste heat of the boiler wall temperature, and has the cooling even temperature and energy saving benefits.

[0010] Further, a strip-shaped groove is arranged on the side surface of the heat exchange even temperature body away from the boiler, and the thermosyphon comprises: a connecting pipe fixedly connected in the strip-shaped groove by interference connection, both upper and lower ends of the connecting pipe are closed; A plurality of short pipes, B short pipes are set, one end of the B short pipes is fixedly connected with the side wall of the connecting pipe and communicates with the connecting pipe; Two main pipes, the lengths of the two main pipes are not equal, and the upper ends of the two main pipes are closed and the lower ends are open; wherein the other end of the B1 short pipes is fixedly connected with the side wall of one of the main pipes and communicates with the main pipe, and the other end of the B2 short pipes is fixedly connected with the side wall of the other main pipe and communicates with the main pipe, B=B1+B2; A heat conduction device is internally provided with a cavity, and two holes are formed in the upper surface of the heat conduction device, the lower ends of the two main pipes are connected with the holes and communicate with the cavity, and liquid naphthalene is filled in the heat conduction device.

[0011] 1, the connecting pipe is connected with the strip-shaped groove in interference, and the design of the multiple short pipes connecting the unequal-length main pipes can quickly conduct the heat absorbed by the heat exchange equalizing body to the heat conduction device, improving the heat transfer efficiency and the rationality of the path.

[0012] 2, the lengths of the two main pipes are not equal to adapt to the demand of the double water-cooled wall cylinder heat conduction device with the same height and interval arrangement, which provides protection for the overall structure assembly and limiting, and ensures that the heat can be concentrated and introduced into the heat storage pool.

[0013] 3, the liquid naphthalene filled in the closed loop adapts to the temperature range of the boiler operation, and the phase change characteristics can efficiently drive the heat to circulate between the thermosyphon and the heat conduction device, and strengthen the heat dissipation effect on the boiler wall surface.

[0014] Further, the heat storage pool structure comprises: a heat storage pool main body, which is based on a horizontally placed disc-shaped blank, and forms a pool groove after being cut from top to bottom; The middle part of the pool groove is provided with an annular plate, the annular plate is sleeved on all the heat conduction devices, and the inner wall of the annular plate is in contact with all the heat conduction devices; Both ends of the heat exchange pipe penetrate out of the pool groove, and the heat exchange pipe is provided with heat exchange fins along its trajectory.

[0015] 1, the annular plate is limited by contacting all the heat conduction devices, which ensures the installation stability and position accuracy of the overall structure of the double water-cooled wall cylinder and the heat conduction device.

[0016] 2, the heat exchange pipe with heat exchange fins is designed, which greatly increases the heat exchange area with the phase change material, and can efficiently transfer the heat stored by the phase change material to the liquid in the pipe, improving the waste heat recovery efficiency.

[0017] Further, the height of the annular plate is lower than the depth of the pool groove.

[0018] 1, it is ensured that the heat-absorbing liquidized solid-liquid phase change material can overflow the upper end surface of the heat conduction device, so that the heat conduction device can be completely immersed in the liquid phase change material, and the contact area and heat exchange efficiency of the heat conduction device and the phase change material are significantly improved.

[0019] 2. The liquid phase change material is provided with a flow space to facilitate circulation in the tank, balance the temperature in different areas, avoid local heat accumulation, and ensure the uniformity of heat storage and heat exchange of the heat storage tank.

[0020] Further, the connecting assembly is a clamp, the clamp units of the clamp pass through the gap between adjacent short pipes and lock adjacent clamp units by bolts.

[0021] Further, the wick is formed by sintering of metal powder, the porosity is 0.5-1mm, and the wick is formed into a "mountain" shaped structure after sintering by cutting, and is connected with the inner wall of the cavity in interference.

[0022] 1. The wick sintered by metal powder and having a porosity of 0.5-1mm can efficiently absorb the liquid working medium through capillary action, provide stable power for the reflux of the working medium from the condensing area to the evaporating area, and ensure the continuous operation of the thermosyphon cycle.

