A water-cooled wall assembly

Abstract

The application provides a water-cooled wall combined structure, which comprises a radiation front top ceiling membrane water-cooled wall, a slag dam front top ceiling membrane water-cooled wall, a slag dam membrane water-cooled wall and a radiation rear top ceiling membrane water-cooled wall arranged in sequence along the horizontal direction, and the slag dam membrane water-cooled wall is perpendicular to the slag dam front top ceiling membrane water-cooled wall; a first water circulation assembly is connected to the radiation front top ceiling membrane water-cooled wall; and a second water circulation assembly is connected to the slag dam front top ceiling membrane water-cooled wall and the slag dam membrane water-cooled wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler structure design, in particular to a water-cooled wall combined structure. BACKGROUND

[0002] In non-ferrous pyrometallurgical process system, in addition to lead and zinc, the ore also contains a small amount of halogen such as F and Cl. For various reasons, these impurities are brought into the waste heat boiler in the form of smoke dust in a molten or semi-molten state during the smelting process. The smoke dust has strong adhesion, causing large clinkers on the heating surface of the waste heat boiler, which is difficult to remove and will stick to the membrane water-cooled wall for a long time. Since the clinker contains corrosive components, it will cause corrosion and thinning of the metal layer of the heating surface, and pipe explosion and water leakage accidents will occur frequently after a period of time. Due to the particularity of the structure and the flue gas flow field in the waste heat boiler, the probability of clinker formation at the intersection of the radiation baffle and the membrane wall of the radiation ceiling is particularly high, and it is not easy to fall off. After the waste heat boiler has been operated for a period of time, pipe explosion accidents occur relatively frequently in this area.

[0003] There are generally two ways to handle pipe explosion and water leakage accidents, one is small-scale repair, and the other is to replace the membrane water-cooled wall of the radiation ceiling. If the first way is chosen, since the water leakage port is generally located on the fire-facing surface, the environment in the waste heat boiler furnace is harsh, and the cavity is large. After the furnace is cooled down, a scaffold can be erected for repair, which is very time-consuming and labor-intensive, and seriously affects production safety and efficiency. When the second way is chosen, since the membrane water-cooled wall of the radiation ceiling is arranged from the front to the rear of the furnace, the length of the boiler pipe is more than ten meters, and the overall replacement costs a lot and takes a long time. If part of the membrane wall water-cooled wall is replaced on site, the welding workload is large, the construction period is longer, and the welding conditions on site are poor, so the weld quality is low.

[0004] In summary, in the prior art, the smoke dust generated in the boiler is easy to stick to the membrane water-cooled wall, which makes the membrane water-cooled wall, especially the 180° elbow and the joint between the elbow and the straight pipe, easy to be corroded and damaged. The damaged membrane water-cooled wall is time-consuming and labor-intensive to repair, which seriously affects production safety and efficiency. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a water-cooled wall combined structure to at least solve the problems in the prior art.

[0006] The present application provides a water-cooled wall combined structure, comprising:

[0007] radiation front ceiling membrane water-cooled wall, baffle front ceiling membrane water-cooled wall, baffle membrane water-cooled wall and radiation rear ceiling membrane water-cooled wall arranged in sequence along the horizontal direction, the baffle membrane water-cooled wall being perpendicular to the baffle front ceiling membrane water-cooled wall;

[0008] A first water circulation assembly is connected to the radiant front head membrane water wall;

[0009] A second water circulation assembly is connected to the front head membrane water wall of the slag dam and the membrane water wall of the slag dam;

[0010] The first water circulation assembly is used to cool the radiant front head membrane water wall, and the second water circulation assembly is used to cool the front head membrane water wall of the slag dam and the membrane water wall of the slag dam.

[0011] Compared with the prior art, the beneficial effects of the present application are that the radiant front head membrane water wall, the front head membrane water wall of the slag dam, the membrane water wall of the slag dam, and the radiant rear head membrane water wall are arranged in sequence along the horizontal direction, so that the water wall modules of the water wall combination structure are modularly arranged, the water wall can be individually disassembled and repaired during maintenance, the maintenance efficiency is improved, and the front head membrane water wall of the slag dam and the membrane water wall of the slag dam can be conveniently extracted together, so that the purpose of convenient replacement and maintenance is achieved.

[0012] Further, the first water circulation assembly comprises a head backwater header, a backwater pipeline, a head water supply header, and a water supply pipeline, the head backwater header is connected to the radiant front head membrane water wall through the backwater pipeline, and the head water supply header is connected to the radiant front head membrane water wall through the water supply pipeline.

