High-reliability acid making boiler

Abstract

The invention discloses a high-reliability acid-making boiler, and relates to the technical field of acid-making boilers. The furnace specifically comprises a furnace body, an exhaust duct is arranged at the top of the furnace body, a slag receiving shell is arranged at the bottom of the furnace body, a hollowed-out frame is arranged on the inner wall, located above the slag receiving shell, of the furnace body, an air inlet duct and a door are arranged on the two sides, located above the hollowed-out frame, of the furnace body respectively, and a water cooling wall is arranged on the inner wall of the top of the furnace body. On one hand, the fixing piece is arranged to be in a combined fixing form of the fixing frame, the hoop and the lining, on the basis of ensuring convenient mounting, dismounting and stable fixing, the toughness of the lining can be used for buffering stress generated when the U-shaped pipe expands with heat and contracts with cold, on the other hand, the high-nickel alloy fusion welding coating is arranged on the outer wall of the evaporation pipe, acid corrosion can be prevented, and the service life of the evaporation pipe is prolonged. Meanwhile, the high-temperature-resistant coatings are arranged on the outer walls of the fixing frame and the hoop, thermal deformation is prevented, in addition, the obtuse-angle elbows are arranged in an obtuse angle mode, scouring erosion of heat exchange media to the turning positions can be buffered, and pipe explosion is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of acid-making boilers, and in particular to a high-reliability acid-making boiler. Background Art

[0002] The wet desulfurization process in the coking industry is to remove elemental paste sulfur and high-concentration desulfurization waste liquid from coke oven gas, and then use the incineration process to produce concentrated sulfuric acid. It not only solves the environmental problem of the difficult treatment of desulfurization waste liquid, but also produces concentrated sulfuric acid products, bringing economic benefits to the enterprise. It is currently a more advanced production process technology.

[0003] The existing acid-making boilers have the following disadvantages: 1. The water-cooled wall tube bundles in the boiler are all fixedly connected without margins. When the tube bundles expand due to heat or contract due to cold, there is no margin compensation, so the stress after the tube bundles are deformed cannot be eliminated; 2. Condensation may occur on the water-cooled wall in the boiler, and sulfuric acid will dissolve in the condensate to form a dilute sulfuric acid solution, which will corrode the tube bundle; 3. The elbows of the water-cooled wall tube bundle are 90-degree elbows. When the hot water flows through the elbows, the impact on the elbows is relatively large, which can easily cause leakage at the elbows.

[0004] To this end, the present invention proposes a high-reliability acid-making boiler. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high-reliability acid-making boiler.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A high-reliability acid-making boiler comprises a furnace body, wherein an exhaust duct is arranged on the top of the furnace body, a slag receiving shell is arranged on the bottom of the furnace body, a hollow frame is arranged on the inner wall of the furnace body above the slag receiving shell, air inlets and doors are arranged on both sides of the furnace body above the hollow frame, and a water-cooled wall is arranged on the top inner wall of the furnace body; The water-cooled wall is composed of multiple groups of evaporation tubes fixed to the inner walls of the furnace body at four places by fixing parts, and the tops of all evaporation tubes are interconnected through the second manifold, and the bottoms of all evaporation tubes are interconnected through the first manifold, a heat exchanger is connected between the first manifold and the second manifold, and a circulation pump is provided at the connection between the second manifold and the heat exchanger or at the connection between the first manifold and the heat exchanger; The evaporation tube is composed of a plurality of "U" tubes connected by blunt-angle elbows; The outer walls of the "U" tube and the blunt-angle elbow are sprayed with a high-nickel alloy fusion welding coating; The fixing part includes a fixing frame and a plurality of hoops, the fixing frame is fixed to the inner wall of the furnace body, the hoops are fixed to the other side of the fixing frame, and the inner walls of the fixing frame and the hoops are fixed with a "U" tube wrapped by a bushing, the outer walls of the fixing frame and the hoops are sprayed with a high-temperature resistant coating, and the bushing is made of ductile metal.