[0023] 2. The "mountain" shaped structure greatly increases the contact area of the wick and the working medium, strengthens the adsorption and heat exchange effect of the working medium, and improves the heat conduction efficiency of the heat exchange uniform body.

[0024] 3. The interference connection with the inner wall of the cavity can firmly position the wick and avoid displacement of the wick during the circulation of the working medium or the operation of the boiler, ensuring the stability and reliability of the heat transfer structure.

[0025] By adopting the above technical content, the beneficial effects achieved by the present scheme are: 1. For the shortcoming of the traditional water cooling wall relying on a circulating pump and the heat in the hot spot area being unable to be timely dissipated, the present scheme forms a high-efficiency heat transfer loop without a circulating pump through the phase change circulation (evaporation heat absorption, condensation heat release) of the working medium in the thermosyphon uniform unit and the capillary reflux action of the "mountain" shaped wick, can quickly dissipate the heat accumulated in the hot spot area, fundamentally solves the problem that the heat in the hot spot exceeds the heat carrying capacity of the working medium, effectively eliminates the temperature difference of the hot spot, and reduces the risk of thermal fatigue, local overheating corrosion and other thermal damage.

[0026] 2. For the problem that the flame shape and heat flow distribution in the furnace are difficult to be uniform, the present scheme adopts the structure that the double water cooling wall cylinders are stacked and covered, and the heat conductors are arranged in a staggered manner, and in combination with the characteristics of the large amount of heat storage of the solid-liquid phase change material in the heat storage tank and the liquid flow uniformity, the temperature in each area of the water cooling wall can be balanced, local temperature rise can be avoided, the adaptability of the present scheme is stronger than that of the traditional water cooling wall under the condition of uneven heat load, and the uniformity and operation stability of the wall surface temperature distribution are greatly improved.

[0027] 3. The traditional water-cooled wall can only realize the cooling function. On the basis of solving the heat dissipation and temperature equalization problems, the heat stored in the phase change material in the heat storage pool and the heat exchange pipe with heat exchange fins can efficiently recover and utilize the waste heat of the boiler wall temperature (such as heating external liquid), which can ensure the safe operation of the boiler and improve the energy utilization efficiency, and realize the dual effects of "cooling protection + waste heat utilization". BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure diagram of the water-cooled wall; Figure 2 is the structure diagram of the water-cooled wall cylinder A without embracing hoop; Figure 3 is the structure diagram of the water-cooled wall cylinder B without embracing hoop; Figure 4 is the structure diagram of the thermosyphon temperature equalization unit; Figure 5 is the structure diagram of the heat exchange temperature equalization body; Figure 6 is the structure diagram of the thermosyphon pipe; Figure 7 is the structure diagram of the heat conduction device; Figure 8 is the structure diagram of the heat storage pool main body.

[0029] 1. Water-cooled wall cylinder A; 2. Water-cooled wall cylinder B; 3. Heat storage pool structure; 4. Heat exchange temperature equalization body; 41. Strip-shaped arc plate; 42. Side plate; 43. Bottom plate; 44. Liquid absorbing core; 45. Strip-shaped groove; 5. Thermosyphon pipe; 51. Connecting pipe; 52. Short pipe; 53. Main pipe; 54. Heat conduction device; 541. Connection hole; 6. Embracing hoop; 7. Heat storage pool main body; 71. Pool groove; 72. Annular plate; 73. Heat exchange pipe; 74. Heat exchange fin. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] As shown in Figure 1 , Figure 2 and Figure 3 , a temperature equalization boiler water-cooled wall comprises two water-cooled wall cylinders, which are denoted as water-cooled wall cylinder A1 and water-cooled wall cylinder B2 respectively. The structures of the two water-cooled wall cylinders are the same, and only the size of the following-described thermosyphon pipe 5 is different.

