High-temperature heating furnace

Abstract

The high-temperature heating furnace comprises a furnace base, a furnace body is arranged on the furnace base, a porous medium combustor is arranged in the furnace base, and a pressure relief mechanism is arranged at the top of the furnace body; a heat preservation mechanism is arranged on the outer wall of the furnace body, a heat exchange shell is arranged above the pressure relief mechanism, and a heating cavity is formed in the heat exchange shell and connected with the heat preservation mechanism. When the heating furnace is used, when the pressure of high-temperature smoke in the heating furnace reaches a certain degree, the high-temperature smoke can be discharged through the pressure relief mechanism and the heat exchange shell, the heating furnace body is not prone to being broken, heat is recycled through circulation of heat exchange liquid, then heat preservation is conducted on the furnace body, and the heating efficiency of the heating furnace is kept; the service life of the heating furnace is prolonged; the use safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heating furnaces, in particular to a high-temperature heating furnace. Background Art

[0002] Porous media combustion is a combustion method that adds porous media to the burner. Since the porous media burner has three heat exchange modes: convection, heat conduction and radiation, the temperature in the combustion area tends to be uniform and maintains a relatively stable temperature gradient.

[0003] Publication (announcement) number: CN109869719A, discloses a high-temperature and high-pressure porous medium burner, including a high-pressure gas inlet, an air inlet, a combustion chamber, a porous medium, an electronic ignition device and a cooling chamber, etc. The combustion area of ​​the burner is a conical structure, which is filled with porous media. The mixed gas burns in the porous medium to produce high-temperature and high-pressure gas. An insulation layer is arranged inside the burner and the cooling chamber. A cavity is left between the outer wall of the burner and the cooling chamber, and the cooling air flows in from the bottom of the cavity and flows out from the upper side. A pressure relief valve, a pressure regulating valve and a pressure gauge are arranged at the burner outlet. Through this arrangement, high-temperature and high-pressure working fluids can be provided for gas turbines and other equipment, which can achieve higher cycle thermal efficiency, reduce heat loss, save energy and reduce pollutant emissions.

[0004] The prior art lacks effective heat preservation measures and generates huge energy waste due to pressure relief when in use.

[0005] Publication (Announcement) No.: CN218178872U, discloses a regenerative porous medium burner, which includes a ventilation duct, a gas mixing chamber, a combustion chamber and a preheating chamber, wherein the ventilation duct, the gas mixing chamber, the preheating chamber and the combustion chamber are sequentially connected, and the preheating chamber is formed around the periphery of the combustion chamber. The present application ingeniously arranges the preheating chamber, which can not only preheat the gas, but also insulate the combustion chamber through the preheating chamber, so that the heat is fully utilized and energy is saved.

[0006] Since the heating furnace in the prior art is in a high temperature state during operation, it is easy to be deformed due to heat, and the flue gas flow rate is slow, resulting in low internal working efficiency of the heating furnace. When the internal flue gas of the heating furnace reaches a certain level and cannot be discharged, the temperature of the furnace top and the pressure inside the furnace body rise sharply, which can easily cause the heating furnace to rupture.

[0007] Publication (announcement) number: CN114234628A, discloses a new type of energy-saving heating furnace using a porous medium burner, specifically discloses a furnace body with a stepping conveying device, by partitioning the furnace body into a preheating zone and a heating zone, and arranging a porous medium burner in the heating zone, thereby achieving flameless combustion, making the furnace size smaller than that of a general flame furnace, making it easier to concentrate heat during the heating process, and having good temperature uniformity, which can reduce the heating temperature of the workpiece and reduce the amount of decarburization.

[0008] Since the heating furnace in the prior art is in a high temperature state during operation, it is easy to be deformed due to heat, and the flue gas flow rate is slow, resulting in low internal working efficiency of the heating furnace. When the internal flue gas of the heating furnace reaches a certain level and cannot be discharged, the temperature of the furnace top and the pressure inside the furnace body rise sharply, which can easily cause the heating furnace to rupture.

[0009] In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the beneficial effects produced are all different from the present invention. Regarding more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the invention

[0010] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to solve the problem that when the internal flue gas of the heating furnace reaches a certain level and cannot be discharged, the temperature of the furnace top and the pressure inside the furnace body rise sharply, which can easily cause the heating furnace to rupture, and the problem of causing a large amount of heat loss in the process of exhausting the flue gas.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A high-temperature heating furnace comprises a furnace seat, a furnace body is arranged on the furnace seat, a porous medium burner is arranged in the furnace seat, and a pressure relief mechanism is arranged on the top of the furnace body; a heat preservation mechanism is arranged on the outer wall of the furnace body, a heat exchange shell is arranged above the pressure relief mechanism, and a heating chamber is arranged in the heat exchange shell and connected to the heat preservation mechanism.