[0007] Preferably: both sides of the hollow frame are rotatably connected to sliders via connecting shafts, the sliders are longitudinally slidably connected to the inner wall of the furnace body, a gear is fixed to the outer wall of the connecting shaft, and one inner wall of the furnace body is provided with teeth meshing with the gear.

[0008] Furthermore: an air intake fan is fixed to the inner wall of the air intake duct, and a turbine is provided at the bottom of the air intake duct located downstream of the air intake fan, an eccentric rod is fixed to the outer wall of the output shaft of the turbine, the other end of the eccentric rod is rotatably connected to connecting rod one, the other end of connecting rod one is rotatably connected to a sliding rod slidably fitted with the side wall of the furnace body, the other end of the sliding rod is rotatably connected to connecting rod two, and the other end of connecting rod two is rotatably connected to the bottom of the hollow frame.

[0009] Based on the above scheme: the side wall of the furnace body is fixed with an outer shell, the inner wall of the outer shell is insulated and fixed with a magnetic core, the outer wall of the magnetic core is respectively wound with a primary coil and two secondary coils, and the outer shell is provided with a group of power control components at each secondary coil.

[0010] A better solution among the aforementioned solutions is: the power control component includes a telescope fixed to the side wall of the shell and a guide block fixed to the telescopic end of the telescope, the side wall of the guide block is fixed with an electrode head, the electrode head contacts and cooperates with the secondary coil and is electrically conductive with the secondary coil, and the two ends of the primary coil are connected to an external AC power supply.

[0011] As a further solution of the present invention: one end of one of the secondary coils and an electrode head matched with the secondary coil are respectively connected to the connection terminals of the circulation pump.

[0012] At the same time, one end of another secondary coil and an electrode head matched with the secondary coil are respectively connected to the connection terminals of the air intake fan.

[0013] As a preferred embodiment of the present invention, the telescopic device for controlling the power change of the circulation pump is a pneumatic telescopic rod, and the telescopic device for controlling the power change of the intake fan is an electromagnetic telescopic rod.

[0014] At the same time, a heat-sensing tube is fixed to the inner wall of the exhaust duct, one end of the heat-sensing tube is blocked, the other end of the heat-sensing tube is connected to the pneumatic cavity of the pneumatic telescopic rod, and the interior of the heat-sensing tube is injected with a thermal expansion medium; The thermal expansion medium is a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0015] As a better solution of the present invention: a light emitter is clamped on the inner wall of one side of the exhaust duct, and a lens and a photoelectric conversion plate are respectively fixed to the inner wall of the other side of the exhaust duct symmetrical to the light emitter, and the output end of the photoelectric conversion plate is connected to the electromagnet of the electromagnetic telescopic rod.

[0016] The beneficial effects of the present invention are: 1. The present invention, on the one hand, by arranging the fixing part in a combined fixing form of a fixing frame, a hoop and a bushing, can utilize the toughness of the bushing to buffer the stress of the "U" tube during thermal expansion and contraction on the basis of ensuring easy installation, disassembly and stable fixation; on the other hand, by arranging a high-nickel alloy fusion welding coating on the outer wall of the evaporator tube, it can prevent acid corrosion; at the same time, a high-temperature resistant coating is arranged on the outer wall of the fixing frame and the hoop to prevent thermal deformation; in addition, by arranging an obtuse angle elbow, which is arranged at an obtuse angle, it can buffer the erosion of the heat exchange medium on the turning point and prevent the tube from bursting.

[0017] 2. The present invention sets the hollow frame to be movable, which can rotate and swing left and right and vibrate up and down, thereby making the contact area between the incineration material and the air blown in by the intake fan larger, thereby increasing the completeness of combustion, and the left and right rotation and swing and the up and down vibration of the hollow frame are linked by gears and teeth, and the left and right rotation and swing of the hollow frame are realized by the turbine to the connecting rod and other components. The power comes from the intake fan, thereby reducing the power layout, increasing the linkage, and realizing the function of simultaneously controlling the intake amount and the movement frequency of the hollow frame by only controlling the power of the intake fan when combustion is incomplete, thereby simplifying the control logic.

