Emergency treatment cooling device for smelting flue gas

Abstract

The utility model discloses a smelting flue gas emergency treatment cooling device which comprises a spray tower body, the spray tower body comprises a spray tower smoke inlet section, a spray tower cooling section and a spray tower smoke discharge section which are sequentially connected from bottom to top, and all the sections are fixedly connected through flange structures; a smoke inlet is formed in the side wall of the smoke inlet section of the spray tower, and is connected with a furnace exhaust flue port; a smoke exhaust port is formed in the side wall of the smoke exhaust section of the spray tower and is connected with a smoke treatment system; the spray tower is of a steel water jacket structure, and each section is provided with a cooling water inlet, a cooling water channel and a cooling water return port; a plurality of cooling spray guns are arranged in the spray tower cooling section and are distributed in an upper layer and a lower layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgy, and in particular relates to a smelting fume emergency treatment cooling device. Background Art

[0002] Smelting furnaces are equipped with waste heat recovery devices during the production process. In order to realize the heat recovery and reuse of high-temperature smelting flue gas, waste heat boilers and dust collection devices are generally configured to cool down and collect dust. When the waste heat boilers and dust collection devices fail, and the metallurgical furnaces need to be kept warm or urgently overhauled in hot state, the environmental protection flue gas of the furnaces will escape due to the negative pressure in the furnaces, affecting the environment. At the same time, the flue gas temperature of the metallurgical furnaces in the hot shutdown state is about 800℃.

[0003] The environmental dust collection system is generally a bag dust collector or an ionic liquid dust collector, which has high requirements for the flue gas temperature. Generally, the temperature must not be higher than 200°C. The high-temperature environmental flue gas from metallurgical furnaces cannot directly enter the environmental dust collection system. Therefore, a flue gas cooling device needs to be installed. The cooled flue gas can enter the environmental flue gas treatment system. Utility Model Content

[0004] The utility model provides a cooling device for emergency disposal of smelting flue gas. The purpose is to cool the high-temperature flue gas to about 150°C by designing and installing an emergency insulation device spray tower for smelting flue gas according to actual on-site needs, and then discharge it into an environmental protection dust collection system for treatment, so that the flue gas temperature meets the working requirements of the environmental protection dust collection system.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A smelting flue gas emergency treatment and cooling device comprises a spray tower body, the spray tower body comprises a spray tower smoke inlet section, a spray tower cooling section and a spray tower smoke exhaust section which are connected in sequence from bottom to top, and each section is fixedly connected by a flange structure; a smoke inlet is arranged on the side wall of the spray tower smoke inlet section, and the smoke inlet is connected to the flue outlet of the kiln; a smoke exhaust port is arranged on the side wall of the spray tower smoke exhaust section, and the smoke exhaust port is connected to a smoke treatment system;

[0007] The spray tower is a steel water jacket structure, each section is provided with a cooling water inlet, cooling water channel and cooling water return port; a number of cooling spray guns are arranged in the cooling section of the spray tower, and the cooling spray guns are distributed in two layers, upper and lower.

[0008] Furthermore, the cooling spray gun comprises a blocking plate, a water inlet pipe, an air inlet pipe, a sleeve, a diverter plate, a nozzle and a nozzle; cooling water enters through the water inlet pipe, compressed air enters through the air inlet pipe, cooling water and compressed air are mixed in proportion through the diverter plate and enter the nozzle, and are sprayed in an umbrella-like manner through the nozzle to convection with the flue gas to cool the flue gas.

[0009] Furthermore, the end face of the smoke inlet is an inclined port with an inclination angle of 50° to 80°.

[0010] Furthermore, a sewage outlet is provided at the bottom center of the smoke inlet section of the spray tower.

[0011] The beneficial effects of the utility model are: the spray tower body is equipped with a cooling water system to increase the service life of the equipment, reduce the maintenance and maintenance costs; the flue gas switching operation is simple and easy to operate in the emergency state of the furnace. The device can cool the high-temperature flue gas to about 150°C and then discharge it into the environmental dust collection system for treatment, so that the flue gas temperature meets the working conditions of the environmental dust collection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the spray tower of the utility model emergency device;

[0013] Figure 2 It is a schematic diagram of the cooling spray gun of the utility model;

[0014] In the figure: spray tower smoke exhaust section 1, first cooling water inlet 11, first cooling water return port 12, first cooling water channel 13, smoke exhaust port 14, spray tower cooling section 2, cooling spray gun 21, blocking plate 211, water inlet pipe 212, air inlet pipe 213, sleeve 214, diverter plate 215, nozzle 216, nozzle 217, spray tower smoke inlet section 3, third cooling water inlet 31, third cooling water return port 32, third cooling water channel 33, smoke inlet 34, sewage outlet 4. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0016] like Figure 1 As shown, a cooling device for emergency treatment of smelting flue gas includes a spray tower body, which includes a spray tower smoke inlet section 3, a spray tower cooling section 2 and a spray tower smoke exhaust section 1 connected in sequence from bottom to top, and each section is fixedly connected by a flange structure; the spray tower is a steel water jacket structure, and each section is respectively provided with a cooling water inlet, a cooling water channel and a cooling water return port. A sewage outlet 4 is provided at the bottom center of the spray tower smoke inlet section 3.