[0013] The heat preservation mechanism comprises a liquid storage cavity arranged on the outer wall of the furnace body, the liquid storage cavity is connected with the heating tube in the heating cavity through a liquid inlet pipe, and the other end of the heating tube is connected with the liquid storage cavity through a liquid outlet pipe.

[0014] A plurality of containers are arranged on the heat receiving tube to expand the heating area. The containers are fixed on a supporting mesh plate, and the supporting mesh plate is connected to the heat exchange shell 4.

[0015] The liquid inlet pipe is provided with a water pump.

[0016] The liquid storage chamber is provided with a liquid injection tube, and the liquid injection tube is provided with a liquid injection valve;

[0017] The liquid storage chamber is also provided with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve.

[0018] The pressure relief mechanism includes a pressure relief hole opened on the top of the furnace body, a pressure relief valve is arranged below the pressure relief hole, and the pressure relief valve includes a base, and the base is connected to the top of the furnace body through a fixing frame.

[0019] A guide frame is also provided between the base and the heat exchange shell, and a first sealing plug is installed on the guide frame. The upper portion of the first sealing plug passes through the pressure relief hole, and the lower carrier plate is connected to the guide frame.

[0020] An annular groove is provided at the lower end of the inner wall of the heat exchange shell, and the diameter of the annular groove is larger than the diameter of the first sealing plug.

[0021] A countersunk air inlet hole is provided at the bottom of the first sealing plug, and the air inlet hole is connected to the heating chamber via a through-hole-shaped branch hole provided on the upper outer wall.

[0022] A spring is sleeved on the guide frame, and the two ends of the spring are fixedly connected to the carrier plate and the top wall of the furnace body respectively. Under normal circumstances, the inner wall of the heat exchange shell blocks the branch hole; when the first sealing plug compresses the spring upward, the branch hole communicates with the inside of the heat exchange shell through the pressure relief hole wall.

[0023] A top main pipe is arranged above the furnace body, and the top main pipe is connected with the liquid storage chamber through multiple connecting pipes. The top main pipe is connected with the heating pipe in the heating chamber through the second pipe. The heating pipe is connected with the first pipe, the first pipe is connected with a connecting pipe, and a water pump is arranged on the second pipe.

[0024] The top of the heat exchange shell is provided with an exhaust hole.

[0025] The exhaust hole at the top of the heat exchange shell is connected to an external discharge pipe, which is fixedly mounted on the heat exchange shell. The upper end of the external discharge pipe is open, and a second sealing plug is arranged in the upper end opening of the external discharge pipe. A switching mechanism is also installed on the heat exchange shell, and the switching mechanism drives the second sealing plug to open and close the upper port of the external discharge pipe.

[0026] The switching mechanism comprises a support arm, the support arm is fixedly connected to the heat exchange shell, a rotating shaft is installed on the support arm, and a sector wheel is fixedly installed at one end of the rotating shaft;

[0027] A guide rod is fixedly installed on the top of the second sealing plug, a frame is fixedly installed on the upper end of the guide rod, and the fan-shaped wheel is arranged in the frame;

[0028] A motor is fixedly mounted on the support arm, and an output shaft of the motor passes through the support arm and is fixedly connected to the rotating shaft.

[0029] A dust cover is installed on the motor.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1) When the high-temperature flue gas pressure inside the heating furnace reaches a certain level, it can be discharged through the pressure relief valve and the heat exchange shell, which is not likely to cause the heating furnace body to rupture;

[0032] 2) Recover heat through the circulation of heat exchange liquid, thereby keeping the furnace body warm, maintaining the heating efficiency of the heating furnace, extending the service life of the heating furnace and improving its safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a high temperature heating furnace of the present invention;

[0034] Figure 2 It is a schematic diagram of a half-section structure of the present invention;

[0035] Figure 3 is a side view of the present invention;

[0036] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of the middle heat exchange shell;

[0037] Figure 5 It is a schematic diagram of the internal structure of the heat exchange shell of the present invention.