[0018] 3. The present invention, based on the characteristic that the number of turns of electromagnetic induction is linearly related to the output, can use the telescopic device to control the power of the circulation pump and the electrode head accordingly, thereby ensuring the heat exchange efficiency, ensuring that the gas temperature at the exhaust duct outlet is appropriate, and ensuring sufficient combustion.

[0019] 4. The present invention, by arranging a heat-sensing tube, utilizes the thermal expansion and contraction of the heat-sensing tube to control the expansion and contraction of the pneumatic telescopic rod and then controls the circulation power of the circulation pump, thereby realizing the function of negative feedback regulation of the circulation heat exchange power according to the temperature of the exhaust duct. At the same time, a mixed gas of nitrogen dioxide and dinitrogen tetroxide is arranged in the heat-sensing tube. When the temperature changes, in addition to its own thermal expansion and contraction, a chemical equilibrium shift will also occur, thereby increasing the sensitivity of control.

[0020] 5. The present invention, by setting up components such as photoelectric conversion plates, lenses, and light emitters, utilizes the principle that whether combustion is sufficient is related to the color of the gas produced by combustion, and thus utilizes the photosensitivity of the photoelectric conversion plate to judge whether combustion is sufficient. At the same time, the extension and retraction of the electromagnetic telescopic rod is controlled according to the output voltage of the photoelectric conversion plate, thereby achieving the function of negative feedback regulation of the air intake volume and the vibration amplitude of the hollow frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-reliability acid-making boiler proposed by the present invention; Figure 2 This is a schematic diagram of the water-cooled wall structure of a high-reliability acid-making boiler proposed by the present invention; Figure 3 This is a schematic diagram of the evaporation tube structure of a high-reliability acid-making boiler proposed by the present invention; Figure 4 This is a schematic diagram of the partial structure of a fixing part of a high-reliability acid-making boiler proposed by the present invention; Figure 5 This is a schematic diagram of the connection structure between the furnace body and the hollow frame of a high-reliability acid-making boiler proposed by the present invention; Figure 6 This is a schematic structural diagram of a driving part of a hollow frame of a high-reliability acid-making boiler proposed by the present invention; Figure 7 This is a schematic structural diagram of a connecting shaft and an air intake fan power control portion of a high-reliability acid-making boiler proposed by the present invention; Figure 8 The present invention is a schematic cross-sectional structural diagram of an exhaust duct of a high-reliability acid-making boiler proposed by the present invention.

[0022] In the figure: 1. furnace body; 2. air inlet; 3. slag shell; 4. door; 5. water wall; 6. exhaust duct; 7. hollow frame; 8. fixing parts; 9. circulation pump; 10. heat exchanger; 11. manifold 1; 12. manifold 2; 13. evaporation tube; 14. blunt elbow; 15. "U" tube; 16. fixing frame; 17. ferrule; 18. bushing; 19. connecting shaft; 20. slider; 21. teeth; 22. Gear; 23. Intake fan; 24. Turbine; 25. Eccentric rod; 26. Connecting rod one; 27. Sliding rod; 28. Connecting rod two; 29. ​​Housing; 30. Magnetic core; 31. Guide block; 32. Electrode head; 33. Secondary coil; 34. Power control component; 35. Primary coil; 36. Heat-sensitive tube; 37. Photoelectric conversion board; 38. Lens; 39. Light emitter; 40. Telescope. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] Example 1, a high reliability acid-making boiler, such as Figure 1-Figure 8 As shown, it includes a furnace body 1, wherein an exhaust duct 6 is arranged on the top of the furnace body 1, a slag receiving shell 3 is arranged on the bottom of the furnace body 1, and a hollow frame 7 is arranged on the inner wall of the furnace body 1 above the slag receiving shell 3, an air inlet duct 2 and a door 4 are respectively arranged on both sides of the furnace body 1 above the hollow frame 7, and a water-cooled wall 5 is arranged on the top inner wall of the furnace body 1.

