Sulfuric acid production sulfur incinerator with air inlet dehumidification effect

Abstract

The present application relates to sulfuric acid preparation technical field, specifically to a kind of sulfur furnace with air inlet dehumidification effect for sulfuric acid preparation, including combustion chamber, air inlet chamber and waste heat recovery system, the left side of the combustion chamber is fixedly connected with the link cover, the front side of the link cover is fixedly connected with a primary air inlet pipe, the other end of the primary air inlet pipe is fixedly communicated with the top of air inlet chamber, the bottom of the air inlet chamber is fixedly connected with circulating tank, the rear side of the circulating tank is fixedly connected with airflow inlet pipe.The present application provides a kind of sulfur furnace with air inlet dehumidification effect for sulfuric acid preparation, has the temperature of new air temperature control with furnace gas waste heat, the temperature of dehumidification area is maintained in reasonable interval, both avoid low temperature increase cooling equipment load, also prevent high temperature cause concentrated sulfuric acid volatilization, effectively reduce water and electricity consumption, increase gas-liquid contact area, air inlet dehumidification is more thorough, furnace gas backflow is used for dehumidification area temperature, reduce waste heat recovery system working pressure, energy utilization rate is higher advantage.

Description

Technical Field

[0001] This invention relates to the field of sulfuric acid production technology, specifically to a sulfur incinerator with dehumidification function for sulfuric acid production. Background Technology

[0002] As is well known, the production of sulfuric acid from industrial sulfur is the mainstream process. It is simple and has low pollution. The process is divided into sulfur melting and incineration, furnace gas purification and drying, catalytic conversion, and sulfur trioxide absorption. The core reactions are as follows: sulfur is burned to produce sulfur dioxide, sulfur dioxide is catalytically oxidized to sulfur trioxide by vanadium catalyst, and sulfur trioxide is absorbed by concentrated sulfuric acid to produce sulfuric acid. In production, solid sulfur is first melted and sent to the sulfur incineration furnace. Dry air is introduced to burn and produce high-temperature furnace gas. After cooling and dust removal, and deep drying with concentrated sulfuric acid to remove impurities and moisture, the furnace gas enters the converter with a multi-layer catalyst bed. The temperature is controlled by the interlayer heat exchanger to complete the reversible catalytic reaction.

[0003] In existing sulfur incinerators, gas and sulfur are mostly introduced together from the first stage of the incinerator and undergo combustion reaction. Finally, the raw gas is discharged and converted after heat recovery. In order to ensure the combustion effect, the air entering the sulfur incinerator usually needs to be dehumidified in advance. The mainstream dehumidification method is to achieve physical absorption by absorbing water with concentrated sulfuric acid. However, if the temperature inside the furnace is too low, it will greatly increase the load on the acid cooler and air cooler, and increase the water and electricity consumption. If the temperature is too high, it will easily lead to increased volatility of concentrated sulfuric acid. At the same time, concentrated sulfuric acid is mostly sprayed as discrete droplets, and the contact area with air needs to be improved. Based on the above-mentioned situation, we found that existing sulfur incinerators have difficulty avoiding the above problems at the same time. Therefore, we propose a sulfur incinerator that can control the constant temperature of the inlet dehumidification zone of the sulfur incinerator, effectively utilize the heat of the raw material gas, reduce the continuous operating pressure of the waste heat recovery system, and improve the dehumidification effect. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a sulfur incinerator for sulfuric acid production with an air intake dehumidification effect. It has the advantages of being able to control the constant temperature of the air intake dehumidification zone of the sulfur incinerator, effectively utilizing the heat of the raw material gas, reducing the continuous operating pressure of the waste heat recovery system, and improving the dehumidification effect.