[0038] In the figure: 1. furnace base; 2. furnace body; 3. liquid storage chamber; 4. heat exchange shell; 5. annular groove; 6. support mesh plate; 7. first pipeline; 72. second pipeline; 8. heat receiving pipe; 9. container; 10. water pump; 13. guide frame; 14. spring; 15. first sealing plug; 16. air inlet; 17. branch hole; 18. external pipe; 19. second sealing plug; 20. support arm; 21. rotating shaft; 22. fan-shaped wheel; 23. guide rod; 24. frame; 25. motor; 26. carrier plate; 31. connecting pipe; 32. top main pipe; 33. base; 34. fixing frame. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 5A high-temperature heating furnace comprises a furnace seat 1, a furnace body 2 is arranged on the furnace seat 1, a porous medium burner is arranged in the furnace seat 1, and a pressure relief mechanism is arranged on the top of the furnace body 2; a heat preservation mechanism is arranged on the outer wall of the furnace body 2, a heat exchange shell 4 is arranged above the pressure relief mechanism, and a heating chamber is arranged in the heat exchange shell 4 and connected with the heat preservation mechanism.

[0041] Embodiment 1:

[0042] The heat exchange shell 4 is provided with a heating chamber, and the heat preservation mechanism includes a liquid storage chamber 3 provided on the outer wall of the furnace body 2, the liquid storage chamber 3 is connected with the heat receiving pipe 8 in the heating chamber through a liquid inlet pipe, and the other end of the heat receiving pipe 8 is connected with the liquid storage chamber through a liquid outlet pipe;

[0043] The heat receiving tube 8 is provided with a plurality of containers 9 to expand the heating area, and the containers 9 are fixed on the supporting mesh plate 6, and the supporting mesh plate is fixed on the heat exchange shell 4;

[0044] A water pump 10 is installed on the liquid inlet pipe;

[0045] The liquid storage chamber 3 is provided with a liquid injection tube and a liquid injection valve is provided on the liquid injection tube. A certain amount of heat exchange liquid is injected into the liquid storage chamber 3 through the liquid injection valve, and the heat exchange liquid is retained in the liquid storage chamber 3 .

[0046] The liquid storage chamber 3 is also provided with a drain pipe and a drain valve is provided on the drain pipe, and the heat exchange liquid is drained through the drain valve so as to be replaced with new heat exchange liquid.

[0047] The pressure relief mechanism includes a pressure relief hole opened on the top of the furnace body 2, a pressure relief valve is arranged below the pressure relief hole, and the pressure relief valve includes a base 33, the base 33 is connected to the top of the furnace body 2 through a fixing frame 34, and a guide frame 13 is also arranged between the base 33 and the heat exchange shell 4, and a first sealing plug 15 is installed on the guide frame 13, the upper part of the first sealing plug 15 passes through the pressure relief hole, and the lower carrier plate 26 is connected to the guide frame 13;

[0048] The top of the heat exchange shell 4 is provided with an exhaust hole so that the gas in the heat exchange shell 4 can be discharged; the lower end of the inner wall of the heat exchange shell 4 is provided with an annular groove 5, and the diameter of the annular groove 5 is larger than the diameter of the first sealing plug 15;

[0049] The bottom of the first sealing plug 15 is provided with a countersunk air inlet 16, and the air inlet 16 is connected to the heating chamber through a through-hole-shaped branch hole 17 provided on the upper outer wall;

[0050] The guide frame 13 is sleeved with a spring 14, and the two ends of the spring 14 are respectively fixedly connected to the carrier plate 26 and the top wall of the furnace body 2. Under normal conditions, the inner wall of the heat exchange shell 4 blocks the branch hole 17; when the first sealing plug 15 compresses the spring 14 upward, the branch hole 17 communicates with the inside of the heat exchange shell 4 through the pressure relief hole wall;

[0051] A top main pipe 32 is arranged above the furnace body 2, and the top main pipe 32 is connected to the liquid storage chamber 3 through a plurality of connecting pipes 31, and the top main pipe is connected to the heating pipe 8 in the heating chamber through a second pipe 72, and the heating pipe 8 is connected to the first pipe 7 to send out the liquid, and the first pipe 7 is connected to a connecting pipe 31;

[0052] The second pipe 72, part of the connecting pipe 31, and part of the top main pipe 32 act as the liquid inlet pipe; the first pipe 7, part of the connecting pipe 31, and part of the top main pipe 32 act as the liquid outlet pipe, and the second pipe 72 is equipped with a water pump 10;

[0053] The liquid storage chamber 3 is made of aluminum metal.