[0032] See Figure 4 With an example of a single water-cooled wall cylinder, the water-cooled wall cylinder includes several identical thermosyphon temperature equalization units, each of which is arrayed along the axis of the boiler and surrounds the outer surface of the boiler. In the circumferential direction, the plurality of thermosyphon temperature equalization units just surround one circle of the outer surface of the boiler, and only a slight gap exists between adjacent two thermosyphon temperature equalization units, and the adjacent two thermosyphon temperature equalization units do not need to be sealed, and the influence of the slight gap on the scheme can be ignored. In the vertical direction, two water-cooled wall cylinders surround one circle of the outer surface of the boiler from different heights, and the two water-cooled wall cylinders cover the complete outer surface of the boiler.

[0033] See Figure 4 And Figure 5 The thermosyphon temperature equalization unit includes a heat exchange temperature equalization body 4, which is similar in overall shape to a hollow cuboid type and is surrounded by six plates, and two plates located at opposite positions of the cuboid are the same in shape. The heat exchange temperature equalization body 4 includes: Two strip-shaped arc plates 41, which are arranged in parallel along the radial direction of the boiler. Through actual curved surface curvature design, one of the strip-shaped arc plates 41 is attached to the outer surface of the boiler, and the strip-shaped arc plate 41 not in contact with the outer surface of the boiler is marked as arc plate X, and the strip-shaped arc plate 41 in contact with the outer surface of the boiler is marked as arc plate Y.

[0034] Two side plates 42, which are arranged along the circumferential direction of the boiler. The two side plates 42 are located between and fixedly connected to the two strip-shaped arc plates 41.

[0035] Two bottom plates 43, which are arranged along the axial direction (height direction) of the boiler. The two bottom plates 43 are fixedly connected to the side plates 42 and the strip-shaped arc plates 41 at the same time, and the shape after connection is similar to the aforementioned cuboid type. The joints of the strip-shaped arc plates 41, the side plates 42 and the bottom plates 43 are sealed with high-temperature resistant glue to ensure that a sealed cavity is formed inside the heat exchange temperature equalization body 4.

[0036] The arc plate X is provided with a strip-shaped groove 45, the length direction of the strip-shaped groove 45 is consistent with the height direction of the boiler, and the two ends of the strip-shaped groove 45 respectively extend to the end faces of the upper and lower ends of the arc plate X. In this embodiment, the end faces of the strip-shaped groove 45 are in the shape of a “Fang” character.

[0037] The inner part of the cavity is placed with a liquid absorbing core 44, which is formed by sintering of metal powder (such as copper alloy powder), and the porosity after sintering is 0.5-1 mm. In this embodiment, the end surface shape of the liquid absorbing core 44 after sintering is formed as a "mountain" type structure by cutting as viewed from above, which is used to ensure the light weight while ensuring the contact area, so as to obtain sufficient capillary force to return the working medium, and the inner wall of the cavity is connected in interference (the interference amount is about 1-2 mm), and the structure can increase the contact area with the working medium, and is used to be limited in the container cavity, the upper and lower end surfaces of the liquid absorbing core 44 respectively abut against the two bottom plates 43, and the liquid absorbing core 44 does not fill the cavity, and a space (at least 40% of the volume of the cavity) for adding the working medium is reserved.

[0038] The surface of the arc plate X is provided with a suction hole and is provided with a connecting pipe M, the connecting pipe M is provided with a valve, and the connecting pipe M is provided with a threaded joint. First, the threaded joint is connected with a vacuumizing device (such as a vacuum pump), the inside of the cavity is vacuumized (such as 10 -4 Pa or higher vacuum degree) by using the vacuumizing device, then the valve is closed and the vacuumizing device is removed, and then a liquid injecting device (liquid pump outlet) is installed through the threaded joint, and the liquid naphthalene is injected into the inside of the cavity by using the liquid injecting device. The volume of the liquid naphthalene accounts for about 30% of the volume of the inside of the cavity (the volume of the cavity is known after the heat exchange equalizing body 4 is completed), and the volume is calculated by integrating the time according to the flowmeter. After the liquid naphthalene is injected, the valve on the connecting pipe M is manually closed to ensure the sealing of the cavity.

