Heating furnace system

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By adopting methanol gasification device and gas-liquid separation device in the heating furnace system, the combustion instability and pollution of liquid fuels is solved, and an efficient and environmentally friendly combustion process is achieved, reducing pollutant emissions and resource waste.

CN222279312UActive Publication Date: 2024-12-31SHANGHAI HOYON ENG CO LTD

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202421049668.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-14
Publication Date: 2024-12-31
Estimated Expiration: 2034-05-14

AI Technical Summary

Technical Problem

When burning liquid oil, existing heating furnaces have problems such as instability in combustion, incomplete combustion and excessive emissions of gaseous pollutants, and rely on precious natural gas or liquefied gas combustion, resulting in waste of resources and pollution.

Method used

A heating furnace system was designed, using methanol gasification device to vaporize liquid methanol into gaseous fuel, and the combustion process was optimized through the gas-liquid separation device and air preheater to ensure the stability and efficiency of combustion and reduce pollutant emissions. .

Benefits of technology

Through methanol gasification combustion, the instability and incomplete combustion of liquid fuel combustion are solved, pollutant emissions are reduced, fossil resources are saved, the thermal efficiency of the heating furnace is improved, and zero-emission SO2 is achieved, reducing the device running costs.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN222279312U_ABST

Patent Text Reader

Abstract

The application discloses a heating furnace system, comprising: a heating furnace comprising a burner; the methanol gasification device is used for gasifying liquid methanol; an inlet of the gas-liquid separation device is communicated with an outlet of the methanol gasification device through a pipeline, and a gaseous medium outlet of the gas-liquid separation device is communicated with a fuel gas inlet of the combustor through a pipeline; and the air preheater is used for heat exchange between flue gas from the heating furnace and air, and an air outlet of the air preheater is communicated with a combustion-supporting air inlet of the combustor. According to the heating furnace system, fossil resources can be effectively saved, emission of pollutants is reduced, and the problem of low-temperature dew point corrosion of petrochemical equipment is fundamentally solved.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to the field of petrochemical technology, and in particular to a heating furnace system. Background Art

[0002] The heating furnace is the main heat supply equipment for petrochemical and chemical plants, and a major energy consumer within the plant. Its working principle is to use the heat generated by fuel combustion to heat the process medium, accompanied by the generation of a large amount of flue gas. Therefore, the process heating furnace is also the main source of atmospheric pollutant emissions in petrochemical plants.

[0003] Due to pollutant emissions and incomplete combustion factors, heating furnaces that burn liquid oil have basically disappeared. At present, heating furnaces basically use gas fuels. When they are insufficient, they need to purchase natural gas or liquefied gas to supplement. my country is poor in oil and gas. Natural gas is a non-renewable resource and is relatively precious. When liquefied gas is used for combustion, its heavy components make it difficult to control the combustion, resulting in unstable combustion and excessive emissions of gaseous pollutants.

[0004] Therefore, improvements are needed to at least partially solve the above problems. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above problems, according to the utility model, a heating furnace system is provided, which includes:

[0007] A heating furnace, the heating furnace comprising a burner;

[0008] Methanol gasification device, used to gasify liquid methanol;

[0009] A gas-liquid separation device, wherein the inlet of the gas-liquid separation device is connected to the outlet of the methanol gasification device through a pipeline, and the gaseous medium outlet of the gas-liquid separation device is connected to the fuel gas inlet of the burner through a pipeline;

[0010] An air preheater is used for heat exchange between the flue gas from the heating furnace and the air, wherein the air outlet of the air preheater is connected to the combustion air inlet of the burner.

[0011] Exemplarily, the heating furnace system further comprises a heating belt, which is wound around a pipeline between the gaseous medium outlet of the gas-liquid separation device and the fuel gas inlet of the burner.

