Flame resistant energy absorber

Abstract

The utility model relates to the technical field of metallurgical industry especially is concerned with a kind of flame-retardant energy absorber, it includes the shell of tubulose, annular upper header is equipped with in shell top outside, annular lower header is equipped with in shell bottom outside, multiple water collecting pipes are provided in upper header, water collecting pipe both ends are connected with upper header, multiple water distributing pipes are provided in lower header, water distributing pipe both ends are connected with lower header, multiple quick cooling pipes are evenly installed in shell along the axial direction, flow passage is provided in the pipe wall of quick cooling pipe, quick cooling pipe top end is connected with water collecting pipe, quick cooling pipe bottom end is connected with water distributing pipe.High-temperature coal gas flows into the multiple quick cooling pipes of flame-retardant energy absorber from flue, and it is prevented that gas burns by quick cooling pipe rapid cooling and wall effect;The flame-retardant energy absorber can carry out heat recovery to high-temperature coal gas, and water resource can also be recycled, solve the drawbacks of existing converter gas purification, and it has great significance to the development of steel industry.

Description

Technical Field

[0001] This utility model relates to the technical field of metallurgical industry, and in particular to a flame-retardant energy absorber. Background Technology

[0002] Converter gas is a byproduct of the converter steelmaking process, mainly composed of CO and CO2. Its calorific value is approximately twice that of blast furnace gas. It can be used as a feedstock to produce high-value-added chemical products, or directly used in steelmaking or as fuel. The explosive range of a converter gas mixture with air is 17-75%, and its ignition point is approximately 650-700℃. Converter gas at temperatures around 650-700℃ must be protected against flame retardancy and explosion.

[0003] The three elements of combustion are combustible material, oxidizer, and the heat required for combustion. Blocking any one of these elements will halt the combustion process. Currently, converter gas purification and recovery systems use OG wet and LT dry systems, employing direct water cooling in the 650-700℃ temperature range to achieve safe flue gas temperatures. However, this process wastes water resources and prevents the recovery of thermal energy. Utility Model Content

[0004] In order to recover the heat of high-temperature flue gas while being flame-retardant and explosion-proof, and to solve the problem of energy and resource waste, this utility model provides a flame-retardant energy absorber.

[0005] The flame-retardant energy absorber provided by this utility model adopts the following technical solution:

[0006] A flame-retardant energy absorber includes a tubular housing, an annular upper manifold fitted on the outer side of the top of the housing, and an annular lower manifold fitted on the outer side of the bottom of the housing. Multiple water collection pipes are arranged side by side inside the upper manifold, and both ends of the water collection pipes are connected to the upper manifold. Multiple water distribution pipes are arranged side by side inside the lower manifold, and both ends of the water distribution pipes are connected to the lower manifold. Multiple rapid cooling pipes are evenly installed axially inside the housing. Water flow channels are provided in the pipe walls of the rapid cooling pipes. The top end of the rapid cooling pipe is connected to the water collection pipe, and the bottom end of the rapid cooling pipe is connected to the water distribution pipe.

[0007] By adopting the above technical solution, converter gas at a temperature of approximately 750℃ flows into the flame-retardant energy absorber through the flue. The gas then flows into multiple rapid cooling pipes, where it is rapidly cooled from 750℃ to 550℃ after being diverted, thus achieving rapid cooling and preventing combustion. Due to the small diameter of the rapid cooling pipes, when the gas burns at this point, the rapid cooling and the wall effect prevent combustion. Heat recovery from the high-temperature gas is possible during cooling, and water resources can be reused. This flame-retardant energy absorber has a reasonable structure and stable operation, solving the shortcomings of existing converter gas purification methods. It has high practical and economic value and is of great significance to the development of the steel industry, energy conservation and carbon reduction, and the achievement of dual-carbon goals.

[0008] Optionally, the rapid cooling pipe includes a cooling pipe membrane wall, with an annular upper cooling pipe manifold connected to the top of the cooling pipe membrane wall and an annular lower cooling pipe manifold connected to the bottom of the cooling pipe membrane wall. The upper cooling pipe manifold is connected to the water collection pipe via an upper connecting pipe, and the lower cooling pipe manifold is connected to the water distribution pipe via a lower connecting pipe.