[0039] See Figure 6 , the thermosyphon equalizing unit further comprises: a thermosyphon 5; the thermosyphon 5 is connected with the aforementioned heat exchange equalizing body 4. Specifically, the thermosyphon 5 further comprises: A connecting pipe 51 is fixedly connected in the strip-shaped groove 45 in a interference connection mode, and the upper and lower ends of the connecting pipe 51 are closed.

[0040] A plurality of short pipes 52, assuming that there are B short pipes 52, one end of the B short pipes 52 is fixedly connected with the side wall of the connecting pipe 51 and communicates with each other.

[0041] Two main pipes 53, the lengths of the two main pipes 53 are not equal, and the upper ends of the two main pipes 53 are closed and the lower ends are open. One end of B1 short pipes 52 is fixedly connected with the side wall of one of the main pipes 53 and communicates with each other, and the other end of B2 short pipes 52 is fixedly connected with the side wall of the other main pipe 53 and communicates with each other. B=B1+B2.

[0042] A heat conducting device 54 (see Figure 7), the end face shape is fan-shaped, and the inside is provided with a cavity. The upper surface (upper end face) of the heat conduction device 54 is provided with two connecting holes 541, the lower ends of the two main pipes 53 are connected with the connecting holes 541 and communicate with the cavity, and the sealing between the main pipe 53 and the connecting hole 541 is ensured by heat-resistant glue. The upper surface of the heat conduction device 54 is also provided with a liquid filling hole and is provided with a connecting pipe N. The connecting pipe N is used in the same way as the aforementioned connecting pipe M. Referring to the use of the aforementioned connecting pipe M, the cavity is first vacuumized by a vacuumizing device, and then liquid naphthalene is filled into the cavity by a liquid filling device. The volume of the liquid naphthalene accounts for about 85% of the volume of the cavity (the volume of the cavity is known after the heat conduction device 54 is completed), and after the filling is completed, the valve on the connecting pipe N is manually closed.

[0043] See Figure 1 From the perspective of a single water wall cylinder, the plurality of thermosyphon temperature equalizing units surrounded by a ring are bound into a whole by connecting assemblies (such as hoops, ring hoops, etc.). In this embodiment, the connecting assemblies include a plurality of annular hoops 6, and the plurality of hoops 6 are distributed vertically. The plurality of hoop units of the hoop 6 are arranged between the gaps of the respective short pipes 52, and adjacent hoop units are locked and connected by bolts to form a complete annular hoop 6, thereby achieving the purpose of binding the plurality of thermosyphon temperature equalizing units.

[0044] See Figure 2 and Figure 3 From the perspective of two water wall cylinders, the heat exchange temperature equalizing bodies 4 of the two water wall cylinders are arranged in a stacked manner from top to bottom, so as to ensure that the vertical surfaces of the two water wall cylinders can cover the complete outer surface of the boiler. The two water wall cylinders do not need to be sealed, and are installed in a circumferentially staggered manner, that is, one of the heat conduction devices 54 in the water wall cylinder A1 is necessarily located between the adjacent two heat conduction devices 54 in the water wall cylinder B2, and for the same reason, one of the heat conduction devices 54 in the water wall cylinder B2 is necessarily located between the adjacent two heat conduction devices 54 in the water wall cylinder A1. Limited by the heat conduction devices 54 of each other, the water wall cylinder A1 and the water wall cylinder B2 cannot rotate relative to each other around the respective axes, which also ensures the stability of the water wall cylinder A1 and the water wall cylinder B2 after being connected and installed together by the hoop 6. In order to achieve the purpose that the heat conduction devices 54 of the upper water wall cylinder A1 and the lower water wall cylinder B2 are located at the same height position, the main pipe 53 of the water wall cylinder A1 located on the upper side is longer than the main pipe 53 of the water wall cylinder B2 located on the lower side (see Figure 2 and Figure 3 schematic view).

