Compound energy-saving heat exchange structure of melting holding furnace

Abstract

The utility model discloses a kind of complex energy-saving heat exchange structure of melting heat preservation furnace, it is related to heat exchange structure technical field, including high-temperature radiation heat exchanger and smoke exhaust component, the inside fixed connection of high-temperature radiation heat exchanger has aluminium silicate fibre thermal blanket, the inner wall fixed connection of aluminium silicate fibre thermal blanket has lightweight firebrick inner layer, the low temperature section fixed connection of lightweight firebrick inner layer inside has smoke exhaust component, the smoke exhaust component includes smoke exhaust pipeline, one end of the smoke exhaust pipeline is connected with smoke exhaust air outlet, the middle part of one end of the smoke exhaust air outlet is fixedly connected with flue gas induced draft fan, the surface of the smoke exhaust pipeline one side is fixedly connected with low temperature section temperature sensor;The utility model is through the cascade arrangement of high-temperature radiation heat exchanger, helical heat conducting oil heat exchange coil and low temperature section smoke exhaust component, when personnel operating device is used, can carry out step-by-step recovery to flue gas heat, greatly improve energy utilization, reduce waste heat waste.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange structure technology, specifically a duplex energy-saving heat exchange structure for a melting and holding furnace. Background Technology

[0002] The duplex energy-saving heat exchange structure of the melting and holding furnace is an energy-saving design that achieves efficient recovery of waste heat from flue gas through "multi-level and multi-mode synergistic heat exchange". The core is to recover the heat of different temperature ranges of high-temperature flue gas in layers through multiple heat exchange methods (radiation, convection and conduction), while combining the furnace body insulation optimization to minimize heat loss.

[0003] When using a duplex energy-saving heat exchange structure of an existing melting and holding furnace,

[0004] (1) Poor heat exchange effect, insufficient heat recovery, and a large amount of medium and low temperature waste heat is directly lost through the flue pipe, resulting in energy waste;

[0005] (2) The temperature monitoring of each heat exchange section is inaccurate, making it impossible to make targeted adjustments, and the equipment linkage is poor, which affects the overall operating efficiency.

[0006] To address the above problems, this utility model provides a duplex energy-saving heat exchange structure for a melting and holding furnace. Utility Model Content

[0007] The purpose of this invention is to provide a duplex energy-saving heat exchange structure for a melting and holding furnace. This invention can achieve efficient heat exchange in stages, accurately monitor the temperature of each stage and adjust it in a coordinated manner, thereby solving the problems of poor heat exchange effect, waste of residual heat and inaccurate adjustment of the existing structure.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a duplex energy-saving heat exchange structure for a melting and holding furnace, comprising a high-temperature radiant heat exchanger and a smoke exhaust assembly. An aluminosilicate fiber insulation blanket is fixedly connected inside the high-temperature radiant heat exchanger. A lightweight refractory brick inner layer is fixedly connected to the inner wall of the aluminosilicate fiber insulation blanket. A smoke exhaust assembly is fixedly connected to the low-temperature section inside the lightweight refractory brick inner layer. The smoke exhaust assembly includes a smoke exhaust pipe, with a smoke exhaust outlet connected through one end of the smoke exhaust pipe. A flue gas induced draft fan is fixedly connected to the middle of one end of the smoke exhaust outlet. A low-temperature section temperature sensor is fixedly connected to one side of the surface of the smoke exhaust pipe.

[0009] Furthermore, a flow guide pipe is fixedly connected to one side of the high-temperature radiant heat exchanger, and a high-temperature section temperature sensor is fixedly connected inside the flow guide pipe, which enables real-time monitoring of the flue gas temperature at the inlet of the high-temperature radiant section, providing data support for high-temperature heat exchange efficiency evaluation and equipment protection.

[0010] Furthermore, a flange fixing plate A is fixedly connected to one side of the flow guide pipe, and a flange fixing plate B is fixedly connected to one side of the flange fixing plate A, which enhances the sealing and stability of the connection between the flow guide pipe and the air inlet device, and prevents air leakage from affecting the heat exchange efficiency.