[0017] The spray tower smoke inlet section 3 is provided with a first cooling water inlet 11, a first cooling water channel 13 and a first cooling water return port 12, the spray tower cooling section 2 is provided with a second cooling water inlet, a second cooling water channel and a second cooling water return port, and the spray tower smoke exhaust section 1 is provided with a third cooling water inlet 31, a third cooling water channel 33 and a third cooling water return port 32. The cooling water inlet is located at the bottom, and the cooling water return port is located at the top.

[0018] like Figure 2As shown, a plurality of cooling spray guns 21 are arranged in the cooling section 2 of the spray tower. The cooling spray guns 21 are distributed in two layers, and the number of the spray guns 21 is 2 groups, 8 in total. The cooling spray guns 21 include a blocking plate 211, a water inlet pipe 212, an air inlet pipe 213, a sleeve 214, a splitter plate 215, a nozzle 216 and a nozzle 217. The cooling water enters through the water inlet pipe 212, and the compressed air enters through the air inlet pipe 213. The cooling water and the compressed air are mixed in proportion through the splitter plate 215 and enter the nozzle 216. They are sprayed in an umbrella-like manner through the nozzle 217 to convect with the flue gas to cool the flue gas.

[0019] During operation, when the environmentally friendly flue gas of the metallurgical furnace enters the smoke inlet section 3 of the spray tower from the smoke inlet 34, the valves of the cooling water pipe of the spray tower shell and the cooling spray gun 21 are respectively sprayed, and the compressed air and cooling water are mixed and sprayed together at the cooling spray gun 21, and the water is sprayed in the shape of an atomized umbrella. The high-temperature flue gas contacts the atomized small water droplets upward, the water vaporizes and absorbs heat, the flue gas temperature is reduced, and it is discharged from the exhaust port 14 of the spray tower exhaust section 1, and the exhaust port 14 is externally connected to the environmentally friendly flue gas treatment system.

[0020] The smoke inlet 34 is designed to be tangent to the flue opening of the kiln as much as possible due to the inclined plane. This is mainly because the kiln expands due to heat and there is a misalignment with the smoke inlet 34 of the spray tower. The inclined opening can increase the smoke flow area, and the inclination angle is 50° to 80°.

Claims

1. A smelting flue gas emergency treatment cooling device, characterized in that: The spray tower body comprises a spray tower main body, which comprises, from bottom to top, a spray tower smoke inlet section (3), a spray tower cooling section (2) and a spray tower smoke exhaust section (1) which are connected in sequence, and each section is fixedly connected via a flange structure; a smoke inlet port (34) is provided on the side wall of the spray tower smoke inlet section (3), and the smoke inlet port (34) is connected to the smoke duct opening of the kiln; a smoke exhaust port (14) is provided on the side wall of the spray tower smoke exhaust section (1), and the smoke exhaust port (14) is connected to a smoke treatment system; The spray tower is a steel water jacket structure, and each section is provided with a cooling water inlet, a cooling water channel and a cooling water return port; a plurality of cooling spray guns (21) are provided in the cooling section (2) of the spray tower, and the cooling spray guns (21) are distributed in upper and lower layers.

2. The smelting fume emergency treatment cooling device according to claim 1 is characterized in that: The cooling spray gun (21) comprises a blocking plate (211), a water inlet pipe (212), an air inlet pipe (213), a sleeve (214), a flow divider (215), a spray head (216), and a nozzle (217); cooling water enters through the water inlet pipe, compressed air enters through the air inlet pipe, cooling water and compressed air are mixed in proportion through the flow divider, and enter the spray head (216), and are sprayed in an umbrella-like manner through the nozzle (217) to counterflow with the flue gas, thereby cooling the flue gas.

3. The smelting fume emergency treatment and cooling device according to claim 1 is characterized in that: The end surface of the smoke inlet (34) is an inclined opening, and the inclination angle is 50° to 80°.

4. The smelting fume emergency treatment and cooling device according to claim 1 is characterized in that: A sewage outlet (4) is provided at the bottom centre of the smoke inlet section (3) of the spray tower.

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