Central heat exchanger for bright annealing bell-type furnace

Abstract

The utility model discloses a central heat exchanger for a bright annealing bell-type furnace, which comprises a heat exchanger shell, a heat exchanger is arranged in the heat exchanger shell, the heat exchanger comprises a support and a heat exchange tube, the heat exchanger shell is arranged in a double-layer mode, an inner heat insulation layer is arranged in the heat exchanger shell, and the heat exchange tube is arranged in the heat exchanger shell. A smoke inlet is formed in the upper side of the heat exchanger shell, a smoke outlet is formed in the lower side of the heat exchanger shell, and an air outlet and an air inlet are formed in the left side of the heat exchanger shell. The heat exchanger has the advantages that the heat exchanger shell is arranged in a double-layer mode, the heat preservation layer is arranged in the heat exchanger shell, and the heat exchanger has efficient heat preservation and heat insulation performance and is dampproof, waterproof, light, high in strength, A-level fireproof, safe and environmentally friendly; by arranging the annular plate, the use intensity of the air outlet can be improved, and the air outlet is protected; the residence time of air in the heat exchanger is prolonged, the flowing speed of air entering is high, the flowing speed of air exiting is low, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of industrial annealing in metallurgical manufacturing, in particular to a central heat exchanger used for a bright annealing bell-type furnace. Background Art

[0002] With the rapid development of industry, the steel market's demand for cold-rolled strip steel is increasing year by year, especially high-quality strip steel with clean surface. At present, many large steel companies use bell-type furnaces to bright anneal strip steel. Bright annealing bell-type furnace is a kind of equipment used for annealing of metal materials. It adopts resistance heating and special bell-type design, which can provide stable temperature and heating environment under oxygen-free or controlled atmosphere. However, when annealing in bell-type furnace, a large amount of high-temperature exhaust gas will be generated. If it is directly discharged into the atmosphere, it will cause great energy waste and pollute the environment. Installing a heat exchanger on the bell-type furnace and using the heat of the exhaust gas to preheat the fresh combustion air can greatly reduce gas consumption.

[0003] However, in the process of implementing the utility model technical solution in the embodiment of the present application, the applicant found that the above technology has at least the following technical problems:

[0004] The energy utilization rate of the heat exchanger needs to be further improved, the utilization of flue gas heat needs to be improved, and the energy dissipation of the heat exchanger needs to be reduced. Utility Model Content

[0005] The embodiment of the present application provides a central heat exchanger for a bright annealing bell-type furnace, with an internal insulation layer having high-efficiency thermal insulation performance, etc., and improves the use intensity at the air outlet through a ring plate; increases the residence time of air in the heat exchanger, and improves the heat exchange efficiency.

[0006] The embodiment of the present application provides a central heat exchanger for a bright annealing bell-type furnace, comprising: a heat exchanger shell, a heat exchanger is arranged in the heat exchanger shell, the heat exchanger comprises a bracket and a heat exchange tube, the heat exchanger shell is a double-layer arrangement, an inner insulation layer is arranged in the heat exchanger shell, a smoke inlet is arranged on the upper side of the heat exchanger shell, a smoke outlet is arranged on the lower side, an air outlet and an air inlet are arranged on the left side, the air outlet is arranged on the upper side of the air inlet, the air outlet and the air inlet are connected to the heat exchanger, the bracket is arranged in the heat exchanger shell, and a partition is arranged in the middle of the bracket.

[0007] The inner heat-insulating layer comprises: a fiberboard, a fiber blanket and a square hole screen, and the heat-insulating layer is fixed in the shell of the heat exchanger by fixing steel nails.

[0008] The outer ring of the air outlet is provided with a ring plate, and a connecting flange 1 is provided on the air outlet. The connecting flange 1 is fixed to the air outlet by bolts, and a connecting flange 2 is fixed to the air inlet by welding. The air outlet is 1.2-1.3 times larger in diameter than the air inlet.