[0012] Exemplarily, the methanol gasification device includes a gas-liquid heat exchanger;

[0013] The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney;

[0014] The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the exhaust port of the heating furnace, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the induced draft fan;

[0015] The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, the smoke outlet of the air preheater is connected to the inlet of the induced draft fan, and the air inlet of the air preheater is connected to the outlet of the blower;

[0016] The inlet of the methanol delivery pump is connected to the liquid methanol supply device;

[0017] The inlet of the blower is connected to the air suction port;

[0018] The outlet of the induced draft fan is communicated with the chimney.

[0019] Exemplarily, a flue gas flow regulating device is provided at the gaseous medium inlet of the gas-liquid heat exchanger and the flue gas inlet of the air preheater.

[0020] Exemplarily, the methanol gasification device includes a gas-liquid heat exchanger;

[0021] The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney;

[0022] The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the flue gas outlet of the air preheater, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the induced draft fan;

[0023] The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, and the air inlet of the air preheater is connected to the outlet of the blower;

[0024] The inlet of the methanol delivery pump is connected to the liquid methanol supply device;

[0025] The inlet of the blower is connected to the air suction port;

[0026] The outlet of the induced draft fan is communicated with the chimney.

[0027] Exemplarily, the methanol gasification device includes a gas-liquid heat exchanger;

[0028] The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney;

[0029] The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the exhaust port of the heating furnace, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the flue gas inlet of the air preheater;

[0030] The smoke outlet of the air preheater is communicated with the inlet of the induced draft fan, and the air inlet of the air preheater is communicated with the outlet of the blower;

[0031] The inlet of the methanol delivery pump is connected to the liquid methanol supply device;

[0032] The inlet of the blower is connected to the air suction port;

[0033] The outlet of the induced draft fan is communicated with the chimney.

[0034] Exemplarily, the methanol gasification device includes a gas-liquid heat exchanger;

[0035] The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney;

[0036] The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, and the gas medium inlet of the gas-liquid heat exchanger is communicated with an external gas supply device;

[0037] The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, the smoke outlet of the air preheater is connected to the inlet of the induced draft fan, and the air inlet of the air preheater is connected to the outlet of the blower;

[0038] The inlet of the methanol delivery pump is connected to the liquid methanol supply device;

[0039] The inlet of the blower is connected to the air suction port;

[0040] The outlet of the induced draft fan is communicated with the chimney.

[0041] Exemplarily, the methanol gasification device further includes a gas-liquid separator, and the liquid medium outlet of the gas-liquid heat exchanger is connected to the inlet of the gas-liquid separation device through the gas-liquid separator.

[0042] Exemplarily, the liquid medium outlet of the gas-liquid separation device is connected to the inlet of the gas-liquid heat exchanger or the inlet of the methanol delivery pump.

[0043] Exemplarily, the gas-liquid separation device is a gas-liquid separator or a cyclone separator.

[0044] Compared with the prior art, the above technical solution has the following beneficial effects:

[0045] 1. Using methanol as fuel after gasification solves the defects of liquid fuel combustion, such as cumbersome control and difficulty in full and complete combustion, and eliminates factors such as unstable and incomplete combustion of liquid fuel;

[0046] 2. Methanol is abundant and a renewable resource. Methanol as a fuel can effectively save fossil resources;

[0047] 3. Methanol is an internationally recognized clean fuel. Methanol components are clean and do not contain sulfur, nitrogen and other elements. As a fuel, it can reduce the emission of pollutants, among which SO2 can achieve zero emission, fundamentally solve the low-temperature dew point corrosion problem of petrochemical equipment, and create the prerequisite for improving the thermal efficiency of heating furnaces;

[0048] 4. It solves the problem of heat exchange temperature difference in conventional waste heat recovery system and can effectively improve the thermal efficiency of heating furnace;

[0049] 5. Solve the problem of liquid combustion of general gasified fuel, ensuring combustion reliability and device operation reliability;

[0050] 6. It can utilize low-temperature heat sources that are extremely difficult to use in the device, saving energy and reducing consumption, which has great economic value;

