CN215288891U

CN215288891U - Hot air taking system of annealing furnace

Info

Publication number: CN215288891U
Application number: CN202022600064.9U
Authority: CN
Inventors: 王松伟; 蔡立亮
Original assignee: Hebei Jingdong Pipe Industry Co ltd
Current assignee: Hebei Jingdong Pipe Industry Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-12-24
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a hot air taking system of an annealing furnace, which belongs to the technical field of steel casting equipment. Which can sufficiently recover heat in the annealing process. The heat recovery device comprises a wind taking cover, a heat exchange boiler, a hot air pipe, a return air pipe, a heat output mechanism and a water source, wherein two ends of the wind taking cover are open, the wind taking cover is sleeved outside the heat removing furnace, two ends of the wind taking cover are sealed with the side wall of the heat removing furnace through asbestos, a hot air cavity is formed between the wind taking cover and the heat removing furnace, the side wall of the wind taking cover is provided with an air inlet and an air outlet, two ends of the hot air pipe are respectively connected with the air outlet and an air inlet port of the heat exchange boiler, and two ends of the return air pipe are respectively connected with the air inlet and a return air port of the heat exchange boiler; and a heat exchange tube is arranged in the heat exchange boiler, and two ends of the heat exchange tube are respectively communicated with the heat output mechanism and a water source.

Description

Hot air taking system of annealing furnace

Technical Field

The utility model belongs to the technical field of steel casting equipment, especially, relate to a hot-blast system is got to annealing stove.

Background

Annealing is a heat treatment process for metals, which refers to slowly heating the metal to a certain temperature, holding for a sufficient time, and then cooling at a suitable rate. The purpose is to reduce hardness and improve machinability; the residual stress is reduced, the size is stabilized, and the deformation and crack tendency is reduced; refining grains, adjusting the structure and eliminating the structure defects. Specifically, annealing is a heat treatment process for a material.

In the process, a large amount of heat energy is wasted along with the cooling of materials, the heat energy is wasted, the environment is polluted, and in addition, the high-temperature flue gas in the hearth also contains a large amount of heat energy, so that the application of new energy-saving technologies is increasingly emphasized along with the increasing tension of energy supply. The system aims at the problems that the energy consumption of the system is high and the production cost is relatively high because the heat of the high-temperature slag of the existing gasification furnace is not recycled and utilized.

Disclosure of Invention

The utility model provides a hot air system is got to annealing stove, it can fully retrieve the heat in the annealing process.

The utility model discloses a solve technical problem through following technical scheme:

a hot air taking system of an annealing furnace comprises an air taking cover, a heat exchange boiler, a hot air pipe, an air return pipe, a heat output mechanism and a water source, wherein two ends of the air taking cover are open, the air taking cover is sleeved outside the heat removal furnace, two ends of the air taking cover are sealed with the side wall of the heat removal furnace through asbestos, an air cavity is formed between the air taking cover and the heat removal furnace, an air inlet and an air outlet are formed in the side wall of the air taking cover, two ends of the hot air pipe are respectively connected with the air outlet and an air inlet port of the heat exchange boiler, and two ends of the air return pipe are respectively connected with the air inlet and an air return port of the heat exchange boiler; and a heat exchange tube is arranged in the heat exchange boiler, and two ends of the heat exchange tube are respectively communicated with the heat output mechanism and a water source.

Above-mentioned hot-blast system is got to annealing stove, heat output mechanism includes output pipeline and hydrophobic mechanism, hydrophobic mechanism includes casing, check valve and hydrophobic core, hydrophobic core is located the casing, the top of casing is equipped with the steam delivery outlet, and casing lateral wall bottom is equipped with the import, the import passes through output pipeline intercommunication with the heat exchange tube, the casing top is equipped with the delivery port, the delivery port is equipped with the check valve outward, and water can pass through the outflow casing of check valve.

Above-mentioned hot-blast system is got to annealing stove, hydrophobic core includes confined barrel and metal fillings, the outer wall of barrel laminates with the inner wall of casing mutually, the metal fillings are full of the barrel, the barrel is the metal mesh material.

According to the hot air taking system of the annealing furnace, the water source is communicated with the water inlet end of the heat exchange tube through the connecting tube, and the connecting tube is provided with the flow control valve.

