Regenerative high temperature and high pressure hot air furnace

Abstract

The present invention relates to a heat storage type high temperature and high pressure hot blast furnace, wherein the outer layer of the furnace body is a composite heat insulation layer of a multi-layer structure, a high temperature heat storage body is arranged inside, the high temperature heat storage body is provided with a high temperature wind channel, an electric heating body inside the heat storage body or an external high temperature heat source heats the high temperature heat storage body, a low temperature wind chamber and a high temperature wind chamber are arranged on both sides of the high temperature heat storage body, external high pressure low temperature wind enters the low temperature wind chamber through an air inlet, enters the high temperature wind chamber after being heated through the high temperature wind channel of the high temperature heat storage body, and is output from a high temperature wind outlet; when the high temperature heat source is arranged externally, heat storage and heat release valves and a high temperature circulation fan are arranged on the air inlet and the high temperature wind outlet pipelines; a cooling source stores corresponding cooling medium, which is input into a cooling liquid pipe wound around the outside of a closed metal shell under the power of a cooling pump to cool the closed metal shell.

Description

Technical Field

[0001] The invention relates to the field of heat storage technology, and in particular to a heat storage type high temperature and high pressure hot blast furnace capable of outputting high temperature and high pressure hot blast. Background Art

[0002] At present, in the field of thermal storage technology, the thermal storage temperature of the thermal storage body is often below 500℃, so the output hot air temperature is generally below 500℃, and the pressure is also mainly a standard atmospheric pressure, and the maximum will not exceed 1MPa. When hot air with a temperature of more than 1000℃ and a pressure of more than 20MPa is required, conventional thermal storage hot air furnaces are often difficult to meet the requirements. Therefore, it is necessary to provide a thermal storage hot air furnace that can produce high temperature and high pressure. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-layer structure of heat storage type high temperature and high pressure hot blast furnace to meet the special parameter requirements in the same field.

[0004] The objective of the present invention is achieved through the following technical scheme: a heat storage type high temperature and high pressure hot air furnace, mainly comprising: an outer protective layer, a carbon fiber wound outer shell layer, a closed metal shell, a high temperature heat storage body, a high temperature wind channel, an air inlet, an electric heating body or a high temperature heat source, a high temperature wind chamber, an interface flange, a high temperature resistant outlet sleeve, a high temperature wind output outlet, a detection and control line access port, a detection and control system, a cooling pump, and a cooling source; characterized in that: a carbon fiber wound outer shell layer, a coolant pipe, a closed metal shell, an elastic fiber insulation layer and a solid insulation layer are sequentially arranged inwardly from the outer protective layer of the furnace body; a coolant pipe is wound around the outside of the closed metal shell, and a carbon fiber wound filling layer is also arranged in the gap between the coolant pipes; a high temperature heat storage body is arranged in the solid insulation layer, and high temperature wind channels are evenly distributed in the axial direction of the high temperature heat storage body, and the high temperature heat storage body is arranged inside. An electric heating body for heating the high-temperature heat storage body or a high-temperature heat source channel connected to the outside; one side of the high-temperature heat storage body is a low-temperature wind chamber, and the other side is a high-temperature wind chamber, the low-temperature wind chamber is connected to an air inlet to the outside, and the high-temperature wind chamber is connected to a high-temperature air outlet to the outside for output; external high-pressure low-temperature wind enters the low-temperature wind chamber through the air inlet, flows through the high-temperature wind channel of the high-temperature heat storage body and enters the high-temperature wind chamber after being heated, and is output from the high-temperature air outlet, a high-temperature resistant outlet sleeve is installed at the high-temperature air outlet, and the external output pipeline is connected to the high-temperature air outlet through an interface flange; when the high-temperature heat source is set externally, heat storage, heat release valves and high-temperature circulation fans are arranged on the air inlet and high-temperature air outlet pipelines; the cooling source stores the corresponding cooling medium, which is input into the coolant pipe outside the closed metal shell for cooling the closed metal shell under the power of the cooling pump.