[0045] The water wall of the present scheme further comprises a heat storage pool structure 3. The heat storage pool structure 3 comprises: See Figure 8The structure of the heat storage pool body 7 is processed by cutting (such as milling or turning) from top to bottom based on a horizontally placed disc-shaped blank to form a circular pool groove 71 with a specific depth and inner diameter on the disc blank, a ring-shaped plate 72 is installed in the middle of the pool groove 71, the axis of the ring-shaped plate 72 coincides with the axis of the pool groove 71, the ring-shaped plate 72 is sleeved on all the heat conductors 54, and the inner wall of the ring-shaped plate 72 is in contact with all the heat conductors 54 for limiting the water-cooled wall. Solid-liquid phase change material (such as paraffin) is arranged in the entire pool groove 71, the height of the ring-shaped plate 72 is lower than the groove depth of the pool groove 71, so that after the solid-liquid phase change material absorbs heat and becomes liquid, the liquid phase change material can flow in the pool groove 71, the pool groove 71 is provided with a heat exchange pipe 73, the heat exchange pipe 73 is located in the area of the pool groove 71 outside the ring-shaped plate 72, the shape of the heat exchange pipe 73 is non-sealing ring, and the heat exchange pipe 73 is arranged along the inner wall of the pool groove 71, both ends of the heat exchange pipe 73 penetrate out of the pool groove 71, when cold water is connected to the heat exchange pipe 73, the cold water contacts the liquid solid-liquid phase change material and exchanges heat, and the hot water in the heat exchange pipe 73 is connected to other places for use after heat exchange. The heat exchange fins 74 are arranged along the track of the heat exchange pipe 73 for increasing the heat dissipation area. Because the temperature of the heat conductor 54 is 100-210 degrees, the volatilization amount of paraffin in the present scheme is extremely low, so the upper end of the pool groove can not be sealed.

[0046] The use process of the present scheme is as follows: When the water-cooled wall of the boiler works, the arc plate Y is in contact with the outer surface of the boiler, the boiler wall surface transmits heat to the heat exchange uniform temperature body 4, the working medium in the cavity of the heat exchange uniform temperature body 4 evaporates, and the heat is transmitted radially from the inside to the outside, and the heat is transmitted to the hot siphon pipe 5, and the working medium is cooled to a liquid and returns to the bottom of the cavity through the wick 44, and the heat is continuously transmitted through the circulation.

[0047] The heat transmitted to the hot siphon pipe 5 drives the working medium in the pool groove 71 to phase change and circulate in the pipe, and the heat is transmitted to the solid-liquid phase change material, the phase change material melts after absorbing heat, and continuously stores heat, and finally the heat of the boiler is led out through the heat exchange pipe 73 and utilized. Because the liquid medium-solid-liquid phase change material can quickly absorb and store a large amount of heat, the present scheme can meet the requirements of realizing the uniform temperature and cooling of the boiler water-cooled wall, and solve the problem of hot spots of the boiler.

[0048] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and must be determined according to the scope of claims.