[0054] It should be noted that the functions of the liquid inlet pipe and the liquid outlet pipe are not strictly limited. The liquid inlet pipe can also discharge liquid, and the liquid outlet pipe can also inlet liquid. This embodiment is only a preferred best implementation method. This setting allows cold water to pass through the water pump 10, reduce the temperature of the water pump 10, and increase the service life. It can also be reversed when necessary.

[0055] Specific working process:

[0056] When the amount of high-temperature flue gas in the furnace body 2 increases and the furnace body 2 is in a high-pressure state, the first sealing plug 15 is squeezed by the pressure of the high-temperature flue gas, and the first sealing plug 15 moves upward due to the upward squeezing force, and the spring 14 is in a compressed state. When the multiple branch holes 17 move to the annular groove 5, the air inlet 16 is connected with the annular groove 5 and the heat exchange shell 4 through the multiple branch holes 17, so that when the high-pressure flue gas inside the heating furnace is discharged into the heat exchange shell 4, it will not cause the heating furnace body to rupture.

[0057] By injecting a certain amount of heat exchange liquid into the liquid storage chamber 3, the heat exchange liquid is retained in the liquid storage chamber 3. When the high-temperature flue gas of the furnace body 2 is discharged to the heating chamber of the heat exchange shell 4 by the pressure relief mechanism. At this time, the heat exchange liquid in the liquid storage chamber 3 is sucked in by the water pump 10, and the heat exchange liquid then enters the heat receiving tube 8. The heat exchange liquid in the heat receiving tube 8 enters multiple containers 9. The high-temperature flue gas contacts the multiple containers 9. The multiple containers 9 can increase the contact area with the high-temperature flue gas, so that the temperature of the heat exchange liquid in the container 9 rises rapidly. At the same time, the heat exchange liquid in the heat receiving tube 8 is discharged from the first pipeline 7 and returned to the liquid storage chamber 3. In this process, the liquid temperature in the liquid storage chamber 3 continues to rise, so as to recover heat to keep the furnace body 2 warm. At the same time, the cooled exhaust gas is discharged through the exhaust hole on the heat exchange shell 4.

[0058] Embodiment 2:

[0059] See also Figure 4 On the basis of Example 1, the exhaust hole at the top of the heat exchange shell 4 is connected to an external discharge pipe 18, and the external discharge pipe 18 is fixedly installed on the heat exchange shell 4. The upper end of the external discharge pipe 18 is open, and a second sealing plug 19 is arranged in the upper end opening of the external discharge pipe 18. The second sealing plug 19 can block the upper port of the external discharge pipe 18. A switching mechanism is also installed on the heat exchange shell 4, and the switching mechanism drives the second sealing plug 19 to open and close the upper port of the external discharge pipe 18, thereby constructing an intermittent pressure relief mechanism.

[0060] The switching mechanism includes a support arm 20, which is fixedly connected to the heat exchange shell 4. A rotating shaft 21 is rotatably installed on the support arm 20, and a fan-shaped wheel 22 is fixedly installed on one end of the rotating shaft 21. A guide rod 23 is fixedly installed on the top of the second sealing plug 19, and a frame 24 is fixedly installed on the upper end of the guide rod 23. Anti-slip grooves are provided on both sides of the frame 24, and the fan-shaped wheel 22 is arranged in the frame 24; when the fan-shaped wheel 22 rotates, its wheel edge contacts the inner sides of the frame 24 respectively; a motor 25 is fixedly installed on the support arm 20, and the output shaft of the motor 25 passes through the support arm 20 and is fixedly connected to the rotating shaft 21, and a dust cover is installed on the motor 25.

[0061] Specific working process:

[0062] The fan wheel 22 is cut from a sector of a complete circle, so the fan wheel 22 can sequentially rub against the two sides and the top of the frame 24 for each rotation. When the arc of the fan wheel 22 contacts the top of the frame 24, the second sealing plug 19 reaches the highest point. When the arc of the fan wheel 22 faces the bottom of the frame 24, the second sealing plug 19 reaches the lowest point, thereby causing the frame 24 to drive the guide rod 23 to reciprocate up and down, thereby driving the second sealing plug 19 to intermittently open and close the upper port of the outer pipe 18. Obviously, the speed of the motor 25 determines the frequency of opening and closing the upper port of the outer pipe 18. This arrangement can fully heat the heated pipe 8 and the container 9 in the heating chamber.

