Waste gas recycling device of aluminum silicate cotton heating furnace

Abstract

The utility model discloses a kind of waste gas recycling devices of aluminium silicate cotton heating furnace, including furnace core and shell, the heat exchange cavity formed between furnace core and shell, the heat exchange structure that waste heat recovery utilization can be generated to furnace core in the heat exchange cavity is provided;The top of the furnace core is fixed with the flow equalizing plate that can make waste gas evenly enter the heat exchange cavity, the outer portion of the shell is provided with water supply pipeline, the bottom of the shell is provided with gas outlet;The utility model is by borrowing the shell of conventional heating furnace, it is used as the inner bag of heat exchange equipment, a new shell is additionally provided outside, closed heat exchange cavity is formed between two layers of shell, and heat exchange structure is arranged in the heat exchange cavity between furnace core and shell, waste heat recovery function and heating furnace ontology integration integration, without additional configuration split heat exchange equipment, can reduce the occupation of equipment to site space, improve the adaptability of site limited enterprise use.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically to a waste gas recycling device for an aluminum silicate cotton heating furnace. Background Technology

[0002] Heating furnaces are widely used in many fields such as metallurgy, chemical industry, and building materials, and can realize operations such as material heating, drying, and smelting.

[0003] Traditional heating furnaces generate large amounts of high-temperature waste gas during operation. This waste gas not only carries a significant amount of heat energy, but direct emission can also cause thermal and air pollution. To recover waste heat from the waste gas and improve energy efficiency, the traditional approach is to add a separate heat exchanger. While this separate heat exchanger can achieve some degree of waste heat recovery, it requires a considerable amount of additional space because it is independent of the furnace. This can be limiting for companies with limited space; furthermore, the integration of separate equipment is not high enough, making it inconvenient to move or transport within the workshop, and the furnace cannot achieve multiple uses. Utility Model Content

[0004] The purpose of this utility model is to provide a waste gas recycling device for an aluminum silicate cotton heating furnace. By integrating the heat exchange structure with the furnace body, it can recover waste heat from the waste gas, save space resources, improve equipment integration and flexibility of use, and achieve the integration of heating and waste heat recovery.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste gas recycling device for an aluminum silicate cotton heating furnace, comprising a furnace core and a shell, wherein a heat exchange cavity is formed between the furnace core and the shell, and a heat exchange structure capable of recovering and utilizing the waste heat generated by the furnace core is provided in the heat exchange cavity.

[0006] The heat exchange structure includes a heat exchange tube for cold water transport, the outer wall of the heat exchange tube is welded with fins, the top of the furnace core is fixed with a flow equalization plate that allows exhaust gas to enter the heat exchange chamber evenly, a water supply pipe is provided on the outside of the outer shell, and an air outlet is provided at the bottom of the outer shell, the air outlet being connected to the heat exchange chamber.

[0007] Preferably, the furnace core is configured from the inside out as an inner heating layer, an aluminum silicate cotton insulation layer, and an outer support layer. The top of the furnace core is fixed with a cover that seals the top of the inner heating layer, the aluminum silicate cotton insulation layer, and the outer support layer. The flow equalization plate is fixed above the cover.

[0008] Preferably, the inner cavity of the outer shell is fixed with a heat insulation layer, the top of the outer shell is fixed with a top cover that can seal the top of the heat exchange chamber, and a furnace door is hinged to the middle of the top cover.

[0009] Preferably, the inner cavity of the flow equalization plate is provided with a plurality of through holes for the exhaust gas to pass through. The through holes penetrate the inner wall and the outer wall of the flow equalization plate. One end of the through hole is connected to the inner cavity of the inner heating layer, and the other end of the through hole is connected to the heat exchange cavity.

[0010] Preferably, the water supply pipe includes an inlet pipe and an outlet pipe. The inlet pipe is located at the bottom of the outer shell and is connected to the inlet of the heat exchange tube. The outlet pipe passes through the side wall of the outer shell and is connected to the outlet of the heat exchange tube.

[0011] Preferably, the heat exchange tube comprises two sets of spirally ascending and intertwined tubes, each set of tubes being provided with a set of outlets and a set of inlets.