[0011] Furthermore, an air inlet device is fixedly connected to one side of the flange fixing plate B, and a combustion air fan is fixedly connected inside the air inlet device, which achieves the effect of pressurizing the outside cold air and stably sending it into the high-temperature radiation heat exchange section for preheating, thereby increasing the temperature of the combustion air and reducing fuel consumption.

[0012] Furthermore, the insulation section of the inner layer of the lightweight refractory brick is fixedly connected to an insulation layer circulation duct, and one end of the insulation layer circulation duct is fixedly connected to a waste heat circulation fan, which drives the hot air heated by the low temperature section to circulate in the insulation layer, reducing the heat loss of the furnace body and making full use of the low temperature waste heat.

[0013] Furthermore, a spiral heat exchange coil for thermal oil is fixedly connected to the middle of the inner layer of the lightweight refractory brick, and a medium-temperature section temperature sensor is fixedly connected to one side of the surface of the spiral heat exchange coil. This enables the monitoring of the surface temperature of the medium-temperature section coil, indirectly reflecting the heat exchange efficiency between the medium-temperature flue gas and the thermal oil, and ensuring the safe operation of the coil.

[0014] Furthermore, an electric rotary opening and closing structure is fixedly connected to one side of the air intake device, and a support base is fixedly connected to the bottom of the air intake device. This achieves the effect of precisely controlling the amount of air entering by adjusting the opening of the air intake through electric control, while the support base enhances the overall stability of the device.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model provides a duplex energy-saving heat exchange structure for a melting and holding furnace.

[0017] (1) By setting up a series of high-temperature radiant heat exchangers, spiral heat transfer oil heat exchange coils and low-temperature exhaust components, the heat of the flue gas can be recovered step by step when the equipment is in use by personnel, which can greatly improve the energy utilization rate and reduce waste heat.

[0018] (2) Through the coordinated setup of various temperature sensors, electric rotary opening and closing structure, and various fans, the equipment can achieve precise monitoring and intelligent adjustment of each heat exchange section when the equipment is operated by personnel, thereby improving the overall operating efficiency and stability of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the device of this utility model;

[0020] Figure 2This is a schematic diagram of the location and structure of the heat preservation and high temperature protection device of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the high-temperature radiant heat exchanger of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the heat preservation device of this utility model;

[0023] Figure 5 This is a schematic diagram of the air intake device of this utility model.

[0024] In the diagram: 1. High-temperature radiant heat exchanger; 2. Smoke exhaust assembly; 201. Smoke exhaust duct; 202. Smoke exhaust outlet; 203. Smoke exhaust fan; 204. Low-temperature section temperature sensor; 3. Alumina silicate fiber insulation blanket; 4. Lightweight refractory brick inner layer; 5. Guide duct; 6. Combustion air fan; 7. Flange fixing plate A; 8. Flange fixing plate B; 9. Air inlet device; 10. Electric rotary opening and closing structure; 11. High-temperature section temperature sensor; 12. Insulation layer circulating air duct; 13. Waste heat circulation fan; 14. Spiral heat transfer oil heat exchange coil; 15. Medium-temperature section temperature sensor; 16. Support base. Detailed Implementation

[0025] 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.

[0026] To solve the problem of how to effectively position and adjust the technology, such as Figure 1-5 As shown, the following preferred technical solutions are provided:

[0027] A duplex energy-saving heat exchange structure for a melting and holding furnace includes a high-temperature radiant heat exchanger 1 and a flue gas exhaust assembly 2. An aluminum silicate fiber insulation blanket 3 is fixedly connected inside the high-temperature radiant heat exchanger 1. A lightweight refractory brick inner layer 4 is fixedly connected to the inner wall of the aluminum silicate fiber insulation blanket 3. The low-temperature section inside the lightweight refractory brick inner layer 4 is fixedly connected to the flue gas exhaust assembly 2. The flue gas exhaust assembly 2 includes a flue gas exhaust pipe 201. A flue gas exhaust outlet 202 is connected to one end of the flue gas exhaust pipe 201. A flue gas induced draft fan 203 is fixedly connected to the middle of one end of the flue gas exhaust outlet 202. A low-temperature section temperature sensor 204 is fixedly connected to one side of the surface of the flue gas exhaust pipe 201.