[0005] (II) Technical Solution The above-mentioned technical objective of the present invention is achieved through the following technical solution: a sulfur incinerator for sulfuric acid preparation with air intake dehumidification effect, comprising a combustion chamber, an air intake chamber and a waste heat recovery system, wherein a connecting cover is fixedly connected to the left side of the combustion chamber, a primary air intake pipe is fixedly connected to the front side of the connecting cover, the other end of the primary air intake pipe is fixedly connected to the top of the air intake chamber, a circulation tank is fixedly connected to the bottom of the air intake chamber, and an airflow inlet pipe is fixedly connected to the rear side of the circulation tank; An annular rib is fixedly connected to the inner side of the air intake chamber, and a dehumidifier is fixedly connected to the inner side of the annular rib. The bottom of the dehumidifier is fixedly connected to the air inlet chamber. A tail duct is fixedly connected to the front of the air inlet chamber. A raw material gas exhaust pipe is fixedly connected to the right side of the combustion chamber. A return pipe is fixedly connected to the rear side of the raw material gas exhaust pipe. The air inlet of the waste heat recovery system is fixedly connected to the bottom of the raw material gas exhaust pipe. A manifold is fixedly connected to the air outlet of the waste heat recovery system. The other end of the manifold is connected to the tail duct. A three-way confluence regulating valve is fixedly connected to the rear side of the air inlet chamber. The end of the return pipe away from the raw material gas exhaust pipe is fixedly connected to the three-way confluence regulating valve. A fresh air duct is fixedly connected to the top of the three-way confluence regulating valve.

[0006] Using the above technical solution, a combustion chamber is set up. Dry air from the intake chamber is introduced into the intake chamber through a primary intake pipe and then injected together with sulfur for combustion. The resulting raw material gas exits from the right tail of the combustion chamber and enters the waste heat recovery system through the raw material gas exhaust pipe. A portion of the heated raw material gas flows from the return pipe branch of the raw material gas exhaust pipe to the three-way merging regulating valve and enters the annular cavity between the dehumidification tank and the combustion chamber. Guided by the annular ribs, it is discharged from the tail duct. During this process, the temperature in the dehumidification tank can be kept from getting too low in a relatively cold external environment. When the external environment heats up, the three-way merging regulating valve can be controlled to reduce the high-temperature raw material gas entering through the return pipe. At the same time, a low-temperature airflow is blown in from the fresh air pipe, mixed, and enters the space between the intake chamber and the dehumidification tank to reduce or maintain the temperature in the dehumidification tank. Finally, the airflow is discharged from the tail duct and merges with the manifold pipe for easy input into the subsequent conversion system. This process also achieves preliminary dilution of the raw material gas concentration after waste heat recovery.

[0007] The present invention is further configured such that: a mixing tank is fixedly connected to the other end of the tail duct, a rear section pipe is fixedly connected to the bottom of the mixing tank, and an adjusting auxiliary pipe is fixedly connected to the top right side of the mixing tank.

[0008] Using the above technical solution, by setting up a mixing tank, the raw material gas output from the tail duct and the temperature control gas between the inlet chamber and the dehumidification tank will first enter the mixing tank to perform preliminary mixing of the airflow. If the concentration of raw material gas in the airflow is still too high, the concentration can be further diluted and controlled by adjusting the auxiliary pipe to input dry air.

[0009] The present invention is further configured such that: the other end of the primary intake pipe is fixedly connected to a secondary intake pipe, the top of the regulating auxiliary pipe is connected to the secondary intake pipe, a flow regulating valve is installed on the inner side of both the secondary intake pipe and the regulating auxiliary pipe, and the side of the secondary intake pipe away from the primary intake pipe is fixedly connected to the front side of the combustion chamber.

[0010] By adopting the above technical solution, after the secondary air intake pipe is connected to the regulating auxiliary pipe, the corresponding flow regulating valve can be opened as needed to input secondary air into the combustion chamber to assist combustion or to input the raw material gas into the regulating auxiliary pipe to assist in diluting the raw material gas.

[0011] The present invention is further configured such that: an isolation plate is fixedly connected to the inner side of the mixing tank, a leakage hole is opened on the inner side of the isolation plate, a central shaft is rotatably connected to the inner side of the leakage hole, and a hollow blade is fixedly connected to the outer side of the central shaft.

[0012] By adopting the above technical solution, by setting an isolation plate, the airflow entering the mixing tank is initially blocked and forced to enter the bottom hollow blade rotation position through the leakage hole. As the hollow blade rotates, the airflow is mixed.

[0013] The invention is further configured such that: a heating wire is fixedly connected to the inner side of the hollow blade; a servo motor is fixedly connected to the top of the mixing tank; the bottom of the servo motor is fixedly connected to the central shaft; and thermometers and concentration detection devices are installed on the inner sides of the rear pipe, the combustion chamber, and the dehumidification tank.