[0005] The invention comprises: the high temperature heat storage body is composed of a high temperature resistant metal tube bundle or a solid heat storage component with vents, the heat storage capacity and heat release rate meeting the requirements and the melting point being greater than 1500°C.

[0006] The present invention includes: the high-temperature wind channel is a through hole arranged in the high-temperature heat storage body and running through the cross section and distributed in a honeycomb shape.

[0007] The present invention comprises: the carbon fiber winding shell and the carbon fiber winding filling layer have a tensile strength between 3500 and 395000 MPa, and are formed by winding multiple layers of threads or cloth made of carbon fiber with resin as a binder.

[0008] The invention comprises: the elastic fiber heat-insulating layer is made by compressing aluminum silicate aerogel felt and silicon dioxide aluminum aerogel felt.

[0009] The present invention also includes: the electric heating body arranged inside the high-temperature heat storage body or the external high-temperature heat source is a hot air generating device that can heat the temperature value of the high-temperature heat storage body to a temperature value within the required accuracy range of the heat release output hot air temperature value.

[0010] The advantages of the present invention are: in the treatment of the heat preservation structure, a multi-layer, multi-style integrated design scheme is adopted, and the elastic fiber heat preservation layer and the solid heat preservation layer composite heat insulation layer are cleverly used to reduce the heat radiation of the high-temperature heat storage body with a temperature above 1000°C to the closed metal shell; the coolant pipeline arranged on the outer layer of the metal shell absorbs the dissipated radiation heat of the high-temperature heat storage body penetrating the elastic fiber heat preservation layer and the solid heat preservation layer, so that the working temperature of the metal shell is lower than 80°C; the temperature of the high-temperature heat storage body above 1000°C will not cause the temperature of the metal shell to exceed 200°C and reduce the compressive strength of the metal shell, and the hot air output of 45MPa high pressure and 1250°C high temperature can be achieved. The solid heat preservation layer is outside the high-temperature heat storage body, and the solid material with high strength and low thermal conductivity is adopted, which can withstand high temperature and have strength at the same time; the aluminum silicate aerogel felt with high heat preservation performance is filled between the solid heat preservation layer and the closed metal shell as the heat preservation layer, which further increases the heat preservation effect. Since the gas circulating inside is above tens of MPa, the airtightness of the equipment structure is also highly required, so a metal shell of a certain thickness is provided to ensure its airtightness; since the internal pressure is solely supported by a metal shell structure such as steel, the thickness of the shell will be very large, which increases the difficulty of processing and increases the weight. Therefore, a new type of material, carbon fiber material, is used on the outside of steel and other metal shells to increase the bearing pressure. The carbon fiber material is light in weight, but its pressure bearing capacity is more than ten times that of steel and other metal materials of the same thickness. At the same time, its elastic modulus is almost exactly the same as that of steel, and it can be well combined with steel and other metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a schematic diagram of the facade structure of the wide-body structure of the present invention.

[0012] Figure 2 for Figure 1 A schematic diagram of the structure from a top view of the medium-wide body structure.

[0013] Figure 3 A schematic diagram of the elevation structure of the narrow body structure of the present invention.

[0014] Figure 4 for Figure 3 Schematic diagram of the left-side structure of the medium narrow body structure.

[0015] Figure 5 A schematic diagram of the vertical structure of the narrow-body external heat source of the present invention.

[0016] Figure 6 for Figure 5 Schematic diagram of the left side structure of the external heat source of the medium narrow body structure.

[0017] The main components in the series of drawings are described as follows: 1. Outer protective layer, 2. Carbon fiber wound shell, 3. Carbon fiber wound filling layer, 4. Sealed metal shell, 5. Elastic fiber insulation layer, 6. Solid insulation layer, 7. High-temperature heat storage body, 8. High-temperature wind channel, 9. Air inlet, 10. Low-temperature wind chamber, 11. Maintenance manhole, 12. Electric heating body, 13. Coolant pipe, 14. High-temperature wind chamber, 15. Interface flange, 16. High-temperature resistant outlet sleeve, 17. High-temperature air outlet, 18. Maintenance port, 19. Inspection and control line connection port, 20. Inspection and control system, 21. Cooling pump, 22. Cooling source, 23. Sealed insulated electrode, 24. High-temperature heat source, 25. High-temperature circulation fan, 26. Heat storage valve, 27. Heat release valve.