[0026] When in use, open the door 4, place the combustible material on the hollow frame 7, and then close the door 4 after ignition. Then, blow air through the air inlet duct 2 to ensure the oxygen required for combustion. The exhaust gas generated by the combustion passes through the water-cooled wall 5 for heat exchange and cooling, and is discharged through the exhaust duct 6. The exhaust gas can then be treated to produce acid. Since the preparation of sulfuric acid by burning sulfur oxides in the exhaust gas belongs to the existing technology process, this embodiment does not make creative work on it, so it will not be described in detail.

[0027] The water-cooled wall 5 is composed of multiple groups of evaporation tubes 13 fixed to the inner walls of the furnace body 1 at four places by fixing parts 8, and the tops of all the evaporation tubes 13 are interconnected through the second manifold 12, and the bottoms of all the evaporation tubes 13 are interconnected through the first manifold 11, and a heat exchanger 10 is connected between the first manifold 11 and the second manifold 12, and a circulation pump 9 is provided at the connection between the second manifold 12 and the heat exchanger 10 or at the connection between the first manifold 11 and the heat exchanger 10.

[0028] In this embodiment, there is no limitation on the specific type of the heat exchanger 10. A plate-fin heat exchanger may be used, which dissipates heat into the air and cannot recover energy. A double-channel shell-and-tube heat exchanger may also be used. The heat of the heat exchange medium in the manifold 11, the manifold 12, and the evaporation tube 13 is exchanged to another channel by utilizing the heat exchange between the two channels. The heat exchange medium in the other channel may be water, etc., and heat recovery is achieved by heating the water.

[0029] The evaporation tube 13 is composed of a plurality of "U" tubes 15 connected by obtuse elbows 14. In this embodiment, the turning angle of the obtuse elbows 14 is preferably 135 degrees.

[0030] The outer walls of the "U" tube 15 and the blunt-angle elbow 14 are sprayed with a high-nickel alloy fusion welding coating.

[0031] The fixing member 8 includes a fixing frame 16 and a plurality of hoops 17, wherein the fixing frame 16 is fixed to the inner wall of the furnace body 1, and the hoops 17 are fixed to the other side of the fixing frame 16, and the inner walls of the fixing frame 16 and the hoops 17 are wrapped and fixed with a "U" tube 15 through a bushing 18, and the outer walls of the fixing frame 16 and the hoops 17 are sprayed with a high-temperature resistant coating, and the bushing 18 is made of ductile metal.

[0032] The device, on the one hand, by setting the fixing member 8 as a combined fixing form of the fixing frame 16, the hoop 17, and the bushing 18, can ensure the convenience of installation, disassembly and stable fixation, and can also use the toughness of the bushing 18 to buffer the stress of the "U" tube 15 during thermal expansion and contraction. On the other hand, by setting a high-nickel alloy fusion welding coating on the outer wall of the evaporation tube 13, it can prevent acid corrosion. At the same time, a high-temperature resistant coating is provided on the outer wall of the fixing frame 16 and the hoop 17 to prevent thermal deformation. In addition, by setting the obtuse elbow 14, which is arranged at an obtuse angle, it can buffer the erosion of the heat exchange medium on the turning point and prevent the tube from bursting.

[0033] In order to solve the problem of combustion completeness, such as Figure 5 As shown, both sides of the hollow frame 7 are rotatably connected to sliders 20 via connecting shafts 19, and the sliders 20 are longitudinally slidably connected to the inner wall of the furnace body 1. A gear 22 is fixed to the outer wall of the connecting shaft 19, and one side of the inner wall of the furnace body 1 is provided with teeth 21 meshing with the gear 22.

[0034] An air intake fan 23 is fixed to the inner wall of the air intake duct 2, and a turbine 24 is provided at the bottom of the air intake duct 2 located downstream of the air intake fan 23, an eccentric rod 25 is fixed to the outer wall of the output shaft of the turbine 24, the other end of the eccentric rod 25 is rotatably connected to a connecting rod 26, the other end of the connecting rod 26 is rotatably connected to a sliding rod 27 slidably fitted with the side wall of the furnace body 1, the other end of the sliding rod 27 is rotatably connected to a connecting rod 28, and the other end of the connecting rod 28 is rotatably connected to the bottom of the hollow frame 7.