In the hot air taking system of the annealing furnace, the return air pipe is provided with an induced draft fan; the heat exchange tube is provided with a plurality of sets, and the number of the connecting tubes and the number of the heat output mechanisms are matched with that of the heat exchange tubes. And a heat-insulating layer is arranged outside the air taking cover.

Compared with the prior art, the utility model discloses add the fan housing outside the annealing furnace to draw forth the outside heat that gives off of defervescence furnace body with hot-blast form, hot-blast temperature is up to about 150 degrees, hot-blast carries out the heat transfer with the heat exchange tube in the heat exchange boiler, and water in the heat exchange tube is heated steam, through the processing back of hydrophobic mechanism, and steam advances the steam delivery outlet output. The steam can be used for heating or preheating materials in a plant area. Therefore, the heat emission can be reduced, the environmental pollution is improved, the production cost can be reduced by preheating materials, and the resource consumption is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a longitudinal sectional view of the air intake cover of the present invention;

fig. 3 is a longitudinal sectional view of the drainage mechanism of the present invention;

reference numerals in the drawings denote: 1. the system comprises a wind taking cover, a heat exchange boiler, a hot air pipe, a hot air return pipe, a flow control valve, a water source, an air inlet, an air outlet, an output pipeline, a water draining mechanism, a shell, a one-way valve, a water draining core, a steam outlet, a steam inlet, a shell, a heat exchange pipe, a cylinder, a metal chip and a draught fan, wherein the wind taking cover is 2, the heat exchange boiler is 3, the hot air pipe is 4, the air return pipe is 5, the flow control valve is 6, the water source is 7, the air inlet is 8, the air outlet is 9, the output pipeline is 10, the water draining mechanism is 11, the shell is 12, the one-way valve is 13, the water draining core is 14, the steam outlet is 15, the inlet is 16, the heat exchange pipe is 17, the cylinder is 18, and the metal chip is 19.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention.

Referring to the attached drawings 1 to 2, the utility model discloses a fan housing 1, heat exchange boiler 2, hot-blast main 3, return air duct 4, heat output mechanism and water source 6, the both ends of fan housing 1 are the open form, fan housing 1 suit is outside the annealing stove, and the both ends of fan housing 1 and the lateral wall of annealing stove pass through asbestos seal, form the hot-blast chamber between fan housing 1 and the annealing stove, be equipped with air inlet 7 and gas outlet 8 on the lateral wall of fan housing 1, the both ends of hot-blast main 3 are connected with the gas outlet 8 and the inlet port of heat exchange boiler 2 respectively, the both ends of return air duct 4 are connected with the air inlet 7 and the return air port of heat exchange boiler 2 respectively; a heat exchange tube 16 is arranged in the heat exchange boiler 2, and two ends of the heat exchange tube 16 are respectively communicated with the heat output mechanism and the water source 6. An induced draft fan 19 is arranged on the return air pipe 4; set up like this, the draught fan can be with the heat that the stove outwards gived off of bringing down a fever with hot-blast form draw to heat transfer boiler, through the medium in the heat transfer pipe with heat output reuse. In order to improve the heat exchange efficiency, the heat exchange tubes 16 are provided with a plurality of sets in parallel, and the number of the connecting tubes and the number of the heat output mechanisms are matched with that of the heat exchange tubes 16. Thus, heat exchange can be carried out by multiple pipelines.

The water source 6 is communicated with the water inlet end of the heat exchange tube 16 through a connecting tube, and a flow control valve 5 is arranged on the connecting tube. The flow control valve 5 can regulate the water inflow. In order to preserve heat, a heat preservation layer is arranged outside the air taking cover 1.

In order to improve the quality of output hot steam, heat output mechanism includes output pipeline 9 and hydrophobic mechanism 10, hydrophobic mechanism 10 includes casing 11, check valve 12 and hydrophobic core 13, hydrophobic core 13 is located casing 11, the top of casing 11 is equipped with steam delivery outlet 14, and casing 11 lateral wall bottom is equipped with import 15, import 15 and heat exchange tube 16 pass through output pipeline 9 intercommunication, casing 11 top is equipped with the delivery port, the delivery port is equipped with check valve 12 outward, and water can pass through the play casing 11 of check valve 12. After the treatment of the hydrophobic core, the hot steam rises, finally the hot steam is output through a steam output port to be used for preheating materials, and the water after the treatment of the hydrophobic core flows out through a one-way valve outside the water outlet to be used as a heating medium. The check valve can prevent air from entering the shell, and avoid influencing the temperature in the shell.