[0012] Preferably, the insulation layer is an aluminum silicate cotton layer, and the outer support layer is wrapped with a high-temperature resistant sealing film to prevent flue gas from penetrating.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model utilizes the outer shell of a traditional heating furnace as the inner liner of a heat exchange device, and adds a new outer shell to the outside, forming a closed heat exchange chamber between the two outer shells. A heat exchange structure is set in the heat exchange chamber between the furnace core and the outer shell, integrating the waste heat recovery function with the heating furnace body. There is no need to configure separate heat exchange equipment, which can reduce the space occupied by the equipment and improve the adaptability of the equipment to enterprises with limited space.

[0015] 2. This utility model can realize the multi-purpose function of the heating furnace, with higher integration and more compact overall size, making it easy to transport and move within the workshop; by recovering the waste heat of the exhaust gas to heat the water in the water pipe, a large amount of hot water can be generated, which can meet various production and living needs of the enterprise, such as process water, employee bathing water, etc., and is convenient to use. Attached Figure Description

[0016] Figure 1 This is an exploded view of this utility model;

[0017] Figure 2 This is a schematic diagram of the top structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the furnace core of this utility model.

[0020] In the diagram: 1. Furnace core; 2. Outer shell; 3. Heat exchange chamber; 4. Heat exchange tube; 5. Fins; 6. Flow equalization plate; 7. Water supply pipe; 8. Gas outlet;

[0021] 101. Inner heating layer; 102. Aluminum silicate cotton insulation layer; 103. Outer support layer; 104. Cover; 105. Insulation layer; 106. Top cover; 107. Furnace door; 108. Through hole;

[0022] 701. Inlet pipe; 702. Outlet pipe; 703. Pipe body. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a waste gas recycling device for an aluminum silicate cotton heating furnace, including a furnace core 1 and a shell 2, wherein a heat exchange chamber 3 is formed between the furnace core 1 and the shell 2, and a heat exchange structure capable of recovering and utilizing the waste heat generated by the furnace core 1 is provided in the heat exchange chamber 3.

[0025] The heat exchange structure includes a heat exchange tube 4 for cold water transport. The outer wall of the heat exchange tube 4 is welded with fins 5. When the cold water flows inside the tube, it forms a temperature difference with the high-temperature exhaust gas outside the heat exchange tube 4, and heat is transferred through the tube wall. The fins 5 increase the contact area between the heat exchange tube 4 and the exhaust gas, which can improve the heat exchange efficiency. The top of the furnace core 1 is fixed with a flow equalization plate 6 that can make the exhaust gas enter the heat exchange chamber 3 evenly. The outer shell 2 is provided with a water supply pipe 7. The bottom of the outer shell 2 is provided with an air outlet 8, which is connected to the heat exchange chamber 3.

[0026] An independent heat exchange space is constructed by nesting the furnace core 1 and the outer shell 2, allowing the high-temperature exhaust gas generated by the furnace core 1 to flow within this enclosed space. At the same time, the heat exchange structure in the heat exchange chamber 3 is used to transfer the waste heat in the exhaust gas to the heat exchange medium by means of heat conduction, thereby realizing the directional recovery of waste heat.

[0027] The flow equalization plate 6 guides the exhaust gas discharged from the furnace core 1 to be evenly dispersed into the heat exchange chamber 3, avoiding local accumulation of exhaust gas and resulting in uneven heat exchange; the water supply pipe 7 provides a continuous cold water input and hot water output channel for the heat exchange tube 4; the gas outlet 8 discharges the low-temperature exhaust gas after heat exchange, completing the closed loop of exhaust gas circulation.

[0028] The furnace core 1 is configured from the inside out as an inner heating layer 101, an aluminum silicate cotton insulation layer 102, and an outer support layer 103. The top of the furnace core 1 is fixed with a cover 104 that seals the top of the inner heating layer 101, the aluminum silicate cotton insulation layer 102, and the outer support layer 103. The flow equalization plate 6 is fixed above the cover 104.

[0029] The inner heating layer 101 is used to directly heat the material and generate high-temperature exhaust gas. It is equipped with an electric heating tube, which generates heat by passing electricity and transfers the heat to the material by radiation or conduction. The aluminum silicate cotton insulation layer 102 utilizes its low thermal conductivity to reduce the heat loss of the inner heating layer 101 to the outside and ensure heating efficiency. The outer support layer 103 provides structural support for the furnace core 1 and resists thermal deformation and external impact during the heating process.