[0014] Using the above technical solution, by setting heating wires, the temperature of the airflow can be adjusted to assist in the conversion process if the temperature of the cooling air mixed in at the front is too low. A servo motor is used to drive the central shaft to rotate. The thermometer in the combustion chamber monitors the sulfur combustion temperature to ensure complete combustion. The concentration device detects the original sulfur dioxide and residual oxygen concentrations. The dehumidification tank thermometer is used to regulate the temperature inside the tank to avoid high energy consumption at low temperatures or high volatilization at high temperatures of concentrated sulfuric acid. The concentration device detects the residual moisture and acid mist entrainment in the dry air to ensure that the intake air dehumidification meets the standards. The downstream tube thermometer monitors the final furnace gas temperature and links with the heating wires to supplement the temperature. The concentration device detects the finished product sulfur dioxide concentration, thereby adjusting the make-up air volume to stabilize the furnace gas parameters within the process requirements of the conversion process.

[0015] The present invention is further configured such that: a nozzle device is fixedly connected to the middle part of the inner side of the connecting cover, and an air guide plate is fixedly connected to the inner side of the connecting cover.

[0016] Using the above technical solution, a nozzle device is set up to spray sulfur materials, and a guide plate can guide the incoming airflow.

[0017] The present invention is further configured such that: the dehumidification tank includes a tank body, a demister, a spray pipe, a packing frame, and an auxiliary plate; the demister, spray pipe, packing frame, and auxiliary plate are all installed inside the tank body; the spray pipe is located at the bottom of the demister; the packing frame is located at the bottom of the spray pipe; the auxiliary plate is located at the bottom of the packing frame; the auxiliary plate has several through holes on its inner side; and the packing frame has ceramic random packing material on its inner side.

[0018] Using the above technical solution, a nozzle is installed to spray concentrated sulfuric acid into dry air. When the airflow passes through the ceramic random packing inside the packing frame, it carries tiny sulfuric acid droplets and liquid mist. The demister separates the liquid acid mist through inertial collision and interception, and the mist flows back to the bottom. The auxiliary plate continuously vibrates at high frequency and micro amplitude, causing the sulfuric acid falling on the plate surface to vibrate and bounce and briefly linger, forming a large number of tiny sulfuric acid droplets. At the same time, some sulfuric acid flows downward evenly through the openings in the plate, forming a counter-current convection. The upward air comes into contact with the continuous layer of sulfuric acid falling through the openings, initially absorbing moisture from the air. The air fully collides and contacts the tiny sulfuric acid droplets that bounce back and linger in the air, and the fine water vapor is deeply absorbed. The air rises and passes through the packing layer, coming into contact again with the sulfuric acid film attached to the surface of the packing. The top demister intercepts the liquid acid mist, purifies the airflow, and produces low-humidity clean air, which is then sent into the sulfur incinerator.

[0019] The invention is further configured such that: a fixed shaft is fixedly connected to the inner side of the tank body, the outer side of the fixed shaft is rotatably connected to an auxiliary plate, a lower shell is fixedly connected to the inner side of the tank body, an upper shell is slidably connected to the outer side of the lower shell, a spring is provided between the lower shell and the upper shell, a protective shell is fixedly connected to the bottom of the auxiliary plate, and a vibration motor is installed on the inner side of the protective shell.

[0020] By adopting the above technical solution, a fixed shaft is set for installing the auxiliary plate, and the auxiliary plate can move to a certain extent along the fixed shaft. The bottom of the auxiliary plate away from the fixed shaft is located at the top of the upper shell. The vibration motor provides rotation inside the protective shell while being protected, so that the auxiliary plate can generate high-frequency, low-amplitude rotation. When it falls and contacts the upper shell, the upper shell will slide along the lower shell. At this time, the spring is compressed and rebounds, which can play a buffering role.

[0021] The present invention is further configured such that: a replenishment pipe is fixedly connected to the rear side of the circulation tank, a water pump is fixedly connected to the front side of the circulation tank, a supply pipe is fixedly connected to the outlet end of the water pump, and the other end of the supply pipe is fixedly connected to the spray pipe.

[0022] By adopting the above technical solution, the sulfuric acid in the circulating tank can be replenished in a timely manner when the amount of sulfuric acid decreases by setting up a replenishment pipe, and the water pump is used to draw concentrated sulfuric acid through the replenishment pipe and supply it to the spray pipe.

[0023] The present invention is further configured such that: an isolation net is fixedly connected to the inner side of the circulation tank, and a recovery valve is fixedly connected to the bottom of the circulation tank.