[0051] 7. The methanol gasification unit is a gas-liquid heat exchange unit. Compared with gas-to-gas heat exchange, it has a high heat transfer coefficient, small equipment, small footprint, and low investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The following drawings of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the device and principle of the present application. In the drawings,

[0053] Figure 1 is a schematic structural block diagram of a heating furnace system according to a first embodiment of the present application;

[0054] Figure 2 is a schematic structural block diagram of a heating furnace system according to a second embodiment of the present application;

[0055] Figure 3 is a schematic structural block diagram of a heating furnace system according to a third embodiment of the present application;

[0056] Figure 4 It is a schematic structural block diagram of a heating furnace system according to the fourth embodiment of the present application.

[0057] Description of reference numerals:

[0058] 1-heating furnace, 101-burner, 2-methanol gasification device, 201-gas-liquid heat exchanger, 202-gas-liquid separator, 3-methanol delivery pump, 4-induced draft fan, 5-air inlet, 6-blower, 7-air preheater, 8-chimney, 9-gas-liquid separation device, 10-heating belt, 11-flue gas flow regulating device, 12-flue gas flow regulating device, 13-flue gas flow regulating device. DETAILED DESCRIPTION

[0059] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0060] It should be understood that the present application can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present application to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0061] It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer or part discussed below can be represented as a second element, component, region, layer or part.

[0062] Spatially relative terms such as "below", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one element or feature to other elements or features shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation shown in the figures.

[0063] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0064] See attached Figure 1 The heating furnace 1 system according to the first embodiment of the present application is exemplarily described. The heating furnace 1 system comprises a heating furnace 1 , a methanol gasification device 2 , a gas-liquid separation device 9 and an air preheater 7 .

[0065] The heating furnace 1 can be a tubular heating furnace 1, such as a box furnace, a vertical furnace, a cylindrical furnace, a large square furnace, etc. The heating furnace 1 can include a burner 101, a radiation chamber and a convection chamber. The fuel is ejected from the burner 101 and burned to generate a high-temperature flame and a high-temperature flue gas. The high-temperature flame transfers heat to the furnace tube in the radiation chamber by radiation, and then to the medium in the furnace tube, thereby heating the medium. After heat exchange in the radiation chamber, the high-temperature flue gas enters the convection chamber, transfers heat to the furnace tube in the convection chamber by convection, and then to the medium in the furnace tube. The burner 101 can be a gas burner 101, which has a fuel gas inlet and a combustion-supporting air inlet.

[0066] The methanol gasification device 2 is used to gasify liquid methanol to turn it into gaseous methanol. Methanol is a liquid at room temperature, and its boiling point is 60°C to 70°C at normal pressure. Even if it is pressurized to 0.2 to 0.6 MPa, its boiling point is only between 90 and 120°C. The gaseous methanol obtained after the gasification of liquid methanol can be used as fuel gas, and its combustion mode is similar to that of gaseous fuel, which can solve the problems existing in the combustion of liquid fuel, that is, it solves the defects of cumbersome liquid fuel combustion control and difficulty in full and complete combustion from the source, and eliminates the factors such as unstable and incomplete combustion of liquid fuel.

[0067] The inlet of the gas-liquid separation device 9 is connected to the outlet of the methanol gasification device 2 through a pipeline, and the gaseous medium outlet of the gas-liquid separation device 9 is connected to the fuel gas inlet of the burner 101 through a pipeline. The gas-liquid separation device 9 can perform gas-liquid separation on the gaseous methanol from the methanol gasification device 2, and the separated gaseous methanol is provided to the burner 101 for combustion. The setting of the gas-liquid separation device 9 can effectively avoid the problem of gaseous methanol burning with liquid, and ensure the combustion reliability and device operation reliability. Methanol is abundant in source and is a renewable resource. Methanol as a fuel can effectively save fossil resources. And methanol is an internationally recognized clean fuel. Methanol components are clean and do not contain elements such as sulfur and nitrogen. As a fuel, it can reduce the emission of pollutants, among which SO2 can achieve zero emission, fundamentally solve the problem of low-temperature dew point corrosion of petrochemical equipment, and create prerequisites for the heating furnace 1 to improve thermal efficiency.