[0013] Further, the head backwater header and the head water supply header are both columnar, the backwater pipeline and the water supply pipeline are both provided with a plurality of groups, the plurality of groups of backwater pipelines are uniformly connected to the bottom of the head backwater header, and the plurality of groups of water supply pipelines are uniformly connected to the bottom of the head water supply header.

[0014] Further, the second water circulation assembly comprises a slag dam backwater header, a first flow guide part, a slag dam water supply header, and a second flow guide part, the slag dam backwater header is connected to the front head membrane water wall of the slag dam and the membrane water wall of the slag dam through the first flow guide part, and the slag dam water supply header is connected to the front head membrane water wall of the slag dam and the membrane water wall of the slag dam through the second flow guide part.

[0015] Further, the first flow guide part comprises a first backwater pipe and a second backwater pipe, and the slag dam backwater header is connected to the front head membrane water wall of the slag dam and the membrane water wall of the slag dam through the first backwater pipe and the second backwater pipe.

[0016] Further, the second flow guide part comprises a first water supply pipe and a second water supply pipe, the slag baffle water supply header tank is connected with the slag baffle front roof membrane water wall and the slag baffle membrane water wall through the first water supply pipe and the second water supply pipe respectively.

[0017] Further, the top of the slag baffle membrane water wall is higher than the slag baffle front roof membrane water wall and the radiation rear roof membrane water wall.

[0018] Further, the top of the slag baffle membrane water wall is provided with a sealing cover, the sealing cover is in a convex structure, and two ends of the sealing cover are arranged on the slag baffle front roof membrane water wall and the radiation rear roof membrane water wall respectively. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the water wall combined structure in the embodiment of the present application;

[0020] Figure 2 It is a top view of the water wall combined structure in the embodiment of the present application;

[0021] Figure 3 It is a connection structure schematic diagram of the slag baffle water return header tank in the embodiment of the present application;

[0022] Figure 4 It is a connection structure schematic diagram of the slag baffle water supply header tank in the embodiment of the present application;

[0023] Figure 5 It is another connection structure schematic diagram of the slag baffle water return header tank in the embodiment of the present application;

[0024] Figure 6 It is another connection structure schematic diagram of the slag baffle water supply header tank in the embodiment of the present application.

[0025] Explanation of main element symbols:

[0026] 10, radiation front roof membrane water wall;

[0027] 20, slag baffle front roof membrane water wall;

[0028] 30, slag baffle membrane water wall;

[0029] 40, radiation rear roof membrane water wall;

[0030] 50, first water circulation assembly; 51, roof water return header tank; 52, water return pipe; 53, roof water supply header tank; 54, water supply pipe;

[0031] 60. Second water circulation assembly; 61. Slag retaining plate return water header; 62. Slag retaining plate feed water header; 63. First diversion unit; 631. First return water pipe; 632. Second return water pipe; 64. Second diversion unit; 641. First feed water pipe; 642. Second feed water pipe;

[0032] 70. Sealing cover;

[0033] 81. First elbow; 82. Second elbow.

[0034] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] See also Figures 1 to 6 , shown is a water-cooled wall combination structure in an embodiment of the present invention, including a radiation front ceiling membrane water-cooled wall 10, a slag retaining plate front ceiling membrane water-cooled wall 20, a slag retaining plate membrane water-cooled wall 30, a radiation rear ceiling membrane water-cooled wall 40, a first water circulation component 50 and a second water circulation component 60.

[0039] The radiant front ceiling membrane water cooled wall 10, the slag dam front ceiling membrane water cooled wall 20, the slag dam membrane water cooled wall 30 and the radiant rear ceiling membrane water cooled wall 40 are arranged in sequence along the horizontal direction, the slag dam membrane water cooled wall 30 is perpendicular to the slag dam front ceiling membrane water cooled wall 20, the first water circulating assembly 50 is connected to the radiant front ceiling membrane water cooled wall 10, and the second water circulating assembly 60 is connected to the slag dam front ceiling membrane water cooled wall 20 and the slag dam membrane water cooled wall 40.

[0040] It can be understood that, by arranging the radiant front ceiling membrane water cooled wall 10, the slag dam front ceiling membrane water cooled wall 20, the slag dam membrane water cooled wall 30 and the radiant rear ceiling membrane water cooled wall 40 in sequence, the water cooled wall structure is modularly arranged, when the water cooled wall is maintained, only the damaged water cooled wall needs to be disassembled and maintained, so that the maintenance efficiency of the water cooled wall can be effectively improved, and the production efficiency can be avoided from being affected by the long maintenance time, and by making the slag dam membrane water cooled wall 30 perpendicular to the slag dam front ceiling membrane water cooled wall 20, the slag dam membrane water cooled wall 30 can be extracted, so that the purpose of convenient replacement and maintenance is achieved.