[0009] By adopting the above technical solution, the membrane wall of the cooling pipe can serve as the pipe wall of the rapid cooling pipe to seal the gas, and can also serve as a water flow channel for heat exchange.

[0010] Optionally, a support plate is horizontally fixed to the inner wall of the top of the housing, and the cooling pipe membrane wall is inserted through and fixed to the support plate.

[0011] By adopting the above technical solution, the rapid cooling pipe is suspended on the support plate, allowing deformation of the rapid cooling pipe due to large temperature differences.

[0012] Optionally, a cooling pipe flange is fitted and fixed to the outer side of the top of the cooling pipe membrane wall, and the cooling pipe flange is bolted to the support plate.

[0013] By adopting the above technical solution, the rapid cooling pipe is fixed to the support plate by the cooling pipe flange bolts, making it individually detachable and convenient for inspection and maintenance.

[0014] Optionally, the upper connecting pipe and / or the lower connecting pipe may be curved.

[0015] By adopting the above technical solution, the upper and lower connecting pipes are curved, and the axial deformation of the cooling pipe film wall caused by the large temperature difference is basically unrestrained, so as to ensure its normal use under different temperature conditions.

[0016] Optionally, an inlet guide is installed at the top of the housing, with the inlet extending into the top of the rapid cooling pipe, and an outlet guide is installed at the bottom of the housing, with the outlet extending into the bottom of the rapid cooling pipe.

[0017] By adopting the above technical solution, the inlet guide and outlet guide have the effect of guiding the flow of coal gas, and the inlet guide can divide the large flow of coal gas into a small flow of coal gas so that it can be evenly entered into multiple rapid cooling pipes.

[0018] Optionally, the housing includes a steel pipe with a densely packed tube bundle fixed to the outside of the steel pipe. The top end of the densely packed tube bundle is connected to the upper header, and the bottom end of the densely packed tube bundle is connected to the lower header.

[0019] By adopting the above technical solution, the shell is composed of steel pipes and densely packed tube bundles. When the internal rapid cooling pipes leak, they can play a sealing role to prevent gas from overflowing. Water is transported from the lower header to the upper header in the external densely packed tube bundles, which plays a cooling role and further ensures the safety of the flame-retardant energy absorber.

[0020] Optionally, both the upper and lower headers can be connected to an external steam drum.

[0021] By adopting the above technical solution, saturated steam is generated through steam-water separation in the steam drum, thereby realizing the recovery of heat from high-temperature flue gas. Attached Figure Description

[0022] Figure 1 This is a front cross-sectional view of the flame-retardant energy absorber according to an embodiment of the present invention.

[0023] Figure 2 yes Figure 1 An enlarged schematic diagram of the upper right part of the flame-retardant energy absorber.

[0024] Figure 3 This is a top cross-sectional view of the flame-retardant energy absorber according to an embodiment of the present invention.

[0025] Figure 4 yes Figure 1 A schematic diagram of the structure of the medium-speed cooling pipe.

[0026] Figure 5 yes Figure 4 Sectional view along the AA direction.

[0027] Explanation of reference numerals in the attached drawings: 1. Shell; 10. Steel pipe; 11. Closely packed tube bundle; 2. Support plate; 3. Rapid cooling pipe; 30. Cooling pipe membrane wall; 31. Upper cooling pipe header; 32. Lower cooling pipe header; 33. Cooling pipe flange; 34. Upper connecting pipe; 35. Lower connecting pipe; 4. Upper header; 5. Lower header; 6. Water collection pipe; 7. Water distribution pipe; 8. Inlet guide; 9. Outlet guide. Detailed Implementation

[0028] The following combination Figures 1-5 The present invention will be described in further detail below.