Preferably, the hydrophobic core body 13 includes a closed cylinder 17 and metal chips 18, an outer wall of the cylinder 17 is attached to an inner wall of the housing 11, the cylinder 17 is filled with the metal chips 18, and the cylinder 17 is made of a metal mesh material. After the water-vapor mixture enters the shell through the inlet, the water-vapor mixture is contacted with metal fragments in the cylinder, under the obstruction of the metal fragments, steam rises, and water drops collide with the metal fragments, move downwards, gather and then flow out through the water outlet.

The working process is as follows:

in order to utilize the temperature of the outer wall of the annealing furnace, the length of the air taking hood is set to be about 20m in actual production, and heat is concentrated in the hot air cavity. Meanwhile, an air taking opening is formed in the air taking cover, hot air is introduced into the heat exchange boiler through the induced draft fan, the hot air exchanges heat with the heat exchange tubes in the heat exchange boiler, water in the heat exchange tubes is heated to generate steam, and the steam is output through a steam outlet after being treated by the drainage mechanism. The hot air after heat exchange returns to the hot air cavity to absorb heat, and hot air circulation can be realized.

In order to avoid too large deviation between theoretical calculation results and actual data, partial tests are recommended to be carried out before implementation, and accurate hot air flow and temperature need to be measured firstly, so that the model and the specification of the heat exchange boiler are determined. The hot air flow and temperature are measured by arranging an air taking port above the air taking cover for an air drawing experiment. The diameter of the air intake opening is 1.5 m. And after the experiment is finished, the hot air pipe and the heat exchange boiler with the corresponding model are installed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The annealing furnace hot air taking system is characterized by comprising an air taking cover (1), a heat exchange boiler (2), a hot air pipe (3), an air return pipe (4), a heat output mechanism and a water source (6), wherein two ends of the air taking cover (1) are in an open shape, the air taking cover (1) is sleeved outside the annealing furnace, two ends of the air taking cover (1) are sealed with the side wall of the annealing furnace through asbestos, a hot air cavity is formed between the air taking cover (1) and the annealing furnace, an air inlet (7) and an air outlet (8) are formed in the side wall of the air taking cover (1), two ends of the hot air pipe (3) are respectively connected with the air outlet (8) and an air inlet port of the heat exchange boiler (2), and two ends of the air return pipe (4) are respectively connected with the air inlet (7) and an air return port of the heat exchange boiler (2); and a heat exchange tube (16) is arranged in the heat exchange boiler (2), and two ends of the heat exchange tube (16) are respectively communicated with the heat output mechanism and the water source (6).

2. The hot air taking system of the annealing furnace according to claim 1, wherein the heat output mechanism comprises an output pipeline (9) and a water drainage mechanism (10), the water drainage mechanism (10) comprises a shell (11), a one-way valve (12) and a water drainage core (13), the water drainage core (13) is positioned in the shell (11), a steam output port (14) is arranged at the top of the shell (11), an inlet (15) is arranged at the bottom of the side wall of the shell (11), the inlet (15) is communicated with the heat exchange pipe (16) through the output pipeline (9), a water outlet is arranged at the top of the shell (11), the one-way valve (12) is arranged outside the water outlet, and water can flow out of the shell (11) through the one-way valve (12).

3. The hot air taking system of the annealing furnace according to claim 2, wherein the hydrophobic core (13) comprises a closed cylinder (17) and metal scraps (18), the outer wall of the cylinder (17) is attached to the inner wall of the shell (11), the metal scraps (18) fill the cylinder (17), and the cylinder (17) is made of metal mesh.

4. The hot air taking system of the annealing furnace according to claim 3, wherein the water source (6) is communicated with the water inlet end of the heat exchange tube (16) through a connecting tube, and the connecting tube is provided with a flow control valve (5).

5. The hot air taking system of the annealing furnace according to claim 4, wherein the return air pipe (4) is provided with an induced draft fan (19); the heat exchange tubes (16) are provided with a plurality of sets, and the number of the connecting tubes and the number of the heat output mechanisms are matched with that of the heat exchange tubes (16); and a heat-insulating layer is arranged outside the air taking cover (1).