[0024] By adopting the above technical solution, by setting up an isolation net, some of the precipitate can be blocked when concentrated sulfuric acid precipitates at the bottom of the circulation tank, preventing it from being drawn up in large quantities by the supply pipe. The set recovery valve can periodically discharge the concentrated sulfuric acid that has accumulated at the bottom for long-term treatment.

[0025] (III) Beneficial Effects Compared with the prior art, the present invention provides a sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation, which has the following beneficial effects: This sulfuric acid production process utilizes a sulfur incinerator with dehumidification function. A combustion chamber is incorporated, allowing dry air from the inlet chamber to be injected along with sulfur through a primary inlet pipe for combustion. The resulting raw material gas exits from the right end of the combustion chamber and enters the waste heat recovery system via a raw material gas exhaust pipe. A portion of the heated raw material gas flows from a branch of the exhaust pipe to a three-way merging regulating valve, then enters the annular cavity between the dehumidification tank and the combustion chamber. Guided by the annular ribs, it exits through the tail duct. This process helps maintain the temperature in the dehumidification tank in relatively cold external environments. When the external environment heats up, the three-way merging regulating valve can be controlled to reduce the amount of high-temperature raw material gas entering through the return pipe. Simultaneously, a low-temperature airflow is blown in from the fresh air duct, mixing and entering the space between the inlet chamber and the dehumidification tank to lower or maintain the temperature in the dehumidification tank. Finally, the airflow exits through the tail duct and merges with the manifold, facilitating its input into the subsequent conversion system. This process also allows for the initial dilution of the raw material gas concentration after waste heat recovery. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the connection of the air intake chamber in this invention; Figure 3 This is a schematic diagram of the connection of the dehumidifier tank in this invention; Figure 4 This is a schematic diagram of the connecting cover in this invention; Figure 5 This is a schematic diagram of the interior of the connecting cover in this invention; Figure 6 This is a schematic diagram of the air mixing tank in this invention; Figure 7This is a schematic diagram of the connection of the hollow blades in this invention; Figure 8 This is a rear view of the main structure in this invention; Figure 9 This is a schematic diagram of the connection of the auxiliary plate of the present invention.