[0030] The inner heating layer 101 is an electric heating tube and an outer heating tube used as a carrier for the electric heating tube, and the outer support layer 103 is made of carbon steel.

[0031] The cover 104 seals the top of the furnace core 1, so that the exhaust gas generated by the inner heating layer 101 can only enter the heat exchange chamber 3 through the flow equalization plate 6, thus preventing exhaust gas leakage; the flow equalization plate 6 is fixed above the cover 104 to receive and disperse the exhaust gas discharged from the furnace core 1.

[0032] The inner cavity of the outer shell 2 is fixed with a heat insulation layer 105, which wraps around the outside of the heat exchange chamber 3 to reduce the heat loss of the high-temperature exhaust gas in the heat exchange chamber 3 to the outside environment. The top of the outer shell 2 is fixed with a top cover 106 that can seal the top of the heat exchange chamber 3. A furnace door 107 is hinged to the middle of the top cover 106. The furnace door 107 is opened and closed through the hinge structure, which facilitates the feeding or removal of materials into the furnace core 1 from the top.

[0033] The flow equalization plate 6 has several through holes 108 for waste gas to enter. The through holes 108 penetrate the inner and outer walls of the flow equalization plate 6. One end of the through hole 108 is connected to the inner cavity of the inner heating layer 101, and the other end is connected to the heat exchange chamber 3. The high-temperature waste gas generated by the inner heating layer 101 flows directionally into the heat exchange chamber 3 from the inside of the furnace core 1 through the through holes 108 on the flow equalization plate 6. The multiple through holes 108 divert the waste gas, so that the waste gas is evenly distributed to different areas of the heat exchange chamber 3 and makes full contact with the heat exchange tubes 4.

[0034] The water supply pipe 7 includes an inlet pipe 701 and an outlet pipe 702. The inlet pipe 701 is located at the bottom of the outer casing 2 and communicates with the inlet of the heat exchange pipe 4. The outlet pipe 702 penetrates the side wall of the outer casing 2 and communicates with the outlet of the heat exchange pipe 4. Cold water enters the heat exchange pipe 4 through the inlet pipe 701 located at the bottom of the outer casing 2. As it flows along the path inside the pipe, it absorbs the waste heat from the exhaust gas and gradually heats up. The heated hot water is discharged through the outlet pipe 702 on the side wall.

[0035] The heat exchange tube 4 includes two sets of spirally ascending, interlaced tubes 703. These two sets of spirally ascending tubes 703 are staggered within the heat exchange chamber 3, increasing the contact length and coverage area between the heat exchange tube 4 and the high-temperature exhaust gas. Each set of tubes 703 is equipped with one outlet and one inlet. Each set of tubes 703 has independent water inlet and outlet, enabling parallel heat exchange.

[0036] The insulation layer 105 is an aluminum silicate cotton layer, and the outer support layer 103 is wrapped with a high-temperature resistant sealing film to prevent flue gas penetration. The aluminum silicate cotton layer has excellent high-temperature resistance and heat insulation properties, which can effectively prevent heat loss from the heat exchange cavity 3 and maintain the high-temperature environment of the heat exchange cavity 3; the high-temperature resistant sealing film tightly wraps the outer support layer 103, and uses its sealing properties to prevent exhaust gas from penetrating from the interlayer gaps of the furnace core 1 to areas outside the heat exchange cavity 3.

[0037] When in use, open the furnace door 107 hinged in the middle of the top cover 106, put the material to be heated into the inner heating layer 101 of the furnace core 1, and then close the furnace door 107 to form a closed heating space.

[0038] The heating element in the inner heating layer 101 is powered on and generates heat, which is transferred to the material through radiation and conduction to realize heating, drying and other process operations.

[0039] The high-temperature exhaust gas generated during the heating process is retained in the inner cavity of the inner heating layer 101. Under the sealing effect of the cover 104 and the pressure difference, the high-temperature exhaust gas in the inner heating layer 101 flows into several through holes 108 opened in the flow equalization plate 6.