[0063] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0064] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0066] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature heating furnace, comprising a furnace seat, a furnace body is arranged on the furnace seat, and a porous medium burner is arranged in the furnace seat; It is characterized in that The top of the furnace body is provided with a pressure relief mechanism; the outer wall of the furnace body is provided with a heat preservation mechanism, a heat exchange shell is provided above the pressure relief mechanism, and a heating chamber connected to the heat preservation mechanism is provided in the heat exchange shell.

2. A high temperature heating furnace according to claim 1, characterized in that: The heat preservation mechanism comprises a liquid storage cavity arranged on the outer wall of the furnace body, the liquid storage cavity is connected with the heating tube in the heating cavity through a liquid inlet pipe, and the other end of the heating tube is connected with the liquid storage cavity through a liquid outlet pipe.

3. A high temperature heating furnace according to claim 2, characterized in that: A plurality of containers are arranged on the heat receiving tube to expand the heating area. The containers are fixed on a supporting mesh plate, and the supporting mesh plate is connected to the heat exchange shell 4.

4. A high temperature heating furnace according to claim 3, characterized in that: The liquid inlet pipe is provided with a water pump.

5. A high temperature heating furnace according to claim 4, characterized in that: The liquid storage chamber is provided with a liquid injection tube, and the liquid injection tube is provided with a liquid injection valve; The liquid storage chamber is also provided with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve.

6. A high temperature heating furnace according to claim 5, characterized in that: The pressure relief mechanism includes a pressure relief hole opened on the top of the furnace body, a pressure relief valve is arranged below the pressure relief hole, and the pressure relief valve includes a base, and the base is connected to the top of the furnace body through a fixing frame. A guide frame is also provided between the base and the heat exchange shell, and a first sealing plug is installed on the guide frame. The upper portion of the first sealing plug passes through the pressure relief hole, and the lower carrier plate is connected to the guide frame.

7. A high temperature heating furnace according to claim 6, characterized in that: An annular groove is provided at the lower end of the inner wall of the heat exchange shell, and the diameter of the annular groove is larger than the diameter of the first sealing plug.

8. A high temperature heating furnace according to claim 7, characterized in that: A countersunk air inlet hole is provided at the bottom of the first sealing plug, and the air inlet hole is connected to the heating chamber via a through-hole-shaped branch hole provided on the upper outer wall.

9. A high temperature heating furnace according to claim 8, characterized in that: A spring is sleeved on the guide frame, and the two ends of the spring are fixedly connected to the carrier plate and the top wall of the furnace body respectively. Under normal circumstances, the inner wall of the heat exchange shell blocks the branch hole; when the first sealing plug compresses the spring upward, the branch hole communicates with the inside of the heat exchange shell through the pressure relief hole wall.

10. A high temperature heating furnace according to claim 9, characterized in that: A top main pipe is arranged above the furnace body, and the top main pipe is connected with the liquid storage chamber through multiple connecting pipes. The top main pipe is connected with the heating pipe in the heating chamber through the second pipe. The heating pipe is connected with the first pipe, and the first pipe is connected with a connecting pipe. A water pump is arranged on the second pipe.

11. A high temperature heating furnace according to any one of claims 1 to 10, characterized in that: The top of the heat exchange shell is provided with an exhaust hole.

12. A high temperature heating furnace according to claim 11, characterized in that: The exhaust hole at the top of the heat exchange shell is connected to an external discharge pipe, which is fixedly mounted on the heat exchange shell. The upper end of the external discharge pipe is open, and a second sealing plug is arranged in the upper end opening of the external discharge pipe. A switching mechanism is also installed on the heat exchange shell, and the switching mechanism drives the second sealing plug to open and close the upper port of the external discharge pipe.

13. A high temperature heating furnace according to claim 12, characterized in that: The switching mechanism comprises a support arm, the support arm is fixedly connected to the heat exchange shell, a rotating shaft is installed on the support arm, and a sector wheel is fixedly installed at one end of the rotating shaft; A guide rod is fixedly installed on the top of the second sealing plug, a frame is fixedly installed on the upper end of the guide rod, and the fan-shaped wheel is arranged in the frame; A motor is fixedly mounted on the support arm, and an output shaft of the motor passes through the support arm and is fixedly connected to the rotating shaft.

14. A high temperature heating furnace according to claim 13, characterized in that: A dust cover is installed on the motor.

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