[0009] The partition is arranged at the lower 2 / 5 position of the bracket, the bottom of the bracket is arranged on the heat exchanger shell in an embedded manner, the bottom of the bracket is in contact with the standing plate, and the standing plate is arranged in the inner insulation layer.

[0010] A square flange is arranged at the smoke inlet by welding, and the pressure plate is fixed on the square flange by bolts. The middle part of the pressure plate is a rectangular smoke inlet, and strip grooves are evenly arranged on the pressure plate of the outer circle of the smoke inlet.

[0011] The heat exchanger shell at the rear side of the flue gas inlet is arranged as a 45° inclined surface.

[0012] A pair of lifting rings are welded on the upper side of the heat exchanger shell, and a pair of channel steels are welded on the lower side.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] 1. The heat exchanger shell adopts a double-layer setting, with an insulation layer inside. The temperature layer uses fiberboard, fiber blanket and square hole screen. It has high-efficiency thermal insulation performance, moisture-proof and waterproof, light weight and high strength, A-level fire protection, safety and environmental protection.

[0015] 2. By setting a ring plate, the use intensity of the air outlet can be improved and the air outlet can be protected; setting the air outlet larger than the air inlet can increase the residence time of the air in the heat exchanger, and then setting the partition at a lower position so that the air enters at a fast flow rate and leaves at a slow flow rate, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the specific structure of the utility model;

[0017] Figure 2 It is a side view of the utility model. DETAILED DESCRIPTION

[0018] The embodiment of the present application provides a central heat exchanger for a bright annealing bell-type furnace, with an internal insulation layer having high-efficiency thermal insulation performance, etc., and improves the use intensity at the air outlet through a ring plate; increases the residence time of air in the heat exchanger, and improves the heat exchange efficiency.

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Embodiment 1

[0020] A central heat exchanger for a bright annealing bell-type furnace, comprising: a heat exchanger shell 1, a heat exchanger is arranged in the heat exchanger shell 1, the heat exchanger comprises a bracket and a heat exchange tube, the heat exchanger shell 1 is a double-layer arrangement, an inner insulation layer 9 is arranged in the heat exchanger shell 1, a smoke inlet 17 is arranged on the upper side of the heat exchanger shell 1, a smoke outlet 8 is arranged on the lower side, an air outlet 3 and an air inlet 5 are arranged on the left side, the air outlet 3 is arranged on the upper side of the air inlet 5, the air outlet 3 and the air inlet 5 are connected to the heat exchanger, the bracket is arranged in the heat exchanger shell 1, and a partition 4 is arranged in the middle of the bracket;

[0021] The inner insulation layer 9 comprises: a fiberboard, a fiber blanket and a square hole screen, and the insulation layer is fixed in the heat exchanger shell 1 by fixing steel nails.

[0022] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0023] An inner insulation layer 9 is provided in the heat exchanger shell, which can effectively insulate the interior, prevent the internal temperature from escaping, and improve the energy utilization rate;

[0024] The insulation layer uses fiberboard, fiber blanket and square hole screen (fiberboard, fiber blanket and square hole screen are arranged according to actual usage), which has high-efficiency thermal insulation performance, moisture-proof and waterproof, light weight and high strength, Class A fire protection, safety and environmental protection. Embodiment 2

[0025] A central heat exchanger for a bright annealing bell-type furnace, wherein the outer ring of the air outlet 3 is provided with a ring plate 2, the air outlet 3 is provided with a connecting flange 14, the connecting flange 14 is fixed to the air outlet 3 by bolts, the air inlet 5 is fixed with a connecting flange 2 13 by welding, and the air outlet 3 is 1.2-1.3 times larger in diameter than the air inlet 5.

[0026] The partition plate 4 is arranged at the lower 2 / 5 position of the bracket, the bottom of the bracket is arranged on the heat exchanger shell 1 by embedding, the bottom of the bracket is in contact with the standing plate 6, and the standing plate 6 is arranged in the inner insulation layer 9.