[0029] This utility model discloses a flame-retardant energy absorber. (Refer to...) Figures 1-5 The flame-retardant energy absorber includes a housing 1, which includes a vertically arranged steel pipe 10 and a densely packed tube bundle 11 that is fixed around the outer periphery of the steel pipe 10; a horizontally arranged support plate 2 is fixed to the inner wall of the top of the steel pipe 10; and multiple vertically suspended rapid cooling tubes 3 are evenly inserted through the support plate 2.

[0030] The rapid cooling pipe 3 includes a cooling pipe membrane wall 30, with an annular upper cooling pipe header 31 connected to the top of the cooling pipe membrane wall 30 and an annular lower cooling pipe header 32 connected to the bottom of the cooling pipe membrane wall 30; a cooling pipe flange 33 is fitted and fixed on the top outer wall of the cooling pipe membrane wall 30, the cooling pipe membrane wall 30 passes through the support plate 2, and the cooling pipe flange 33 is mounted on the top surface of the support plate 2 and bolted to the support plate 2.

[0031] An annular upper manifold 4 is fitted on the outer side of the top of the housing 1, and an annular lower manifold 5 is fitted on the outer side of the bottom of the housing 1. The densely packed pipe bundle 11 is connected to the upper manifold 4 and the lower manifold 5 respectively. Multiple water collection pipes 6 are arranged side by side in the upper manifold 4, and both ends of the water collection pipes 6 are connected to the upper manifold 4. The upper manifold 31 of the cooling pipe is connected to the water collection pipes 6 through the upper connecting pipe 34. Multiple water distribution pipes 7 are arranged side by side in the lower manifold 5, and both ends of the water distribution pipes 7 are connected to the lower manifold 5. The lower manifold 32 of the cooling pipe is connected to the lower manifold 5 through the lower connecting pipe 35.

[0032] Both the upper connecting pipe 34 and the lower connecting pipe 35 are curved; an inlet guide 8 for guiding coal gas into the rapid cooling pipe 3 is fixedly connected to the inner wall of the top of the steel pipe 10, and the guide hole of the inlet guide 8 extends into the top of the rapid cooling pipe 3, and the inlet guide 8 divides the large flow of coal gas into a small flow of coal gas; an outlet guide 9 for guiding coal gas out of the rapid cooling pipe 3 is fixedly connected to the inner wall of the bottom of the steel pipe 10, and the guide hole of the outlet guide 9 extends into the bottom of the rapid cooling pipe 3.

[0033] The implementation principle of the flame-retardant energy absorber in this embodiment of the utility model is as follows: Converter gas at a temperature of about 750°C flows into the flame-retardant energy absorber through the flue. The gas is guided into multiple rapid cooling pipes 3 through the inlet guide 8. After the gas is diverted, it is rapidly cooled in the rapid cooling pipes 3, from 750°C to 550°C, which plays a role in rapid cooling and prevents the gas from burning. Because the diameter of the rapid cooling pipes 3 is small, when the gas burns here, the rapid cooling of the rapid cooling pipes 3 and the wall effect prevent the gas from burning.

[0034] The rapid cooling pipe 3 is a pipe-membrane wall structure. Water output from the steam drum passes through the lower header 5, water distribution pipe 7, lower connecting pipe 35, lower cooling pipe header 32, cooling pipe membrane wall 30, upper cooling pipe header 31, upper connecting pipe 34, water collection pipe 6, and upper header 4 before re-entering the steam drum. During this process, the heat in the gas is transferred to the water. After absorbing heat, the water undergoes steam-water separation in the steam drum to generate saturated steam for industrial production.

[0035] The rapid cooling pipe 3 is designed according to the explosion pressure of coal gas, ensuring structural stability when coal gas burns inside the rapid cooling pipe 3; the rapid cooling pipe 3 is bolted to the support plate 2 through the cooling pipe flange 33, making it individually detachable and convenient for inspection and maintenance; the rapid cooling pipe 3 is hoisted on the support plate 2, and the upper connecting pipe 34 and the lower connecting pipe 35 are curved, so the axial deformation of the cooling pipe membrane wall 30 caused by the large temperature difference is basically unrestrained, so as to ensure its normal use under different temperature conditions.