[0041] Specifically, the first water circulating assembly 50 includes a ceiling backwater header 51, a backwater pipe 52, a ceiling water supply header 53 and a water supply pipe 54, the ceiling backwater header 51 is connected to the radiant front ceiling membrane water cooled wall 10 through the backwater pipe 51, and the ceiling water supply header 53 is connected to the radiant front ceiling membrane water cooled wall 10 through the water supply pipe 54.

[0042] In specific implementation, the ceiling water supply header 53 is connected to an external water source, the ceiling water supply header 53 flows into the radiant front ceiling membrane water cooled wall 10 through the water supply pipe 54, so as to achieve the purpose of cooling the radiant front ceiling membrane water cooled wall 10, and is recovered to the ceiling backwater header 51 through the backwater pipe 52, and the ceiling backwater header 51 can be connected to an external discharge, so as to achieve the purpose of recovering steam.

[0043] It is worth noting that the ceiling backwater header 51 and the ceiling water supply header 53 are columnarly arranged, the backwater pipe 52 and the water supply pipe 54 are provided with a plurality of groups, the plurality of groups of backwater pipes 52 are uniformly connected to the bottom of the ceiling backwater header 51, and the plurality of groups of water supply pipes 54 are uniformly connected to the bottom of the ceiling water supply header 53.

[0044] Specifically, the second water circulation assembly 60 comprises a slag baffle backwater collecting box 61, a first flow guide part 63, a slag baffle feedwater collecting box 62 and a second flow guide part 64. The slag baffle backwater collecting box 61 is connected to the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 through the first flow guide part 63. The slag baffle feedwater collecting box 62 is connected to the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 through the second flow guide part 64.

[0045] In the specific implementation, the slag baffle feedwater collecting box 62 is connected to an external water source, which is introduced into the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 through the first flow guide part 63. The water source flows in the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 to exchange heat with the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 and the flue gas. The water source flows into the slag baffle backwater collecting box 61 through the second flow guide part 62 to complete the heat exchange and generate steam.

[0046] Specifically, the first flow guide part 63 comprises a first backwater pipe 631 and a second backwater pipe 632. The slag baffle backwater collecting box 61 is connected to the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 through the first backwater pipe 631 and the second backwater pipe 632. The second flow guide part 64 comprises a first feedwater pipe 641 and a second feedwater pipe 642. The slag baffle feedwater collecting box 62 is connected to the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 through the first feedwater pipe 641 and the second feedwater pipe 642.

[0047] It should be explained that in the embodiment, the first backwater pipe 631, the second backwater pipe 632, the first feedwater pipe 641 and the second feedwater pipe 642 are all provided with a plurality of pipes to make the slag baffle front top membrane water wall 20 and the slag baffle membrane water wall 30 be filled with water evenly.

[0048] Further, the front top membrane water wall is provided with a first elbow 81, and the slag baffle front top membrane water wall 20 is provided with a second elbow 82. The first elbow 81 and the second elbow 82 are both 180° elbows.

[0049] It should be explained that in the prior art, elbows need to be arranged in the boiler membrane water wall, and the elbows need to be welded with straight pipes. However, because the elbows are thinned during the processing, the elbows are more easily corroded and damaged than the straight pipes. Specifically, as shown in Figure 2As shown, in the embodiment, the first elbow 81 and the second elbow 82 are both 180° elbows, which are determined by the processing technology, and a complete loop cannot be formed by one boiler pipe. A membrane wall is composed of multiple loops, and the pipes are sealed by steel plates. Finally, a membrane water cooling wall is formed, and the straight pipe and the flat steel are welded to form a continuous channel after the welding is completed, that is, a loop. In the embodiment, the second elbow 82 is arranged on both sides of the boiler, and the straight pipe section is located in the middle, so that the elbows and the welds between the elbows and the straight pipes which are easily bonded with slag corrosion are avoided, thereby effectively prolonging the service life of the membrane water cooling wall. Moreover, the slag baffle membrane water cooling wall 30 and the slag baffle front roof membrane water cooling wall 20 are modularly arranged, so that the slag baffle membrane water cooling wall 30 and the slag baffle front roof membrane water cooling wall 20 can be disassembled for maintenance.