[0068] The air preheater 7 is used for heat exchange between the flue gas from the heating furnace 1 and the air, and the air outlet of the air preheater 7 is connected to the combustion air inlet of the burner 101. That is, the setting of the air preheater 7 can effectively recycle the flue gas from the heating furnace 1 to preheat the combustion air, thereby improving the thermal efficiency of the heating furnace 1. Exemplarily, the air preheater 7 can be a plate heat exchanger or a shell and tube heat exchanger.

[0069] Specifically, in this embodiment, the methanol gasification device 2 includes a gas-liquid heat exchanger 201 and a gas-liquid separator 202. The heating furnace 1 system also includes a methanol delivery pump 3, a blower 6, an induced draft fan 4, an air suction port 5 and a chimney 8. The liquid medium inlet of the gas-liquid heat exchanger 201 is connected to the outlet of the methanol delivery pump 3, and the liquid medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the gas-liquid separation device 9 through the gas-liquid separator 202. The gaseous medium inlet of the gas-liquid heat exchanger 201 is connected to the exhaust port of the heating furnace 1, and the gaseous medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the induced draft fan 4. The smoke inlet of the air preheater 7 is connected to the exhaust port of the heating furnace 1, the smoke outlet of the air preheater 7 is connected to the inlet of the induced draft fan 4, the air inlet of the air preheater 7 is connected to the outlet of the blower 6, and the air outlet of the air preheater 7 is connected to the combustion air inlet of the burner 101. The inlet of the methanol delivery pump 3 is connected to the liquid methanol supply device, which can be a liquid methanol storage tank. The inlet of the blower 6 is connected to the air suction port 5. The outlet of the induced draft fan 4 is connected to the chimney 8.

[0070] The air in the environment enters the combustion air inlet of the burner 101 through the air inlet 5, the blower 6 and the air preheater 7 in turn; the liquid methanol from the liquid methanol supply device enters the fuel gas inlet of the burner 101 through the methanol delivery pump 3, the gas-liquid heat exchanger 201, the gas-liquid separator 202 and the gas-liquid separation device 9 in turn; the flue gas from the heating furnace 1 exchanges heat with the air and liquid methanol in the air preheater 7 and the gas-liquid heat exchanger 201 respectively, and then is discharged through the chimney 8 through the induced draft fan 4. The liquid methanol exchanges heat with the flue gas in the gas-liquid heat exchanger 201 to achieve gasification. For example, the gasification pressure of methanol is controlled at 0.2MPa to 0.6MPa, providing sufficient power for the subsequent pipeline; the gasification temperature of methanol is controlled at 90℃ to 120℃, maximizing the use of the low temperature of methanol for heat exchange. The gas-liquid separator 202 and the gas-liquid separation device 9 can perform gas-liquid separation twice on the gaseous methanol to achieve a better gas-liquid separation effect.

[0071] For a general heating furnace 1 system, the waste heat recovery system uses combustion air to exchange heat with the flue gas generated by combustion. The air temperature will increase as the flue gas temperature further decreases until the temperature difference at the ends is close, resulting in a heat exchange bottleneck. The cost or investment of further heat exchange is very huge. However, methanol gasification involves a phase change process, which has a very large latent heat consumption. In this embodiment, liquid methanol is used as a cold source to participate in the heat exchange and cooling of the flue gas, which can effectively eliminate the above-mentioned heat exchange bottleneck problem, easily reduce the exhaust temperature of the heating furnace 1 to below 100°C, and improve the thermal efficiency of the heating furnace 1.