[0018] The series of drawings are merely schematic diagrams of implementation cases of the present invention. A person skilled in the art can obtain other drawings based on these drawings without any creative work. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described in detail below in conjunction with a series of drawings. The following description is only for demonstration and explanation and does not limit the present invention in any form.

[0020] Example 1: Figure 1 , Figure 2As shown, this scheme is a wide-body structure. The outer protective layer 1 of the outermost layer of the furnace body is sequentially arranged inwardly with a carbon fiber wound shell 2, a sealed metal shell 4, an elastic fiber insulation layer 5 and a solid insulation layer 6, which together form a structural outer shell that can withstand high temperature and high pressure; a coolant pipe 13 is wound around the outside of the sealed metal shell 4, and a carbon fiber wound filling layer 3 is arranged in the gap of the coolant pipe 13. The cooling source 22 stores the corresponding cooling medium, which is input into the coolant pipe 13 wound around the outside of the sealed metal shell 4 under the power of the cooling pump 21, so as to cool the sealed metal shell 4; The elastic fiber insulation layer 5 is made of aluminum silicate aerogel felt and silicon dioxide aluminum aerogel felt by compression; the carbon fiber winding shell 2 and the carbon fiber winding filling layer 3 are made of carbon fiber silk or cloth with epoxy resin as a binder and wound in multiple layers, and the tensile strength is between 3500 and 395000 MPa; a high-temperature heat storage body 7 is arranged in the solid insulation layer 6, and the high-temperature heat storage body 7 is composed of a high-temperature resistant metal pipe bundle or a solid component with a vent hole whose heat storage capacity and heat release rate meet the requirements and whose melting point is greater than 1500°C. There are high-temperature air passages 8 with honeycomb-shaped through holes. Several layers are arranged horizontally in the high-temperature heat storage body 7, and multiple groups of electric heating bodies 12 are arranged on each layer to heat the high-temperature heat storage body 7 and store heat. The electric heating body 12 can heat the temperature value of the high-temperature heat storage body to the required accuracy range of the temperature value of the heat-released output hot air. The low-temperature air chamber 10 is located at the lower part of the high-temperature heat storage body 7. The low-temperature air chamber 10 is connected to the outside with an air inlet 9, a maintenance manhole 11 and a control line connection port 19. When wiring and repairing the equipment, personnel can enter the low-temperature air chamber 10 through the maintenance manhole 11. The inspection port 18 is used to enter the interior of the equipment for work, and various inspection and control lines are finally connected to the inspection and control system 20 through the inspection and control line connection port 19; the high-temperature air chamber 14 is located on the upper part of the high-temperature heat storage body 7, and is connected to the outside with a high-temperature air outlet 17; the external high-pressure low-temperature air enters the low-temperature air chamber 10 through the air inlet 9, flows through the high-temperature air channel 8 in the high-temperature heat storage body 7, and enters the high-temperature air chamber 14 after being heated, and is output from the high-temperature air outlet 17. There is a high-temperature resistant outlet sleeve 16 at the outlet of the high-temperature air chamber 14, and the high-temperature air outlet 17 is connected to the equipment through an interface flange 15. The inner diameter of the closed metal shell 4 in the embodiment 1 of the wide-body structure can be designed to be greater than 2500mm. In addition to the manual operation space of Φ1200mm for installing the electric heating body 12, the remaining 650mm annular space is reserved for installing the elastic fiber insulation layer 5, the solid insulation layer 6 and the high-temperature heat storage body 7. It is convenient to increase the thickness of the insulation layer to improve the insulation effect or increase the weight of the high-temperature heat storage body 7 to improve the heat storage capacity. The wide-body structure is suitable for users with high-power heat storage and continuous high-temperature and high-pressure hot air output.