[0040] The through hole 108 evenly distributes the concentrated exhaust gas, allowing the exhaust gas to be discharged from the other side of the flow equalization plate 6 in a dispersed state and smoothly enter the heat exchange chamber 3 formed between the furnace core 1 and the outer shell 2.

[0041] External cold water enters the heat exchange chamber 3 through the inlet pipe 701 at the bottom of the outer shell 2 and is fed into two sets of spirally coiled tubes 703, forming a continuous cold source input. The high-temperature exhaust gas entering the heat exchange chamber 3 contacts the outer wall of the heat exchange tube 4 and transfers the waste heat to the cold water flowing inside the tube through heat conduction. The fins 5 welded to the outer wall of the heat exchange tube 4 can increase the contact area and improve the heat exchange efficiency. The aluminum silicate cotton insulation layer 105 in the inner cavity of the outer shell 2 effectively prevents the heat in the heat exchange chamber 3 from being lost to the outside, maintaining a high-temperature heat exchange environment. The cold water gradually heats up as it flows along the spiral path in the tube 703, and the hot water that is finally formed is discharged through the outlet pipe 702 that penetrates the side wall of the outer shell 2 for use in the enterprise's production process water, employee bathing, and other needs.

[0042] After the waste heat is transferred, the waste gas continues to flow downward in the heat exchange chamber 3 and is finally discharged from the equipment through the outlet 8 at the bottom of the outer shell 2, which is connected to the heat exchange chamber 3, for subsequent purification and other treatments, thus realizing a cycle path of heating-waste gas treatment-waste heat utilization.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas recycling device for an aluminosilicate cotton heating furnace, characterized in that: It includes a furnace core (1) and an outer shell (2), and a heat exchange chamber (3) is formed between the furnace core (1) and the outer shell (2). The heat exchange chamber (3) is provided with a heat exchange structure that can recover and utilize the waste heat generated by the furnace core (1). The heat exchange structure includes a heat exchange tube (4) for cold water transport. The outer wall of the heat exchange tube (4) is welded with fins (5). The top of the furnace core (1) is fixed with a flow equalization plate (6) that allows the exhaust gas to enter the heat exchange chamber (3) evenly. A water supply pipe (7) is provided on the outside of the outer shell (2). An air outlet (8) is provided at the bottom of the outer shell (2). The air outlet (8) is connected to the heat exchange chamber (3).

2. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 1, characterized in that: The furnace core (1) is arranged from the inside to the outside as an inner heating layer (101), an aluminum silicate cotton insulation layer (102), and an outer support layer (103). The top of the furnace core (1) is fixed with a cover (104) that seals the top of the inner heating layer (101), the aluminum silicate cotton insulation layer (102), and the outer support layer (103). The flow equalization plate (6) is fixed above the cover (104).

3. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 2, characterized in that: The inner cavity of the outer shell (2) is fixed with a heat insulation layer (105), and the top of the outer shell (2) is fixed with a top cover (106) that can seal the top of the heat exchange chamber (3). A furnace door (107) is hinged to the middle of the top cover (106).

4. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 3, characterized in that: The flow equalization plate (6) has several through holes (108) for waste gas to pass through. The through holes (108) penetrate the inner and outer walls of the flow equalization plate (6). One end of the through hole (108) is connected to the inner cavity of the inner heating layer (101), and the other end of the through hole (108) is connected to the heat exchange chamber (3).

5. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 4, characterized in that: The water supply pipe (7) includes an inlet pipe (701) and an outlet pipe (702). The inlet pipe (701) is located at the bottom of the outer shell (2) and is connected to the inlet of the heat exchange pipe (4). The outlet pipe (702) penetrates the side wall of the outer shell (2) and is connected to the outlet of the heat exchange pipe (4).

6. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 5, characterized in that: The heat exchange tube (4) includes two sets of spirally ascending and intertwined tube bodies (703), each set of tube bodies (703) is provided with a set of water outlets and a set of water inlets.

7. The waste gas recycling device for an aluminosilicate cotton heating furnace according to claim 6, characterized in that: The insulation layer (105) is configured as an aluminum silicate cotton layer, and the outer support layer (103) is wrapped with a high-temperature resistant sealing film to prevent flue gas from penetrating.

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