[0027] In the diagram: 1. Combustion chamber; 2. Intake chamber; 3. Connecting cover; 4. Primary intake pipe; 5. Circulation tank; 6. Airflow inlet pipe; 7. Annular rib; 8. Dehumidifier tank; 81. Tank body; 82. Demister; 83. Nozzle; 84. Packing rack; 85. Auxiliary plate; 9. Exhaust duct; 10. Raw material gas exhaust pipe; 11. Return pipe; 12. Waste heat recovery system; 13. Combination pipe; 14. Three-way confluence regulating valve; 15. Fresh air duct; 16. Mixing tank; 17. Rear section pipe; 18. Adjustment auxiliary pipe; 19. Secondary air intake pipe; 20. Hollow blade; 21. Heating wire; 22. Servo motor; 23. Nozzle device; 24. Air guide plate; 25. Fixed shaft; 26. Upper shell; 27. Lower shell; 28. Vibration motor; 29. ​​Liquid replenishment pipe; 30. Water pump; 31. Supply pipe; 32. Isolation net; 33. Recovery valve; 34. Isolation disc; 35. Central shaft. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 Please see Figure 1-8 A sulfur incinerator for sulfuric acid preparation with dehumidification function includes a combustion chamber 1, an air inlet chamber 2 and a waste heat recovery system 12. A connecting cover 3 is fixedly connected to the left side of the combustion chamber 1, a primary air inlet pipe 4 is fixedly connected to the front side of the connecting cover 3, the other end of the primary air inlet pipe 4 is fixedly connected to the top of the air inlet chamber 2, a circulation tank 5 is fixedly connected to the bottom of the air inlet chamber 2, and an airflow inlet pipe 6 is fixedly connected to the rear side of the circulation tank 5. An annular rib 7 is fixedly connected to the inner side of the air intake chamber 2, and a dehumidifier 8 is fixedly connected to the inner side of the annular rib 7. The bottom of the dehumidifier 8 is fixedly connected to the air inlet chamber 2. The front side of the air inlet chamber 2 is fixedly connected to the tail air pipe 9. The right side of the combustion chamber 1 is fixedly connected to the raw material gas exhaust pipe 10. The rear side of the raw material gas exhaust pipe 10 is fixedly connected to the return pipe 11. The air inlet of the waste heat recovery system 12 is fixedly connected to the bottom of the raw material gas exhaust pipe 10. The air outlet of the waste heat recovery system 12 is fixedly connected to the manifold pipe 13. The other end of the manifold pipe 13 is connected to the tail air pipe 9. The rear side of the air inlet chamber 2 is fixedly connected to the three-way confluence regulating valve 14. The end of the return pipe 11 away from the raw material gas exhaust pipe 10 is fixedly connected to the three-way confluence regulating valve 14. The top of the three-way confluence regulating valve 14 is fixedly connected to the fresh air pipe 15. By setting up combustion chamber 1, dry air from intake chamber 2 is introduced into intake chamber 2 through primary intake pipe 4 and then injected together with sulfur for combustion. The raw material gas generated after combustion exits from the right tail of combustion chamber 1 and enters waste heat recovery system 12 through raw material gas discharge pipe 10. A portion of the raw material gas carrying heat will go from the return pipe 11 branched from raw material gas discharge pipe 10 to the three-way confluence regulating valve 14, and enter the annular cavity between dehumidification tank 8 and combustion chamber 1. Guided by annular rib 7, it will be discharged from tail duct 9. During this process, the temperature in dehumidification tank 8 can be kept from getting too low in a relatively cold external environment. When the external environment heats up, the three-way confluence regulating valve 14 can be controlled to reduce the return heat. The high-temperature raw material gas entering through the flow pipe 11 is mixed with the low-temperature airflow blown in through the fresh air pipe 15. After mixing, the mixture enters the space between the air inlet chamber 2 and the dehumidification tank 8 to reduce or maintain the temperature in the dehumidification tank 8. Finally, the airflow is discharged from the tail duct 9 and merges with the manifold 13 for easy input into the subsequent conversion system. This process can also achieve the initial dilution of the raw material gas concentration after waste heat recovery. The tank connection flange should be a high-pressure anti-corrosion flange with an inert gas protection ring. The weld seam at the structural connection should also be treated with overall anti-corrosion welding and pickling passivation. The airflow inlet pipe 6 relies on the blower to blow in fresh air. Therefore, the air supply pressure inside the dehumidification tank 8 is always higher than the pressure of the jacket furnace gas through the external equipment, which can also prevent the acidification of the incoming air from the pressure difference.

[0030] One end of the tail duct 9 is fixedly connected to a mixing tank 16. The bottom of the mixing tank 16 is fixedly connected to a rear section pipe 17. The top right side of the mixing tank 16 is fixedly connected to an adjusting auxiliary pipe 18. By setting up the mixing tank 16, the raw material gas output from the tail duct 9 and the temperature control gas between the air inlet chamber 2 and the dehumidifier 8 will first enter the mixing tank 16 to perform preliminary mixing of the airflow. If the concentration of the raw material gas in the airflow is still too high, dry air can be input through the adjusting auxiliary pipe 18 to further assist in dilution and control the concentration. The other end of the primary air inlet pipe 4 is fixedly connected to a secondary air inlet pipe 19. The top of the adjusting auxiliary pipe 18 is connected to the secondary air inlet pipe 19. The secondary intake pipe 19 is connected, and flow regulating valves are installed on the inner sides of both the secondary intake pipe 19 and the regulating auxiliary pipe 18. The side of the secondary intake pipe 19 away from the primary intake pipe 4 is fixedly connected to the front side of the combustion chamber 1. By setting the secondary intake pipe 19, after being connected to the regulating auxiliary pipe 18, the corresponding flow regulating valve can be opened as needed to input secondary intake air into the combustion chamber 1 to assist combustion or to input into the regulating auxiliary pipe 18 to assist in diluting the raw material gas. An isolation plate 34 is fixedly connected to the inner side of the air mixing tank 16. A leakage hole is opened on the inner side of the isolation plate 34. A central shaft 35 is rotatably connected to the inner side of the leakage hole. An air duct is fixedly connected to the outer side of the central shaft 35. The hollow blade 20, through the isolation plate 34, initially blocks the airflow entering the mixing tank 16 and forces it to enter the bottom hollow blade 20 through the leakage hole. As the hollow blade 20 rotates, airflow mixing is facilitated. A heating wire 21 is fixedly connected to the inner side of the hollow blade 20. A servo motor 22 is fixedly connected to the top of the mixing tank 16, and the bottom of the servo motor 22 is fixedly connected to the central shaft 35. Thermometers and concentration detection devices are installed inside the rear pipe 17, combustion chamber 1, and dehumidification tank 8. By setting the heating wire 21, if cooling air is mixed in from the front section before subsequent conversion operations... When the gas temperature is too low, it can assist in adjusting the temperature of the passing airflow. The servo motor 22 is used to drive the central shaft 35 to rotate. The thermometer and concentration detection device can detect the temperature of the raw material gas or air before the key process, the concentration of the raw material gas, and the acid mist content of the process air to be incinerated in the dehumidification tank 8 in the downstream pipe 17, combustion chamber 1, and dehumidification tank 8, so as to make timely adjustments. The nozzle device 23 is fixedly connected to the middle of the inner side of the connecting cover 3, and the air guide plate 24 is fixedly connected to the inner side of the connecting cover 3. The nozzle device 23 is used to spray sulfur material, and the air guide plate 24 can guide the input airflow.