[0072] Exemplarily, the gas-liquid heat exchanger 201 may be a shell and tube heat exchanger. The gas-liquid separator 202 may perform gas-liquid separation by any one or more of gravity sedimentation, baffle separation, centrifugal separation, screen separation, ultrafiltration separation, and packing separation. In some embodiments, the gas-liquid separator 202 may not be provided in the methanol gasification device 2, and the liquid medium outlet of the gas-liquid heat exchanger 201 is directly connected to the inlet of the gas-liquid separation device 9. The gas-liquid separation device 9 may be a gas-liquid separator, which may perform gas-liquid separation by gravity sedimentation, which may prevent liquid inclusion caused by heat dissipation of a long connecting pipeline and may also play a buffering role. In some embodiments, the gas-liquid separation device 9 may also be a cyclone separator or other devices known to those skilled in the art that can perform gas-liquid separation. Exemplarily, the liquid medium outlet of the gas-liquid separation device 9 may be connected to the inlet of the gas-liquid heat exchanger 201 or the inlet of the methanol delivery pump 3, so that the liquid methanol separated by the gas-liquid separation device 9 can re-enter the gas-liquid heat exchanger 201 for gasification.

[0073] In this embodiment, the heating furnace 1 system further includes a heating belt 10, which is wound around the pipeline between the gaseous medium outlet of the gas-liquid separation device 9 and the fuel gas inlet of the burner 101, and further heats the gaseous methanol in the pipeline at a constant temperature to ensure that its temperature is above the boiling point, eliminate the phenomenon of liquid inclusion, and ensure the combustion reliability and device operation reliability. The heating belt 10 can be an electric heating belt or other belt-shaped heating device.

[0074] In this embodiment, a flue gas flow regulating device 13 and a flue gas flow regulating device 12 are respectively provided at the gas medium inlet of the gas-liquid heat exchanger 201 and the flue gas inlet of the air preheater 7. The flue gas flow regulating device 13 and the flue gas flow regulating device 12 are respectively used to regulate the flue gas volume entering the gas-liquid heat exchanger 201 and the air preheater 7, so as to effectively control the gasification volume of methanol and ensure the gasification effect of methanol. Exemplarily, the flue gas flow regulating device 13 and the flue gas flow regulating device 12 can be flue baffles.

[0075] In this embodiment, the exhaust port of the heating furnace 1 is also connected to the chimney 8 through a flue, and a flue gas flow regulating device 11 is provided on the flue near the chimney 8. The flue gas flow regulating device 11 is used to regulate the amount of flue gas entering the chimney 8 from the exhaust port of the heating furnace 1. The flue gas flow regulating device 11 can assist in regulating the amount of flue gas entering the gas-liquid heat exchanger 201 and the air preheater 7.

[0076] See attached Figure 2 The heating furnace 1 system according to the second embodiment of the present application is exemplified. The heating furnace 1 system includes a heating furnace 1, a methanol gasification device 2, a gas-liquid separation device 9, an air preheater 7, a methanol delivery pump 3, a blower 6, an induced draft fan 4, an air inlet 5, a chimney 8 and a flue gas flow regulating device 11 having the same structure as the above-mentioned embodiment, and the description is not repeated here. The heating furnace 1 system of the second embodiment is basically the same as the heating furnace 1 system of the first embodiment, and the difference lies in the connection method of the methanol gasification device 2 and the gas-liquid separator 202.

[0077] Specifically, the liquid medium inlet of the gas-liquid heat exchanger 201 is connected to the outlet of the methanol delivery pump 3, and the liquid medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the gas-liquid separation device 9 through the gas-liquid separator 202. The gaseous medium inlet of the gas-liquid heat exchanger 201 is connected to the flue gas outlet of the air preheater 7, and the gaseous medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the induced draft fan 4. The flue gas inlet of the air preheater 7 is connected to the exhaust port of the heating furnace 1, the air inlet of the air preheater 7 is connected to the outlet of the blower 6, and the air outlet of the air preheater 7 is connected to the combustion air inlet of the burner 101.