[0035] When the air intake fan 23 is started, air can be blown into the furnace body 1, thereby inputting oxygen, and at the same time, the turbine 24 will rotate the output shaft due to the air flow, thereby driving the eccentric rod 25 to rotate. The rotation of the eccentric rod 25 can drive the slide bar 27 to reciprocate through the connecting rod 1 26, thereby driving the hollow frame 7 to reciprocate through the connecting rod 28. When the hollow frame 7 reciprocates, the gear 22 is driven to reciprocate through the connecting shaft 19, thereby driving the slider 20 to reciprocate up and down through the gear 22 and the teeth 21, thereby driving the hollow frame 7 to vibrate up and down.

[0036] Since in the actual incineration process, the combustion completeness of the incineration material depends on the oxygen concentration and the contact area between oxygen and the incineration material, the present device, by setting the hollow frame 7 to be movable, can rotate and swing left and right and can also vibrate up and down, so that the contact area between the incineration material and the air blown in by the air intake fan 23 can be larger, thereby increasing the completeness of combustion, and the left and right rotation and swing and up and down vibration of the hollow frame 7 are linked by the gear 22 and the teeth 21, and the left and right rotation and swing of the hollow frame 7 are realized by the turbine 24 to the connecting rod 28 and other components. The power comes from the air intake fan 23, thereby reducing the power layout and increasing the linkage. At the same time, it can also achieve the function of simultaneously controlling the intake volume and the movement frequency of the hollow frame 7 by only controlling the power of the air intake fan 23 when the combustion is incomplete, thereby simplifying the control logic.

[0037] To solve the power control problem, such as Figure 7 As shown, a shell 29 is fixed to the side wall of the furnace body 1, and a magnetic core 30 is insulated and fixed to the inner wall of the shell 29. A primary coil 35 and two secondary coils 33 are respectively wound around the outer walls of the magnetic core 30. A group of power control components 34 are arranged at each secondary coil 33 of the shell 29.

[0038] The power control assembly 34 includes a retractor 40 fixed to the side wall of the housing 29 and a guide block 31 fixed to the retractable end of the retractor 40. An electrode head 32 is fixed to the side wall of the guide block 31. The electrode head 32 contacts and cooperates with the secondary coil 33 and is electrically connected to the secondary coil 33.

[0039] One end of one secondary coil 33 and the electrode head 32 matched with the secondary coil 33 are respectively connected to the connection terminals of the circulation pump 9; one end of the other secondary coil 33 and the electrode head 32 matched with the secondary coil 33 are respectively connected to the connection terminals of the intake fan 23. Both ends of the primary coil 35 are connected to an external AC power supply.

[0040] When an AC voltage is applied to the primary coil 35, an alternating frequency magnetic field will appear in the magnetic core 30, thereby generating an induced voltage in the secondary coil 33. The induced voltages of the two secondary coils 33 are used to power the circulation pump 9 and the intake fan 23, respectively. When the input of the primary coil 35 remains unchanged, the movement of the electrode head 32 will cause the number of turns of the secondary coil 33 to change, thereby changing the number of output turns of the secondary coil 33. Specifically, the logic of the circulation pump 9 and the intake fan 23 is: When the temperature at the outlet of the exhaust duct 6 is on the high side, it indicates that the heat exchange efficiency of the evaporation pipe 13 is relatively low. At this time, the electrode head 32 can be moved through the expander 40 to increase the number of turns of the secondary coil 33 connected to the circulation pump 9, so that the input power of the circulation pump 9 increases, and the circulation rate of the heat exchange medium in the first manifold 11, the second manifold 12, the evaporation pipe 13, and the heat exchanger 10 speeds up, increasing the heat exchange efficiency. Vice versa.