[0031] Working principle of this embodiment: During operation, outside air enters the air inlet chamber 2 through the air inlet pipe 6, and is then transported to the interior of the connecting cover 3 through the primary air inlet pipe 4. This works in conjunction with the molten sulfur sprayed from the nozzle device 23 and the airflow guidance effect of the air guide plates 24. The connecting cover 3 is a semi-enclosed arc-shaped cavity with multiple air guide plates 24 arranged in an array inside. All air guide plates 24 are arranged in layers and at equal intervals along the arc of the cover. The air guide plates 24 are curved arc-shaped guide ribs, and the curvature of the plate surface matches the curvature of the connecting cover shell. Multiple independent arc-shaped airflow channels with gradually changing cross-sectional areas are formed between the plates. Dried outside air enters the cavity of the connecting cover 3, and the chaotic turbulent flow impacts the multiple layers of air guide plates 24. The arc-shaped plates cut and divert the overall airflow to independent channels between each pair of air guide plates, breaking up large-scale eddies and eliminating... Except for the intake air deflection and localized windless areas, the air and sulfur are fully mixed and sent into the combustion chamber 1 to complete the combustion reaction. The high-temperature raw material gas generated by combustion is divided into two paths through the raw material gas discharge pipe 10. One path enters the waste heat recovery system 12 to complete waste heat recovery and then merges into the tail air pipe 9 through the manifold pipe 13. The other path is delivered to the three-way merging regulating valve 14 through the return pipe 11. The equipment can dynamically mix the high-temperature return raw material gas and the ambient temperature fresh air supplied by the fresh air pipe 15 according to the ambient temperature. The mixed airflow enters the annular cavity between the intake chamber 2 and the dehumidification tank 8 to keep the dehumidification tank 8 at a constant temperature. In low-temperature environments, the high-temperature raw material gas is used to prevent the temperature of the dehumidification tank 8 from getting too low and the energy consumption of the cooling equipment from increasing. In high-temperature environments, the fresh air is used to cool down and suppress the concentration of sulfur. Sulfuric acid evaporates, and the temperature-controlled airflow finally exits from the tailpipe 9 and merges with the airflow in the confluence pipe 13. The merged airflow enters the mixing tank 16, and after being limited and guided by the isolation plate 34, it enters the lower part of the tank through the leakage hole. The servo motor 22 drives the central shaft 35 to drive the hollow blades 20 to rotate at high speed, forcibly and uniformly mixing the airflow. At the same time, the equipment monitors the operating parameters in real time through thermometers and concentration detection devices in the combustion chamber 1, dehumidification tank 8, and downstream pipe 17. If the airflow temperature is too low, the heating wire 21 inside the hollow blades 20 can be activated for auxiliary heating. The heating part of the heating wire 21 is always located inside the hollow cavity of the hollow blades 20. The hollow blades 20 serve as the heat transfer medium. The heating wire 21 itself does not come into contact with sulfur oxides or acid mist, while the blade material can be... Low-carbon molybdenum stainless steel or corrosion-resistant alloy should be used in conjunction with the lining and filling thermally conductive and insulating materials. The servo motor 22 is installed on the top of the mixing tank 16, that is, the top of the central shaft 35 is directly connected to the top of the mixing tank 16. Thus, as needed, a receiving coil and rectifier module can be built into the rotating end of the central shaft 35, and an external transmitting coil can be placed on the top of the mixing tank 16 to supply power to the heating wire 21 inside the blades in a non-contact manner. There will be no mechanical friction or electric sparks, so there is no need to worry about fire prevention and explosion prevention. If the concentration of the raw material gas is too high, dry air can be added to dilute it through the auxiliary pipe 18. At the same time, secondary air can be added to the combustion chamber 1 as needed through the secondary air inlet pipe 19 in conjunction with the flow regulating valve to assist the complete combustion of sulfur. Finally, the qualified gas flow after conditioning is transported to the subsequent conversion process through the downstream pipe 17.