[0078] The flue gas from the heating furnace 1 first exchanges heat with the air in the air preheater 7, then enters the gas-liquid heat exchanger 201 to exchange heat with the liquid methanol, and then is discharged through the chimney 8 via the induced draft fan 4. The liquid methanol exchanges heat with the flue gas in the gas-liquid heat exchanger 201 to achieve gasification. For example, the gasification pressure of methanol is controlled at 0.2MPa to 0.6MPa to provide sufficient power for the subsequent pipeline; the gasification temperature of methanol is controlled at 90°C to 120°C to maximize the use of the low temperature of methanol for heat exchange.

[0079] See attached Figure 3 The heating furnace 1 system according to the third embodiment of the present application is exemplified. The heating furnace 1 system includes a heating furnace 1, a methanol gasification device 2, a gas-liquid separation device 9, an air preheater 7, a methanol delivery pump 3, a blower 6, an induced draft fan 4, an air inlet 5, a chimney 8 and a flue gas flow regulating device 11 having the same structure as the above-mentioned embodiment, and the description is not repeated here. The heating furnace 1 system of the third embodiment is basically the same as the heating furnace 1 system of the first embodiment, and the difference lies in the connection method of the methanol gasification device 2 and the gas-liquid separator 202.

[0080] Specifically, the liquid medium inlet of the gas-liquid heat exchanger 201 is connected to the outlet of the methanol delivery pump 3, and the liquid medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the gas-liquid separation device 9 through the gas-liquid separator 202. The gaseous medium inlet of the gas-liquid heat exchanger 201 is connected to the smoke exhaust port of the heating furnace 1, and the gaseous medium outlet of the gas-liquid heat exchanger 201 is connected to the smoke inlet of the air preheater 7. The smoke outlet of the air preheater 7 is connected to the inlet of the induced draft fan 4, the air inlet of the air preheater 7 is connected to the outlet of the blower 6, and the air outlet of the air preheater 7 is connected to the combustion air inlet of the burner 101.

[0081] The flue gas from the heating furnace 1 first exchanges heat with liquid methanol in the gas-liquid heat exchanger 201, then enters the air preheater 7 to exchange heat with air, and then is discharged through the chimney 8 via the induced draft fan 4. Liquid methanol exchanges heat with the flue gas in the gas-liquid heat exchanger 201 to achieve gasification. For example, the gasification pressure of methanol is controlled at 0.2MPa to 0.6MPa to provide sufficient power for subsequent pipelines; the gasification temperature of methanol is controlled at 90°C to 120°C to maximize the use of the low temperature of methanol for heat exchange.

[0082] See attached Figure 4 The heating furnace 1 system according to the fourth embodiment of the present application is exemplarily described. The heating furnace 1 system includes a heating furnace 1, a methanol gasification device 2, a gas-liquid separation device 9, an air preheater 7, a methanol delivery pump 3, a blower 6, an induced draft fan 4, an air inlet 5, a chimney 8 and a flue gas flow regulating device 11 having the same structure as the above-mentioned embodiment, and the description is not repeated here. The heating furnace 1 system of the fourth embodiment is basically the same as the heating furnace 1 system of the first embodiment, and the difference lies in the connection method of the methanol gasification device 2.

[0083] Specifically, the liquid medium inlet of the gas-liquid heat exchanger 201 is connected to the outlet of the methanol delivery pump 3, the liquid medium outlet of the gas-liquid heat exchanger 201 is connected to the inlet of the gas-liquid separation device 9, and the gas medium inlet of the gas-liquid heat exchanger 201 is connected to the external gas supply device (i.e., the external heat source), so that the external gas supply device can provide heat to gasify the methanol. Exemplarily, the external gas supply device can be a steam supply device.