[0028] Specifically, when personnel operate the device, the flue gas induced draft fan 203 is started, which introduces the flue gas in the furnace into the exhaust pipe 201. The low-temperature section temperature sensor 204 monitors the temperature of the flue gas in the low-temperature section in real time, so that personnel can understand the heat exchange situation in the low-temperature section. Finally, the flue gas is discharged through the exhaust outlet 202.

[0029] Furthermore, such as Figure 2 As shown, the following preferred technical solutions are provided:

[0030] A flow guide pipe 5 is fixedly connected to one side of the high-temperature radiant heat exchanger 1. A high-temperature section temperature sensor 11 is fixedly connected inside the flow guide pipe 5. The purpose of this design is to monitor the initial temperature of the flue gas entering the high-temperature radiant heat exchanger 1 in real time, so as to provide an accurate basis for evaluating the high-temperature radiant heat exchange efficiency and determining whether high-temperature components need protection.

[0031] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided:

[0032] A flange fixing plate A7 is fixedly connected to one side of the flow guide pipe 5, and a flange fixing plate B8 is fixedly connected to one side of the flange fixing plate A7. The purpose of this design is to enhance the connection strength and sealing between the flow guide pipe 5 and the air inlet device 9 through the tight connection of the two flange fixing plates, so as to avoid leakage during the air transportation process and ensure a stable amount of air entering the high-temperature radiation heat exchanger 1.

[0033] Furthermore, such as Figure 5 As shown, the following preferred technical solutions are provided:

[0034] An air inlet device 9 is fixedly connected to one side of the flange fixing plate B8. An air-supporting air fan 6 is fixedly connected inside the air inlet device 9. The purpose of this design is that the air-supporting air fan 6 can pressurize the outside cold air and send it into the high-temperature radiant heat exchanger 1 through the air inlet device 9 and the guide pipe 5, so that the cold air can absorb heat and be preheated in the high-temperature radiant heat exchanger 1, thereby improving the combustion effect and reducing fuel consumption.

[0035] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided:

[0036] The insulation section of the inner layer 4 of the lightweight refractory brick is fixedly connected to the insulation layer circulation duct 12. One end of the insulation layer circulation duct 12 is fixedly connected to the waste heat circulation fan 13. The purpose of this design is that when the waste heat circulation fan 13 is started, it draws in the low-temperature medium (such as air at 30-50℃) after the insulation layer has released heat, pressurizes it and sends it into the insulation layer circulation duct 12 from the outlet. The medium enters the insulation layer along the insulation layer circulation duct 12, releases heat (to maintain the temperature of the insulation layer), and then returns to the inlet of the waste heat circulation fan 13 through the return path at the other end of the insulation layer circulation duct 12, where it is pressurized and transported again to complete one cycle.

[0037] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided:

[0038] A spiral heat exchange coil 14 is fixedly connected to the middle of the inner layer 4 of the lightweight refractory brick. A medium-temperature section temperature sensor 15 is fixedly connected to one side of the surface of the spiral heat exchange coil 14. The purpose of this design is that the spiral heat exchange coil 14 can absorb the heat of the medium-temperature flue gas to heat the internal heat exchange oil. The medium-temperature section temperature sensor 15 can monitor the surface temperature of the coil, so that personnel can grasp the heat exchange situation in the medium-temperature section, judge whether the heat absorption of the heat exchange oil is normal, and ensure the safe and efficient operation of the coil.