[0027] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0028] By setting the ring plate 2, the use intensity of the air outlet 3 can be improved and the air outlet 3 can be protected; the air outlet 3 is set larger than the air inlet 5, which can increase the residence time of the air in the heat exchanger, and then the partition plate 4 is set at a lower position, so that the air inflow velocity is fast and the outflow velocity is slow, thereby improving the heat exchange efficiency;

[0029] The standing plate 6 is provided to support the bracket, thereby preventing the heat exchanger housing 1 from being deformed due to the weight of the bracket, and improving the use strength of the heat exchanger. Embodiment 3

[0030] A central heat exchanger for a bright annealing bell-type furnace, wherein a flange 15 is provided at the flue gas inlet 17 by welding, wherein a pressing plate 12 is fixed to the flange 15 by bolts, wherein the middle of the pressing plate 12 is a rectangular smoke inlet 11, and strip grooves 10 are evenly provided on the pressing plate 12 on the outer circle of the smoke inlet 11;

[0031] The heat exchanger housing 1 at the rear side of the flue gas inlet 17 is set to an inclined surface of 45°;

[0032] A pair of lifting rings 16 are welded on the upper side of the heat exchanger shell 1, and a pair of channel steels 7 are welded on the lower side.

[0033] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0034] The pressure plate 12 on the flue gas inlet 17 is provided with a strip groove 10, which can play a role in simple filtering of the flue gas and prevent large particles of impurities from clogging the interior; an inclined surface is provided on the heat exchanger shell behind the flue gas inlet 17, which can play a certain guiding and buffering role for the incoming flue gas; by providing the lifting ring 16 and the channel steel 7, not only the lifting ring 16 is convenient for moving the utility model, but also the channel steel 7 can play a supporting role during installation.

[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A central heat exchanger for a bright annealing bell-type furnace, characterized in that: include: A heat exchanger shell, wherein a heat exchanger is arranged in the heat exchanger shell, wherein the heat exchanger comprises a bracket and a heat exchange tube, wherein the heat exchanger shell is double-layered, wherein an inner heat-insulating layer is arranged in the heat exchanger shell, wherein a smoke inlet is arranged on the upper side of the heat exchanger shell, a smoke outlet is arranged on the lower side, an air outlet and an air inlet are arranged on the left side, wherein the air outlet is arranged on the upper side of the air inlet, wherein the air outlet and the air inlet are connected to the heat exchanger, wherein the bracket is arranged in the heat exchanger shell, wherein a partition is arranged in the middle of the bracket; The outer ring of the air outlet is provided with a ring plate, the air outlet is provided with a connecting flange 1, the connecting flange 1 is fixed to the air outlet by bolts, the air inlet is fixed with a connecting flange 2 by welding, and the air outlet is 1.2-1.3 times larger in diameter than the air inlet; The partition is arranged at the lower 2 / 5 position of the bracket, the bottom of the bracket is arranged on the heat exchanger shell in an embedded manner, the bottom of the bracket is in contact with the standing plate, and the standing plate is arranged in the inner insulation layer.

2. A central heat exchanger for a bright annealing bell-type furnace according to claim 1, characterized in that: The inner heat-insulating layer comprises: a fiberboard, a fiber blanket and a square hole screen, and the heat-insulating layer is fixed in the shell of the heat exchanger by fixing steel nails.

3. A central heat exchanger for a bright annealing bell-type furnace as claimed in claim 1, characterized in that: A method flange is arranged at the smoke inlet by welding, a pressure plate is fixed on the method flange by bolts, the middle of the pressure plate is a rectangular smoke inlet, and strip grooves are evenly arranged on the pressure plate on the outer circle of the smoke inlet.

4. A central heat exchanger for a bright annealing bell-type furnace as claimed in claim 1, characterized in that: The heat exchanger shell at the rear side of the flue gas inlet is arranged as a 45° inclined surface.

5. A central heat exchanger for a bright annealing bell-type furnace as claimed in claim 1, characterized in that: A pair of lifting rings are welded on the upper side of the heat exchanger shell, and a pair of channel steels are welded on the lower side.

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