[0041] When incomplete combustion occurs, the electrode head 32 can be moved through another expander 40 to increase the number of turns of the secondary coil 33 connected to the intake fan 23, so that the power of the intake fan 23 increases, the intake air volume increases, and the vibration frequency of the hollow frame 7 increases, so as to increase the combustion efficiency. Vice versa.

[0042] In this device, based on the characteristic that the number of turns is linearly related to the output based on electromagnetic induction, the expander 40 can be used to correspondingly control the power of the circulation pump 9 and the electrode head 32, so as to not only ensure the heat exchange efficiency and ensure that the temperature of the gas at the outlet of the exhaust duct 6 is appropriate, but also ensure complete combustion.

[0043] When this embodiment is used, on the one hand, by setting the fixing member 8 as a combination of the fixing frame 16, the hoop 17, and the bushing 18, the toughness of the bushing 18 can be used to buffer the stress of the "U" tube 15 during thermal expansion and contraction, while ensuring easy installation, disassembly and stable fixation. On the other hand, by setting a high-nickel alloy fusion welding coating on the outer wall of the evaporation tube 13, it can prevent acid corrosion. At the same time, a high-temperature resistant coating is provided on the outer wall of the fixing frame 16 and the hoop 17 to prevent thermal deformation. In addition, by setting an obtuse angle The elbow 14 is arranged at an obtuse angle, which can buffer the erosion of the heat exchange medium on the bend and prevent pipe bursting. When the air intake fan 23 is started, air can be blown into the furnace body 1, thereby inputting oxygen, and at the same time, the turbine 24 will rotate the output shaft due to the air flow, thereby driving the eccentric rod 25 to rotate. The rotation of the eccentric rod 25 can drive the sliding rod 27 to reciprocate through the connecting rod 1 26, thereby driving the hollow frame 7 to reciprocate through the connecting rod 28. When the hollow frame 7 reciprocates, the gear 22 is driven to reciprocate through the connecting shaft 19. The gear 22 and the teeth 21 drive the slider 20 to reciprocate up and down, thereby driving the hollow frame 7 to reciprocate up and down, and when an AC voltage is applied to the primary coil 35, an alternating frequency magnetic field will appear in the magnetic core 30, thereby generating an induced voltage in the secondary coil 33. The induced voltages of the two secondary coils 33 are used to supply power to the circulation pump 9 and the intake fan 23 respectively. When the input of the primary coil 35 remains unchanged, the movement of the electrode head 32 will cause the number of turns of the secondary coil 33 to change, thereby causing the secondary coil 33 to The output turns of 33 change. Specifically, the logic of the circulation pump 9 and the air intake fan 23 is: when the temperature at the outlet of the exhaust duct 6 is high, it means that the heat exchange efficiency of the evaporation tube 13 is relatively low. At this time, the electrode head 32 can be moved by the telescopic device 40 to increase the number of turns of the secondary coil 33 connected to the circulation pump 9, thereby increasing the input power of the circulation pump 9, accelerating the circulation rate of the heat exchange medium in the manifold 11, the manifold 2 12, the evaporation tube 13, and the heat exchanger 10, and increasing the heat exchange efficiency, and vice versa. When the combustion is insufficient, the electrode head 32 can be moved by another telescopic device 40 to increase the number of turns of the secondary coil 33 connected to the air intake fan 23, thereby increasing the power of the air intake fan 23, increasing the air intake volume, and increasing the vibration frequency of the hollow frame 7, thereby increasing the combustion efficiency, and vice versa.

[0044] Example 2, a high reliability acid-making boiler, such as Figure 1-Figure 8 As shown, in order to solve the problem of adaptive negative feedback power control; this embodiment makes the following improvements on the basis of embodiment 1: the telescopic device 40 for controlling the power change of the circulating pump 9 is a pneumatic telescopic rod, and the telescopic device 40 for controlling the power change of the intake fan 23 is an electromagnetic telescopic rod.