[0021] Example 2: Figure 3 , Figure 4As shown, this scheme is a narrow body structure. The outer protective layer 1 of the outermost layer of the furnace body is sequentially arranged inwardly with a carbon fiber wound shell 2, a closed metal shell 4, an elastic fiber insulation layer 5 and a solid insulation layer 6, which together form a structural outer shell that can withstand high temperature and high pressure; a coolant pipe 13 is wound around the outside of the closed metal shell 4, and a carbon fiber wound filling layer 3 is arranged in the gap between the coolant pipe 13. The corresponding cooling medium is stored in the cooling source 22, and is input into the coolant pipe 13 wound around the outside of the closed metal shell 4 under the power of the cooling pump 21, so as to cool the closed metal shell 4; the elastic fiber insulation layer 5 is made of aluminum silicate aerogel felt and silicon dioxide aluminum aerogel felt by compression; the carbon fiber wound shell 2 and the carbon fiber wound filling layer 3 are made of carbon fiber silk or cloth with epoxy resin as a binder and wound in multiple layers, with a tensile strength of 13500. 395000MPa; the high-temperature wind channel 8 arranged axially in the high-temperature heat storage body 7 in the solid insulation layer 6 is a honeycomb-shaped through hole, and the high-temperature heat storage body 7 is composed of a high-temperature resistant metal tube bundle or a solid component with vents whose heat storage capacity and heat release speed meet the requirements and whose melting point is greater than 1500℃; the high-temperature heat storage body 7 is heated by an electric heating body 12 surrounded by the high-temperature heat storage body 7 at the geometric center of the furnace body, and the electric heating body 12 can heat the temperature value of the high-temperature heat storage body to the required range of the accuracy of the heat release output hot air temperature value; at one end of the high-temperature heat storage body 7 is a low-temperature wind chamber 10, The warm air chamber 10 is connected to the outside with an air inlet 9, and the other end is a high temperature air chamber 14, which is connected to the outside with a high temperature air outlet 17; the external high pressure low temperature air enters the low temperature air chamber 10 through the air inlet 9, flows through the high temperature air channel 8 in the high temperature heat storage body 7, and enters the high temperature air chamber 14 after being heated, and is output from the high temperature air outlet 17. There is a high temperature resistant outlet sleeve 16 at the outlet of the high temperature air chamber 14, and the high temperature air outlet 17 is connected to the equipment through the interface flange 15; the electric heating body 12 is led out of the furnace body through the sealed insulating electrode 23, and is finally connected to the inspection and control system 20 through the inspection and control line connection port 19 with other various inspection and control lines. The electric heating body 12 stops heating when the temperature value heated by the high temperature heat storage body 7 is equal to the hot air temperature value accuracy required by the user. The inner diameter of the closed metal shell 4 in the embodiment 2 of the narrow body structure can be designed to be between 400㎜ and 1000㎜, that is, there is no space left in the middle for manual operation, and all the space used to install the elastic fiber insulation layer 5, the solid insulation layer 6, the high-temperature heat storage body 7 and the electric heating body 12 is smaller than that of the wide body structure. If the thickness of the insulation layer is not less than 100㎜, and the diameter of the electric heating body 12 is about 60㎜, the annular space for installing the high-temperature heat storage body 7 is 70㎜~370㎜. It can be seen that the weight of the high-temperature heat storage body 7 cannot be installed too much. The narrow body structure is suitable for users with smaller heat storage power and longer heat storage time, and who need flexible and convenient conversion between heat storage and heat release.