[0050] Specifically, the top of the slag baffle membrane water cooling wall 30 is provided with a sealing cover 70, the sealing cover 70 is in a convex structure, and the two ends of the sealing cover 70 are arranged on the slag baffle front roof membrane water cooling wall 20 and the radiation rear roof membrane water cooling wall 40 respectively.

[0051] It can be understood that, in order to facilitate installation, an appropriate gap needs to be left between the slag baffle front roof membrane water cooling wall 20 and the radiation rear roof membrane water cooling wall 40, and the gap is sealed by the sealing cover 70.

[0052] In summary, the water cooling wall combined structure in the above embodiment is modularly arranged by the radiation front roof membrane water cooling wall 10, the slag baffle front roof membrane water cooling wall 20, the slag baffle membrane water cooling wall 30 and the radiation rear roof membrane water cooling wall 40 arranged in sequence along the horizontal direction. When the water cooling wall is maintained, the water cooling wall can be disassembled and maintained individually, the maintenance efficiency is improved, the modularly arranged water cooling wall can facilitate the slag baffle front roof membrane water cooling wall 20 and the slag baffle membrane water cooling wall 30 to be extracted together, and the purpose of convenient replacement and maintenance is achieved.

[0053] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A water-cooled wall assembly structure, characterized in that: include: The radiation front ceiling membrane water-cooled wall, the slag retaining plate front ceiling membrane water-cooled wall, the slag retaining plate membrane water-cooled wall and the radiation rear ceiling membrane water-cooled wall are arranged in sequence in the horizontal direction, and the slag retaining plate membrane water-cooled wall is perpendicular to the slag retaining plate front ceiling membrane water-cooled wall; A first water circulation component is connected to the radiation front ceiling membrane water-cooled wall; A second water circulation component is connected to the membrane water-cooled wall on the front ceiling of the slag retaining plate and the membrane water-cooled wall of the slag retaining plate; The first water circulation component is used to cool the radiation front ceiling membrane water-cooled wall, and the second water circulation component is used to cool the slag retaining plate front ceiling membrane water-cooled wall and the slag retaining plate membrane water-cooled wall.

2. The water-cooled wall assembly structure according to claim 1, characterized in that: The first water circulation component includes a ceiling return water header, a return water pipe, a ceiling supply water header and a supply water pipe. The ceiling return water header is connected to the radiation front ceiling membrane water-cooled wall through the return water pipe, and the ceiling supply water header is connected to the radiation front ceiling membrane water-cooled wall through the supply water pipe.

3. The water-cooled wall assembly structure according to claim 2, characterized in that: The ceiling return water collection tank and the ceiling water supply collection tank are both columnarly arranged, and the return water pipes and the water supply pipes are each provided with several groups, several groups of the return water pipes are evenly connected to the bottom of the ceiling return water collection tank, and several groups of the water supply pipes are evenly connected to the bottom of the ceiling water supply collection tank.

4. The water-cooled wall assembly structure according to claim 1, characterized in that: The second water circulation component includes a slag baffle return water header, a first guide part, a slag baffle feed water header and a second guide part. The slag baffle return water header is connected to the slag baffle front ceiling membrane water-cooled wall and the slag baffle membrane water-cooled wall through the first guide part, and the slag baffle feed water header is connected to the slag baffle front ceiling membrane water-cooled wall and the slag baffle membrane water-cooled wall through the second guide part.

5. The water-cooled wall assembly structure according to claim 4, characterized in that: The first guide portion includes a first return water pipe and a second return water pipe, and the slag baffle return water header is connected to the slag baffle front ceiling membrane water-cooled wall and the slag baffle membrane water-cooled wall through the first return water pipe and the second return water pipe respectively.

6. The water-cooled wall assembly structure according to claim 4, characterized in that: The second guide portion includes a first water supply pipe and a second water supply pipe, and the slag baffle water supply header is connected to the slag baffle front ceiling membrane water-cooled wall and the slag baffle membrane water-cooled wall through the first water supply pipe and the second water supply pipe respectively.

7. The water-cooled wall assembly structure according to claim 1, characterized in that: The top of the slag baffle membrane water-cooled wall is higher than the slag baffle front ceiling membrane water-cooled wall and the radiation rear ceiling membrane water-cooled wall.

8. The water-cooled wall assembly structure according to claim 1, characterized in that: A sealing cover is provided on the top of the slag baffle membrane water-cooled wall. The sealing cover is a convex structure. The two ends of the sealing cover are respectively arranged on the slag baffle front ceiling membrane water-cooled wall and the radiation rear ceiling membrane water-cooled wall.

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