[0084] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0085] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0086] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0087] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0088] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0089] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0090] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0091] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A heating furnace system, characterized in that: include: A heating furnace, the heating furnace comprising a burner; Methanol gasification device, used to gasify liquid methanol; A gas-liquid separation device, wherein the inlet of the gas-liquid separation device is connected to the outlet of the methanol gasification device through a pipeline, and the gaseous medium outlet of the gas-liquid separation device is connected to the fuel gas inlet of the burner through a pipeline; An air preheater is used for heat exchange between the flue gas from the heating furnace and the air, wherein the air outlet of the air preheater is connected to the combustion air inlet of the burner.

2. The heating furnace system according to claim 1, characterized in that: The heating furnace system further comprises a heating belt, which is wound around a pipeline between the gaseous medium outlet of the gas-liquid separation device and the fuel gas inlet of the burner.

3. The heating furnace system according to claim 1, characterized in that: The methanol gasification device includes a gas-liquid heat exchanger; The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney; The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the exhaust port of the heating furnace, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the induced draft fan; The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, the smoke outlet of the air preheater is connected to the inlet of the induced draft fan, and the air inlet of the air preheater is connected to the outlet of the blower; The inlet of the methanol delivery pump is connected to the liquid methanol supply device; The inlet of the blower is connected to the air suction port; The outlet of the induced draft fan is communicated with the chimney.

4. The heating furnace system according to claim 3, characterized in that: A flue gas flow regulating device is provided at the gaseous medium inlet of the gas-liquid heat exchanger and the flue gas inlet of the air preheater.

5. The heating furnace system according to claim 1, characterized in that: The methanol gasification device includes a gas-liquid heat exchanger; The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney; The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the flue gas outlet of the air preheater, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the induced draft fan; The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, and the air inlet of the air preheater is connected to the outlet of the blower; The inlet of the methanol delivery pump is connected to the liquid methanol supply device; The inlet of the blower is connected to the air suction port; The outlet of the induced draft fan is communicated with the chimney.

6. The heating furnace system according to claim 1, characterized in that: The methanol gasification device includes a gas-liquid heat exchanger; The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney; The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, the gaseous medium inlet of the gas-liquid heat exchanger is communicated with the exhaust port of the heating furnace, and the gaseous medium outlet of the gas-liquid heat exchanger is communicated with the flue gas inlet of the air preheater; The smoke outlet of the air preheater is communicated with the inlet of the induced draft fan, and the air inlet of the air preheater is communicated with the outlet of the blower; The inlet of the methanol delivery pump is connected to the liquid methanol supply device; The inlet of the blower is connected to the air suction port; The outlet of the induced draft fan is communicated with the chimney.

7. The heating furnace system according to claim 1, characterized in that: The methanol gasification device includes a gas-liquid heat exchanger; The heating furnace system also includes a methanol delivery pump, a blower, an induced draft fan, an air suction port and a chimney; The liquid medium inlet of the gas-liquid heat exchanger is communicated with the outlet of the methanol delivery pump, the liquid medium outlet of the gas-liquid heat exchanger is communicated with the inlet of the gas-liquid separation device, and the gas medium inlet of the gas-liquid heat exchanger is communicated with an external gas supply device; The smoke inlet of the air preheater is connected to the smoke exhaust port of the heating furnace, the smoke outlet of the air preheater is connected to the inlet of the induced draft fan, and the air inlet of the air preheater is connected to the outlet of the blower; The inlet of the methanol delivery pump is connected to the liquid methanol supply device; The inlet of the blower is connected to the air suction port; The outlet of the induced draft fan is communicated with the chimney.

8. The heating furnace system according to any one of claims 3 to 7, characterized in that: The methanol gasification device further comprises a gas-liquid separator, and the liquid medium outlet of the gas-liquid heat exchanger is connected with the inlet of the gas-liquid separation device through the gas-liquid separator.

9. The heating furnace system according to any one of claims 3 to 7, characterized in that: The liquid medium outlet of the gas-liquid separation device is communicated with the inlet of the gas-liquid heat exchanger or the inlet of the methanol delivery pump.

10. The heating furnace system according to claim 1, characterized in that: The gas-liquid separation device is a gas-liquid separator or a cyclone separator.