[0045] A heat sensing tube 36 is fixed to the inner wall of the exhaust duct 6 , one end of the heat sensing tube 36 is blocked, the other end of the heat sensing tube 36 is connected to the pneumatic cavity of the pneumatic telescopic rod, and the interior of the heat sensing tube 36 is filled with a thermal expansion medium.

[0046] The thermal expansion medium is a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0047] A light emitter 39 is clamped on the inner wall of one side of the exhaust duct 6, and a lens 38 and a photoelectric conversion plate 37 are fixed to the inner wall of the other side of the exhaust duct 6 symmetrical to the light emitter 39. The output end of the photoelectric conversion plate 37 is connected to the electromagnet of the electromagnetic telescopic rod.

[0048] When the present embodiment is in use, when the temperature of the gas at the outlet of the exhaust duct 6 is too high, the thermal expansion medium will expand relatively due to the heat, thereby increasing the pressure in the pneumatic cavity of the telescope 40, causing the telescopic end of the telescope 40 to move, thereby increasing the number of turns connected to the secondary coil 33 controlling the circulation pump 9, and vice versa. When the combustion is incomplete, the gas produced by the combustion will be mixed with particles to become "black smoke", thereby blocking the light emitted by the light emitter 39, reducing the light intensity received by the photoelectric conversion board 37, and reducing the voltage at the output end of the photoelectric conversion board 37, thereby causing the telescopic end of the telescope 40 of the electromagnetic telescopic rod to move, thereby increasing the number of turns connected to the secondary coil 33 controlling the intake fan 23, and vice versa.

[0049] The device, by setting a heat-sensing tube 36, utilizes the thermal expansion and contraction of the heat-sensing tube 36 to control the expansion and contraction of the pneumatic telescopic rod and then control the circulation power of the circulation pump 9, thereby realizing the function of negative feedback regulation of the circulation heat exchange power according to the temperature of the exhaust duct 6. At the same time, a mixed gas of nitrogen dioxide and dinitrogen tetroxide is set in the heat-sensing tube 36. When the temperature changes, in addition to its own thermal expansion and contraction, a chemical equilibrium shift will also occur, thereby increasing the sensitivity of control.

[0050] This device, by setting up components such as a photoelectric conversion plate 37, a lens 38, and a light emitter 39, uses the principle that whether the combustion is sufficient is related to the color of the gas produced by the combustion, and thus uses the photosensitivity of the photoelectric conversion plate 37 to judge whether the combustion is sufficient. At the same time, the extension and retraction of the electromagnetic telescopic rod is controlled according to the output voltage of the photoelectric conversion plate 37, thereby achieving the function of negative feedback regulation of the air intake volume and the vibration amplitude of the hollow frame 7.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high reliability acid-making boiler, characterized in that: It comprises a furnace body (1), wherein an exhaust duct (6) is arranged at the top of the furnace body (1), a slag receiving shell (3) is arranged at the bottom of the furnace body (1), and a hollow frame (7) is arranged on the inner wall of the furnace body (1) above the slag receiving shell (3), air inlet ducts (2) and doors (4) are arranged on both sides of the furnace body (1) above the hollow frame (7), and a water-cooled wall (5) is arranged on the inner wall of the top of the furnace body (1); The water-cooled wall (5) is composed of a plurality of groups of evaporation tubes (13) fixed to the inner wall of the furnace body (1) at four locations through fixing members (8), and the tops of all the evaporation tubes (13) are interconnected through a second manifold (12), and the bottoms of all the evaporation tubes (13) are interconnected through a first manifold (11), a heat exchanger (10) is connected between the first manifold (11) and the second manifold (12), and a circulation pump (9) is provided at the connection between the second manifold (12) and the heat exchanger (10) or at the connection between the first manifold (11) and the heat exchanger (10); The evaporation tube (13) is composed of a plurality of "U" tubes (15) connected by blunt-angle elbows (14); The outer walls of the "U" tube (15) and the blunt-angle elbow (14) are both sprayed with a high-nickel alloy fusion welding coating; The fixing member (8) comprises a fixing frame (16) and a plurality of ferrules (17); the fixing frame (16) is fixed to the inner wall of the furnace body (1); the ferrule (17) is fixed to the other side of the fixing frame (16); and the inner walls of the fixing frame (16) and the ferrule (17) are wrapped and fixed with a "U" tube (15) via a bushing (18); the outer walls of the fixing frame (16) and the ferrule (17) are sprayed with a high-temperature resistant coating; and the bushing (18) is made of a ductile metal.