Claims

1. A membrane wall for a once-through boiler, characterized in that The application relates to a boiler water cooling wall structure, which comprises two water cooling wall cylinders and a heat storage pool structure (3), wherein the two water cooling wall cylinders are respectively denoted as water cooling wall cylinder A (1) and water cooling wall cylinder B (2), the water cooling wall cylinder A (1) and the water cooling wall cylinder B (2) are of the same structure, and the water cooling wall cylinder is observed from one of the water cooling wall cylinders and comprises a plurality of thermosyphon temperature equalizing units which are arranged along the axis of the boiler and are arranged around and attached to the outer surface of the boiler; in the circumferential direction, the plurality of thermosyphon temperature equalizing units just surround one circle of the outer surface of the boiler, and only a gap is left between two adjacent thermosyphon temperature equalizing units; and the plurality of thermosyphon temperature equalizing units are bound into a whole by connecting assemblies. The thermosyphon temperature equalizing unit comprises: a heat exchange temperature equalizing body (4) in the shape of a hollow cuboid, which is internally provided with a cavity and is in contact with the outer surface of the boiler; a liquid working medium capable of realizing heat exchange is injected into the cavity; and a wick (44) is arranged in the cavity; a thermosyphon pipe (5) connected with the heat exchange temperature equalizing body (4) and in surface contact with the heat exchange temperature equalizing body (4); both open ends of the thermosyphon pipe (5) are connected with a same heat conductor (54), the thermosyphon pipe (5) and the heat conductor (54) form a closed loop, liquid working medium is injected into the heat conductor (54), and the liquid working medium can receive the heat transferred by the heat exchange temperature equalizing body (4) and circulate in the thermosyphon pipe (5) and the heat conductor (54); the heat exchange temperature equalizing bodies (4) of the water cooling wall cylinder A (1) are stacked on the heat exchange temperature equalizing bodies (4) of the water cooling wall cylinder B (2), the heat conductors (54) of the water cooling wall cylinder A (1) and the heat conductors (54) of the water cooling wall cylinder B (2) are at the same height and are arranged in pairs and at intervals, and the heat conductors (54) of the water cooling wall cylinder A (1) and the heat conductors (54) of the water cooling wall cylinder B (2) are arranged in the heat storage pool structure (3), the heat storage pool structure (3) is provided with a solid-liquid phase change material, and the solid-liquid phase change material is liquefied after receiving the heat of the heat conductors (54); the heat storage pool structure (3) is provided with heat exchange pipes (73) for heat exchange with the solid-liquid phase change material in the heat storage pool structure (3), both ends of the heat exchange pipes (73) pass through the heat storage pool structure (3), and the heat exchange pipes (73) are internally provided with liquid.

2. A water wall for a uniform temperature boiler according to claim 1, characterized in that The side surface of the heat exchange temperature equalizing body (4) away from the boiler is provided with a strip-shaped groove (45), and the thermosyphon pipe (5) comprises: a connecting pipe (51) fixedly connected in the strip-shaped groove (45) by interference connection, and the upper and lower ends of the connecting pipe (51) are closed; a plurality of short pipes (52), a total of B short pipes (52) are arranged, one end of the B short pipes (52) is fixedly connected with the side wall of the connecting pipe (51) and is in communication; two main pipes (53), the lengths of the two main pipes (53) are different, and the upper ends of the two main pipes (53) are closed and the lower ends are open; one end of B1 short pipes (52) is fixedly connected with the side wall of one of the main pipes (53) and is in communication, one end of B2 short pipes (52) is fixedly connected with the side wall of the other main pipe (53) and is in communication, and B=B1+B2. The heat-conducting device (54) is internally provided with a cavity, and the upper surface of the heat-conducting device (54) is provided with two connecting holes (541), the lower ends of the two main pipes (53) are respectively connected with the connecting holes (541) and communicate with the cavity, and the heat-conducting device (54) is filled with liquid naphthalene.

3. A water wall for a uniform temperature boiler as defined in claim 2, characterized in that The heat storage pool structure (3) comprises: The heat storage pool main body (7) is based on a horizontally placed disc-shaped blank, and a pool groove (71) is formed through downward cutting processing; The middle part of the pool groove (71) is provided with an annular plate (72), the annular plate (72) is sleeved on all the heat-conducting devices (54), and the inner wall of the annular plate (72) is in contact with all the heat-conducting devices (54); Both ends of the heat exchange pipe (73) pass through the pool groove (71), and the heat exchange pipe (73) is provided with heat exchange fins (74) along its track.

4. A membrane water wall of a uniform temperature boiler according to claim 3, characterized in that The height of the annular plate (72) is lower than the depth of the pool groove (71).

5. A water wall for a uniform temperature boiler as defined in claim 3, characterized in that The connecting assembly is a hoop (6), the hoop units of the hoop (6) pass through the gap between adjacent short pipes (52) and lock adjacent hoop units through bolts; the hoop (6) is provided with a plurality of hoop units in the axial direction of the boiler.

6. A water wall for a uniform temperature boiler as defined in claim 3, wherein The liquid absorbing core (44) is formed by sintering metal powder, the porosity is 0.5-1mm, the liquid absorbing core (44) is formed into a "mountain” shaped structure with a end face shape after sintering and cutting, and is in interference connection with the inner wall of the cavity.

Images