[0022] Example 3: Figure 5 , Figure 6As shown, this scheme is a narrow body structure combined with an external heat source structure. In this scheme, heat storage and heat release are time-sharing operation modes. A high-temperature heat source 24 is built externally, and the high-temperature heat source 24 is connected to the air inlet 9 and the high-temperature air outlet 17 of the heat storage furnace body through a high-temperature circulation fan 25 and a heat storage valve 26. At the same time, a heat release valve 27 is provided on the air inlet 9 and the high-temperature air outlet 17. The external high-temperature heat source 24 can heat the temperature value of the high-temperature heat storage body to within the accuracy requirement range of the heat release output hot air temperature value. The outer protective layer 1 of the outermost layer of the furnace body is provided with a carbon fiber wound shell 2, a closed metal shell 4, an elastic fiber insulation layer 5 and a solid insulation layer 6 in sequence, which together form a structural outer shell that can withstand high temperature and high pressure; a coolant pipe 13 is wound around the outside of the closed metal shell 4, and a carbon fiber wound filling layer 3 is arranged in the gap of the coolant pipe 13. The corresponding cooling medium is stored in the cooling source 22, which is input into the coolant pipe 13 wound around the outside of the closed metal shell 4 under the power of the cooling pump 21, so as to cool the closed metal shell 4; the elastic fiber insulation layer 5 is made of aluminum silicate aerogel felt. , silicon dioxide aluminum aerogel felt is compressed; the carbon fiber winding shell 2 and the carbon fiber winding filling layer 3 are made of carbon fiber silk or cloth with epoxy resin as a binder and are wound in multiple layers, and the tensile strength is between 3500 and 395000 MPa; a high-temperature heat storage body 7 is arranged in the solid insulation layer 6, and the high-temperature heat storage body 7 is composed of a high-temperature resistant metal pipe bundle or a solid component with vents that meets the requirements of heat storage capacity and heat release rate and has a melting point greater than 1500°C. A high-temperature wind channel 8 with honeycomb through holes distributed along the axial direction is arranged in the high-temperature heat storage body 7; a low-temperature wind chamber 10 is provided at one end of the high-temperature heat storage body 7. The low-temperature air chamber 10 is connected to the outside with an air inlet 9, and the other end is a high-temperature air chamber 14, which is connected to the outside with a high-temperature air outlet 17; when storing heat, all heat release valves 27 are closed and all heat storage valves 26 are opened. Under the power of the high-temperature circulation fan 25, the high-temperature hot air of the high-temperature heat source 24 passes through the high-temperature air chamber 14 and the high-temperature air channel 8 and is stored in the high-temperature heat storage body 7. The low-temperature heat energy wind after cooling flows back to the high-temperature circulation fan 25 through the low-temperature air chamber 10 and the air inlet 9 to circulate. When the high-temperature heat source 24 heats the temperature value of the high-temperature heat storage body to the required range of the accuracy of the heat release output hot air temperature value, the high-temperature heat energy wind flows back to the high-temperature circulation fan 25 to circulate. When the high-temperature heat source 24 is inside, the heat storage work is stopped; when releasing heat, all heat release valves 27 are opened and all heat storage valves 26 are closed, and the external high-pressure low-temperature air enters the low-temperature air chamber 10 through the air inlet 9, flows through the high-temperature air channel 8 in the high-temperature heat storage body 7 and enters the high-temperature air chamber 14 after being heated, and is output from the high-temperature air outlet 17. There is a high-temperature resistant outlet sleeve 16 at the outlet of the high-temperature air chamber 14, and the high-temperature air outlet 17 is connected to the equipment through the interface flange 15; various inspection and control lines on the furnace body equipment are finally connected to the inspection and control system 20 through the inspection and control line connection port 19 and various inspection and control lines on the high-temperature heat source 24.In the embodiment 3 of the narrow body structure combined with the external heat source structure, the inner diameter of the closed metal shell 4 can be designed to be between 300㎜ and 700㎜, leaving no space for installing manual operation and the electric heating body 12, and all of it is used to install the elastic fiber insulation layer 5, the solid insulation layer 6 and the high-temperature heat storage body 7. The space for installing the high-temperature heat storage body 7 is smaller than that of the wide body structure and larger than that of the narrow body structure. If the thickness of the insulation layer is not less than 100㎜, the space for installing the high-temperature heat storage body 7 is Φ100㎜~Φ500㎜. In the heat storage operation of embodiment 3, the external high-temperature heat source 24 heats the high-temperature heat storage body 7 with hot air equal to the output temperature. During the heat storage process, when it is detected that the circulating hot air temperature flowing through the high-temperature air chamber 14 is equal to that of the low-temperature air chamber 10, and is within the error range of the output high-temperature and high-pressure hot air temperature value, the heat storage ends. In the heat release state, since there is no electric heating to supplement the heat energy, the narrow body structure combined with the external heat source structure is only suitable for users of high-temperature and high-pressure hot air with short-term discontinuous output.

