Split type converter flue gas waste heat boiler flue

Abstract

The utility model discloses a split type flue of a converter flue gas waste heat boiler, belongs to the technical field of boilers, and solves the problems that an existing flue of the flue gas waste heat boiler is large in size and inconvenient to disassemble, assemble and maintain. The utility model relates to a split type heat exchanger which comprises an upper header group and a lower header group which are arranged in a split mode, the lower header group is composed of two half-and-half lower header pieces, independent heated pipes are arranged on the inner walls of the upper header pieces and the lower header pieces, a collecting pipe is arranged on the upper header group, and the heated pipes are communicated with the collecting pipe. The two upper header pieces, the two lower header pieces, the upper header set and the lower header set are detachably connected to form the boiler flue, and the heated pipes corresponding to the upper header pieces are communicated with the heated pipes corresponding to the lower header pieces. The boiler flue is convenient to transport and hoist, the construction efficiency is effectively improved, heated pipes do not need to be sequentially replaced from bottom to top, and the win-win purpose of eliminating hidden danger of equipment and saving maintenance time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and more specifically, to a split converter flue gas waste heat boiler flue. Background Art

[0002] Boilers are widely used in industrial and civil fields and are important devices for converting thermal energy into kinetic energy. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and has a small number of applications in industrial production. A boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises. In the iron and steel metallurgical industry, a large amount of high-temperature flue gas will be generated during the removal of molten metal impurities in the converter. This part of the heat energy in the flue gas is called waste heat, and the boiler that uses waste heat for energy conversion is called a converter waste heat boiler. Due to the periodicity of metal smelting in the converter, the flue gas temperature changes periodically in the range of 50℃ to 1500℃, resulting in poor working conditions of the waste heat boiler and a short service life. After a certain period of time, the waste heat boiler must be replaced as a whole.

[0003] Taking a converter with a nominal capacity of 120t as an example, the boiler consists of 4 sets of independent heating flues. The diameter of a single set of heating flues is up to 4 meters and the length is more than 10 meters. The purpose is to absorb enough heat to drive the water circulation in the heating tubes of the flue using the density difference between water and steam to avoid overburning and damage of the heating tubes. Due to the limitations of the plant structure, the heating tubes of each group can only be replaced from bottom to top. Regardless of whether the heating tubes below need to be replaced, they all need to be removed. The entire construction period caused the company to stop production for more than 15 days, which had a serious impact on the company's production.

[0004] Therefore, it is urgent to design a split converter flue gas waste heat boiler flue to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a split converter flue gas waste heat boiler flue for the above-mentioned deficiencies in the prior art, which is convenient for transportation and hoisting, effectively improves construction efficiency, and does not require the heating tubes to be replaced sequentially from bottom to top, thereby achieving a win-win goal of eliminating equipment hidden dangers and saving maintenance time.

[0006] The technical solution of the utility model is as follows: a split converter flue gas waste heat boiler flue, comprising an upper header group and a lower header group arranged in a split manner, the upper header group is composed of two upper header pieces arranged in half, the lower header group is composed of two lower header pieces arranged in half, the inner walls of the upper header pieces and the lower header pieces are both provided with independent heat-receiving pipes, the upper header group is provided with a collecting pipe, and the heat-receiving pipes are all connected with the collecting pipe; the two upper header pieces, the two lower header pieces, and the upper header group and the lower header group are detachably connected to form the boiler flue, and the heat-receiving pipes corresponding to the upper header pieces are connected with the heat-receiving pipes corresponding to the lower header pieces.

[0007] As a further improvement, connecting plates are provided at the openings of the two upper header plates, the openings of the two lower header plates, and one end of the upper header group and the lower header group, and the connecting plates between the two upper header plates, between the two lower header plates, and between the upper header group and the lower header group are connected by fastening bolts.

[0008] Furthermore, the lower header assembly is provided with a plurality of scaffolding installation holes.

[0009] Furthermore, a flue hoop is provided on the upper header assembly.

[0010] Furthermore, the upper header group and the lower header group are both provided with a plurality of reinforcement rings.

[0011] Furthermore, support frames are provided in the upper header piece and the lower header piece.

[0012] Furthermore, a manhole cover is provided on one side of the upper header assembly.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The flue of the flue gas waste heat boiler of the utility model reduces the size of the components by dividing a single group of flues into four independent assembly units. The size meets the hoisting space of the on-site factory building, and the weight is reduced from 20 tons / piece to 5-10 tons / piece, which is convenient for transportation and hoisting, and effectively improves the construction efficiency. At the same time, when the replacement and maintenance officially begins, the single group of heated tubes that need to be replaced is horizontally dismantled, and there is no need to replace the heated tubes from bottom to top in sequence, and then the new heated tube group is reinstalled horizontally, so as to achieve the win-win goal of eliminating equipment hidden dangers and saving maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a side view structural schematic diagram of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of the structure of the upper header group in the utility model;

[0019] Figure 4 It is an enlarged schematic diagram of the structure of the upper header piece in the utility model;

[0020] Figure 5 It is an enlarged schematic diagram of the structure of the middle and lower header group of the utility model;

[0021] Figure 6 It is an enlarged schematic diagram of the structure of the lower header piece in the utility model.