[0039] Furthermore, such as Figure 5 As shown, the following preferred technical solutions are provided:

[0040] An electric rotary opening and closing structure 10 is fixedly connected to one side of the air intake device 9, and a support base 16 is fixedly connected to the bottom of the air intake device 9. The purpose of this design is that the electric rotary opening and closing structure 10 can adjust the opening of the air inlet of the air intake device 9 according to actual needs, and accurately control the amount of air entering. The support base 16 can provide stable support for the air intake device 9 and ensure the stability of the device during operation.

[0041] Working Principle: When the device starts up, the combustion air fan 6 delivers cold outside air through the air inlet device 9 and the guide pipe 5 into the high-temperature radiant heat exchanger 1. The electrically operated rotary opening and closing structure 10 adjusts the opening of the air inlet to control the air volume. The high-temperature radiant heat exchanger 1 preheats the air, while the high-temperature section temperature sensor 11 monitors the temperature of the incoming flue gas. During the flow, the flue gas passes sequentially through the high-temperature radiant heat exchanger 1 and the spiral heat transfer oil heat exchange coil 14, exchanging heat with the air and heat transfer oil respectively. The medium-temperature section temperature sensor 15 monitors the surface temperature of the coil to understand the medium-temperature heat exchange situation. The flue gas then enters the low-temperature section, where the waste heat circulation fan 13 drives the hot air to circulate within the insulation layer circulation duct 12, utilizing the low-temperature waste heat to maintain the insulation layer temperature. Finally, the flue gas exhaust fan 203 discharges the low-temperature flue gas through the exhaust pipe 201 and the exhaust outlet 202. The low-temperature section temperature sensor 204 monitors the exhaust temperature. All components work together to achieve efficient heat exchange and precise regulation.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[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 duplex energy-saving heat exchange structure for a melting and holding furnace, comprising a high-temperature radiant heat exchanger (1) and a flue gas exhaust assembly (2), characterized in that: The high-temperature radiant heat exchanger (1) is internally fixedly connected to an aluminum silicate fiber insulation blanket (3). The inner wall of the aluminum silicate fiber insulation blanket (3) is fixedly connected to a lightweight refractory brick inner layer (4). The low-temperature section inside the lightweight refractory brick inner layer (4) is fixedly connected to a smoke exhaust assembly (2). The smoke exhaust assembly (2) includes a smoke exhaust pipe (201). One end of the smoke exhaust pipe (201) is connected to a smoke exhaust outlet (202). A flue gas induced draft fan (203) is fixedly connected to the middle of one end of the smoke exhaust outlet (202). A low-temperature section temperature sensor (204) is fixedly connected to one side of the surface of the smoke exhaust pipe (201).

2. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 1, characterized in that: A flow guide pipe (5) is fixedly connected to one side of the high-temperature radiant heat exchanger (1), and a high-temperature section temperature sensor (11) is fixedly connected inside the flow guide pipe (5).

3. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 2, characterized in that: A flange fixing plate A (7) is fixedly connected to one side of the flow guide pipe (5), and a flange fixing plate B (8) is fixedly connected to one side of the flange fixing plate A (7).

4. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 3, characterized in that: An air inlet device (9) is fixedly connected to one side of the flange fixing plate B (8), and a combustion air fan (6) is fixedly connected inside the air inlet device (9).

5. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 1, characterized in that: The insulation section of the inner layer (4) of the lightweight refractory brick is fixedly connected to the insulation layer circulation duct (12), and one end of the insulation layer circulation duct (12) is fixedly connected to the waste heat circulation fan (13).

6. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 1, characterized in that: A spiral heat exchange coil (14) is fixedly connected to the middle of the inner layer (4) of the lightweight refractory brick, and a medium-temperature sensor (15) is fixedly connected to one side of the surface of the spiral heat exchange coil (14).

7. The duplex energy-saving heat exchange structure of a melting and holding furnace according to claim 4, characterized in that: An electric rotary opening and closing structure (10) is fixedly connected to one side of the air inlet device (9), and a support base (16) is fixedly connected to the bottom of the air inlet device (9).

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