2. A high reliability acid-making boiler according to claim 1, characterized in that: Both sides of the hollow frame (7) are rotatably connected to sliders (20) via connecting shafts (19); the sliders (20) are longitudinally slidably connected to the inner wall of the furnace body (1); a gear (22) is fixed to the outer wall of the connecting shaft (19); and teeth (21) meshing with the gear (22) are provided on one inner wall of the furnace body (1).

3. A high reliability acid-making boiler according to claim 2, characterized in that: An air intake fan (23) is fixed to the inner wall of the air intake duct (2), and a turbine (24) is provided at the bottom of the air intake duct (2) at a position downstream of the air intake fan (23). An eccentric rod (25) is fixed to the outer wall of the output shaft of the turbine (24). The other end of the eccentric rod (25) is rotatably connected to a connecting rod 1 (26). The other end of the connecting rod 1 (26) is rotatably connected to a sliding rod (27) slidably matched with the side wall of the furnace body (1). The other end of the sliding rod (27) is rotatably connected to a connecting rod 2 (28). The other end of the connecting rod 2 (28) is rotatably connected to the bottom of the hollow frame (7).

4. A high reliability acid-making boiler according to claim 3, characterized in that: A shell (29) is fixed to the side wall of the furnace body (1); a magnetic core (30) is fixed to the inner wall of the shell (29) insulated; a primary coil (35) and two secondary coils (33) are respectively wound around the outer wall of the magnetic core (30); and a group of power control components (34) are provided at each secondary coil (33) of the shell (29).

5. A high reliability acid-making boiler according to claim 4, characterized in that: The power control component (34) comprises an expander (40) fixed to the side wall of the housing (29) and a guide block (31) fixed to the expansion end of the expander (40); an electrode head (32) is fixed to the side wall of the guide block (31); the electrode head (32) contacts and fits with the secondary coil (33) and is electrically conductive with the secondary coil (33); and both ends of the primary coil (35) are connected to an external AC power source.

6. A high reliability acid-making boiler according to claim 5, characterized in that: One end of one of the secondary coils (33) and an electrode head (32) matched with the secondary coil (33) are respectively connected to the connection terminals of the circulation pump (9).

7. The high reliability acid-making boiler according to claim 5, characterized in that: One end of another secondary coil (33) and an electrode head (32) matched with the secondary coil (33) are respectively connected to the connection terminals of the air intake fan (23).

8. The high reliability acid-making boiler according to claim 5, characterized in that: The telescopic device (40) for controlling the power change of the circulation pump (9) is a pneumatic telescopic rod, and the telescopic device (40) for controlling the power change of the intake fan (23) is an electromagnetic telescopic rod.

9. A high reliability acid-making boiler according to claim 8, characterized in that: A heat sensing tube (36) is fixed to the inner wall of the exhaust duct (6), one end of the heat sensing tube (36) is blocked, the other end of the heat sensing tube (36) is connected to the pneumatic cavity of the pneumatic telescopic rod, and the interior of the heat sensing tube (36) is injected with a heat expansion medium; The thermal expansion medium is a mixed gas of nitrogen dioxide and nitrogen tetroxide.

10. The high reliability acid-making boiler according to claim 8, characterized in that: A light emitter (39) is clamped on the inner wall of one side of the exhaust duct (6), and a lens (38) and a photoelectric conversion plate (37) are respectively fixed on the inner wall of the exhaust duct (6) on the other side symmetrical to the light emitter (39), wherein the output end of the photoelectric conversion plate (37) is connected to the electromagnet of the electromagnetic telescopic rod.

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