[0036] The shell 1 is composed of steel pipe 10 and densely packed pipe bundle 11. When the internal rapid cooling pipe 3 leaks, it can play a sealing role to prevent gas from overflowing. Water is transported from the lower header 5 to the upper header 4 in the external densely packed pipe bundle 11, which plays a cooling role and further ensures the safety of the flame-retardant energy absorber.

[0037] When the flue gas passes through the flame-retardant energy absorber, the flame-retardant energy absorber absorbs a large amount of heat. Even if there are both combustible and combustion-supporting factors, the heat is insufficient, so the combustible cannot reach the temperature required for combustion. The combustion process cannot continue and can only be terminated. That is, the cooling effect causes a sudden increase in heat loss, which stops the combustion and plays an effective role in flame retardancy and explosion prevention.

[0038] While cooling high-temperature coal gas, it can also recover the heat of the high-temperature coal gas and convert it into saturated steam through an external steam drum, thus playing an energy recovery role and avoiding water waste. The flame-retardant energy absorber has a reasonable structure and stable operation, which solves the shortcomings of existing converter gas purification. It has high practical and economic value and is of great significance to the development of the steel industry, energy conservation and carbon reduction, and the achievement of dual carbon goals.

[0039] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A flame-retardant energy absorber, characterized in that: The device includes a tubular shell (1), an annular upper manifold (4) on the outer side of the top of the shell (1), an annular lower manifold (5) on the outer side of the bottom of the shell (1), multiple water collection pipes (6) arranged side by side in the upper manifold (4), the two ends of the water collection pipes (6) being connected to the upper manifold (4), multiple water distribution pipes (7) arranged side by side in the lower manifold (5), the two ends of the water distribution pipes (7) being connected to the lower manifold (5), multiple rapid cooling pipes (3) uniformly installed axially in the shell (1), water flow channels are provided in the pipe wall of the rapid cooling pipes (3), the top end of the rapid cooling pipes (3) is connected to the water collection pipes (6), and the bottom end of the rapid cooling pipes (3) is connected to the water distribution pipes (7).

2. The flame-retardant energy absorber according to claim 1, characterized in that: The rapid cooling pipe (3) includes a cooling pipe membrane wall (30), the top of which is connected to an annular upper cooling pipe manifold (31), and the bottom of which is connected to an annular lower cooling pipe manifold (32). The upper cooling pipe manifold (31) is connected to the water collection pipe (6) through an upper connecting pipe (34), and the lower cooling pipe manifold (32) is connected to the water distribution pipe (7) through a lower connecting pipe (35).

3. The flame-retardant energy absorber according to claim 2, characterized in that: A support plate (2) is horizontally fixed to the inner wall of the top of the shell (1), and a cooling pipe membrane wall (30) is inserted through and fixed to the support plate (2).

4. The flame-retardant energy absorber according to claim 3, characterized in that: A cooling pipe flange (33) is fitted and fixed on the outer side of the top of the cooling pipe membrane wall (30), and the cooling pipe flange (33) is bolted to the support plate (2).

5. The flame-retardant energy absorber according to any one of claims 2-4, characterized in that: The upper connecting pipe (34) and / or the lower connecting pipe (35) are curved.

6. The flame-retardant energy absorber according to claim 1, characterized in that: An inlet guide (8) is installed on the top of the housing (1), and the guide port of the inlet guide (8) extends into the top of the rapid cooling pipe (3). An outlet guide (9) is installed on the bottom of the housing (1), and the guide port of the outlet guide (9) extends into the bottom of the rapid cooling pipe (3).

7. The flame-retardant energy absorber according to claim 1, characterized in that: The shell (1) includes a steel pipe (10), and a densely packed tube bundle (11) is fixed to the outside of the steel pipe (10). The top end of the densely packed tube bundle (11) is connected to the upper header (4), and the bottom end of the densely packed tube bundle (11) is connected to the lower header (5).

8. The flame-retardant energy absorber according to claim 1, characterized in that: Both the upper header (4) and the lower header (5) are connected to the external steam drum.

Images