[0023] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A heat storage type high temperature and high pressure hot blast furnace, mainly comprising: an outer protective layer, a carbon fiber wound outer shell layer, a sealed metal shell, a high temperature heat storage body, a high temperature wind channel, an air inlet, an electric heating body or a high temperature heat source, a high temperature wind chamber, an interface flange, a high temperature resistant outlet sleeve, a high temperature wind outlet, a detection and control line connection port, a detection and control system, a cooling pump, and a cooling source; characterized in that: A carbon fiber wound outer shell layer, a coolant pipe, a sealed metal shell, an elastic fiber insulation layer and a solid insulation layer are sequentially arranged inwardly from the outer protective layer of the furnace body; a coolant pipe is wound around the outside of the sealed metal shell, and a carbon fiber wound filling layer is also arranged in the gap between the coolant pipes; a high-temperature heat storage body is arranged in the solid insulation layer, and high-temperature wind channels are evenly distributed in the axial direction of the high-temperature heat storage body, and an electric heating body for heating the high-temperature heat storage body or a high-temperature heat source channel communicating with the outside is arranged inside the high-temperature heat storage body; one side of the high-temperature heat storage body is a low-temperature wind chamber, and the other side is a high-temperature wind chamber, the low-temperature wind chamber is connected to the outside with an air inlet, and the high-temperature wind chamber is connected to the outside with an air inlet. There is a high-temperature air outlet connected externally for output; external high-pressure low-temperature air enters the low-temperature air chamber through the air inlet, flows through the high-temperature air channel of the high-temperature heat storage body for heating, and then enters the high-temperature air chamber, and is output from the high-temperature air outlet. A high-temperature resistant outlet sleeve is installed at the high-temperature air outlet, and the external output pipeline is connected to the high-temperature air outlet through an interface flange; when the high-temperature heat source is set externally, heat storage and heat release valves and high-temperature circulation fans are arranged on the air inlet and the high-temperature air outlet pipeline; the cooling source stores the corresponding cooling medium, which is input into the coolant pipe outside the closed metal shell for cooling the closed metal shell under the power of the cooling pump.

2. A regenerative high-temperature and high-pressure hot blast furnace according to claim 1, characterized in that: The high-temperature heat storage body is composed of a high-temperature resistant metal tube bundle with a melting point temperature greater than 1500°C or a solid heat storage component with heat release air flow vents.

3. The regenerative high-temperature and high-pressure hot blast furnace according to claim 1, characterized in that: The high-temperature air channel is a through hole arranged on the high-temperature heat storage body and penetrating through the cross section and distributed in a honeycomb shape.

4. The regenerative high-temperature and high-pressure hot blast furnace according to claim 1, characterized in that: The tensile strength of the carbon fiber winding shell and the carbon fiber winding filling layer is between 3500-395000 MPa, and they are made of multi-layer winding of threads or cloth made of carbon fiber with resin as a binder.

5. The regenerative high-temperature and high-pressure hot blast furnace according to claim 1, characterized in that: The elastic fiber thermal insulation layer is made by compressing aluminum silicate aerogel felt and silicon dioxide aluminum aerogel felt.

6. The regenerative high-temperature and high-pressure hot blast furnace according to claim 1, characterized in that: The electric heating body arranged inside the high-temperature heat storage body or the external high-temperature heat source is a hot air generating device that can heat the temperature value of the high-temperature heat storage body to a temperature value within the required accuracy range of the heat release output hot air temperature value.

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