[0022] Among them: 1-upper header group, 2-lower header group, 3-upper header plate, 4-lower header plate, 5-heating pipe, 6-collecting pipe, 7-connecting plate, 8-fastening bolt, 9-scaffolding installation hole, 10-flue hoop, 11-reinforcement ring, 12-support frame, 13-manhole cover. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See also Figure 1-6 The utility model discloses a split converter flue gas waste heat boiler flue, comprising an upper header group 1 and a lower header group 2 arranged in a split manner, wherein the upper header group 1 is composed of two upper header pieces 3 arranged in half, and the lower header group 2 is composed of two lower header pieces 4 arranged in half, that is, the flue is divided into four pieces, and independent heat-receiving pipes 5 are arranged on the inner walls of the upper header piece 3 and the lower header piece 4, that is, the four flues each correspond to a set of independent heat-receiving pipes 5, which are convenient for independent replacement, and a collecting pipe 6 is arranged on the upper header group 1, and the heat-receiving pipes 5 are all connected with the collecting pipe 6, so that the circulating water in the heat-receiving pipes is conveniently collected into the collecting pipe 6; the two upper header pieces 3, the two lower header pieces 4, and the upper header group 1 and the lower header group 2 can be detachably connected to form a boiler flue, and the heat-receiving pipes 5 corresponding to the upper header piece 3 are connected with the heat-receiving pipes 5 corresponding to the lower header piece 4, so as to realize the connection of the circulating water circuit.

[0025] The flue of the flue gas waste heat boiler of the utility model reduces the size of the components by dividing a single group of flues into four independent assembly units. The size meets the hoisting space of the on-site factory building, and the weight is reduced from 20 tons / piece to 5-10 tons / piece, which is convenient for transportation and hoisting, and effectively improves the construction efficiency. At the same time, when the replacement and maintenance officially begins, the single group of heated tubes that need to be replaced is horizontally dismantled, and there is no need to replace the heated tubes from bottom to top in sequence, and then the new heated tube group is reinstalled horizontally, so as to achieve the win-win goal of eliminating equipment hidden dangers and saving maintenance time.

[0026] Preferably, the openings of the two upper tank pieces 3, the openings of the two lower tank pieces 4, and one end of the upper tank group 1 and the lower tank group 2 are all provided with connecting plates 7, and the connecting plates 7 between the two upper tank pieces 3, between the two lower tank pieces 4, and between the upper tank group 1 and the lower tank group 2 are all connected by fastening bolts 8. The two upper tank pieces 3, the two lower tank pieces 4, and the upper tank group 1 and the lower tank group 2 are connected by fastening bolts 8 to achieve detachable installation connection, which is convenient for disassembly and maintenance. Furthermore, sealing gaskets can be provided on the butt surfaces between the two upper tank pieces 3, the two lower tank pieces 4, and the upper tank group 1 and the lower tank group 2 to improve the sealing. In other embodiments, the two upper tank pieces 3, the two lower tank pieces 4, and the upper tank group 1 and the lower tank group 2 can also be connected by welding and fixing, and oxygen gun cutting and destruction are required when replacing.

[0027] Preferably, a plurality of scaffolding holes 9 are provided on the lower header group 2 to facilitate the scaffolding and facilitate the workers to go up to the flue for inspection. Further, a flue hoist 10 is provided on the upper header group 1 to facilitate the installation of the flue.

[0028] Preferably, a plurality of reinforcing rings 11 are provided on both the upper header assembly 1 and the lower header assembly 2 to enhance the connection reliability between the two upper header pieces 3 and the two lower header pieces 4 .

[0029] Preferably, a support frame 12 is provided in the upper and lower tank pieces 3, 4. The support frame 12 is composed of a center rod and a plurality of connecting rods. The plurality of connecting rods connect the center rod and the upper and lower tank pieces 3, 4 to form support for the inner walls of the upper and lower tank pieces 3, 4 to prevent the deformation of the upper and lower tank pieces 3, 4, resulting in difficulty in docking.

[0030] Preferably, a manhole cover 13 is provided on one side of the upper header assembly 1 to facilitate maintenance by the staff.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A split converter flue gas waste heat boiler flue, characterized in that: The invention comprises an upper header group (1) and a lower header group (2) which are arranged in a split manner, wherein the upper header group (1) is composed of two upper header plates (3) arranged in half, and the lower header group (2) is composed of two lower header plates (4) arranged in half, and the inner walls of the upper header plates (3) and the lower header plates (4) are both provided with independent heat-receiving pipes (5), and the upper header group (1) is provided with a collecting pipe (6), and the heat-receiving pipes (5) are all connected to the collecting pipe (6); the two upper header plates (3), the two lower header plates (4), and the upper header group (1) and the lower header group (2) are detachably connected to form the boiler flue, and the heat-receiving pipes (5) corresponding to the upper header plates (3) are connected to the heat-receiving pipes (5) corresponding to the lower header plates (4).

2. The split converter flue gas waste heat boiler flue according to claim 1, characterized in that: The openings of the two upper header pieces (3), the openings of the two lower header pieces (4) and one end of the upper header group (1) and the lower header group (2) are all provided with connecting plates (7); the connecting plates (7) between the two upper header pieces (3), between the two lower header pieces (4) and between the upper header group (1) and the lower header group (2) are all connected by fastening bolts (8).

3. The split converter flue gas waste heat boiler flue according to claim 1, characterized in that: The lower header group (2) is provided with a plurality of scaffolding installation holes (9).

4. The split converter flue gas waste heat boiler flue according to claim 1, characterized in that: The upper header assembly (1) is provided with a flue hoop (10).

5. The split converter flue gas waste heat boiler flue according to claim 1, characterized in that: The upper header group (1) and the lower header group (2) are both provided with a plurality of reinforcement rings (11).

6. The split converter flue gas waste heat boiler flue according to claim 1, characterized in that: The upper header piece (3) and the lower header piece (4) are both provided with a support frame (12).

7. A split converter flue gas waste heat boiler flue according to any one of claims 1 to 6, characterized in that: A manhole cover (13) is provided on one side of the upper header assembly (1).

Images