[0032] Example 2 refer to Figure 2-3 A sulfuric acid production furnace with air intake dehumidification effect further includes a dehumidification tank 8, wherein the dehumidification tank 8 includes a tank body 81, a demister 82, a nozzle 83, a packing frame 84, and an auxiliary plate 85. The demister 82, nozzle 83, packing frame 84, and auxiliary plate 85 are all installed inside the tank body 81. The nozzle 83 is located at the bottom of the demister 82, the packing frame 84 is located at the bottom of the nozzle 83, and the auxiliary plate 85 is located at the bottom of the packing frame 84. The inner side of the auxiliary plate 85 has several through holes, and the inner side of the packing frame 84 is provided with ceramic random packing. By setting the nozzle 83, concentrated sulfuric acid is sprayed onto the dry air. When the airflow passes through the ceramic random packing inside the packing frame 84, it will carry tiny sulfuric acid droplets and liquid droplets, thus removing the harmful substances. The mist eliminator 82 separates the liquid acid mist through inertial collision and interception, allowing it to flow back to the bottom. The auxiliary plate 85 continuously vibrates at high frequency and micro-amplitude, causing the sulfuric acid falling on the plate surface to oscillate and rebound and briefly linger in the air, forming a large number of tiny sulfuric acid droplets. At the same time, some sulfuric acid flows evenly downward through the openings in the plate, forming a counter-current convection. The upward air comes into contact with the continuous layer of sulfuric acid falling through the openings, initially absorbing moisture from the air. The air fully collides and contacts the tiny sulfuric acid droplets that vibrate and rebound and linger in the air, deeply absorbing the fine water vapor. The air rises and passes through the packing layer, coming into contact again with the sulfuric acid film attached to the surface of the packing. The top mist eliminator 82 intercepts the liquid acid mist, purifies the airflow, and produces low-humidity clean air, which is then sent into the sulfur incinerator.

[0033] The tank body 81 is fixedly connected to a fixed shaft 25 on its inner side. The outer side of the fixed shaft 25 is rotatably connected to an auxiliary plate 85. A lower shell 27 is fixedly connected to the inner side of the tank body 81. An upper shell 26 is slidably connected to the outer side of the lower shell 27. A spring is provided between the lower shell 27 and the upper shell 26. A protective shell is fixedly connected to the bottom of the auxiliary plate 85. A vibration motor 28 is installed inside the protective shell. The fixed shaft 25 is used to install the auxiliary plate 85 and allows the auxiliary plate 85 to move to a certain extent along the fixed shaft 25. The bottom of the auxiliary plate 85, away from the fixed shaft 25, is located at the top of the upper shell 26. The vibration motor 28 provides rotation while being protected inside the protective shell, allowing the auxiliary plate 85 to generate high-frequency, low-amplitude rotation. When it falls and contacts the upper shell 26, the upper shell 26 will slide along the lower shell 27. At this time, the spring is compressed and rebounds, which can play a buffering role. The upper shell 26 and the lower shell 27... There are grooves and guide protrusions for sliding limit, which prevents the upper shell 26 from laterally deflecting, jamming, or the spring from being eccentrically stressed, thus preventing accelerated fatigue fracture. A replenishment pipe 29 is fixedly connected to the rear side of the circulation tank 5, and a water pump 30 is fixedly connected to the front side of the circulation tank 5. A supply pipe 31 is fixedly connected to the outlet end of the water pump 30, and the other end of the supply pipe 31 is fixedly connected to the spray pipe 83. By setting up the replenishment pipe 29, the sulfuric acid in the circulation tank 5 can be replenished in time when the storage level decreases. The water pump 30 is used to draw concentrated sulfuric acid through the replenishment pipe and supply it to the spray pipe 83. An isolation net 32 ​​is fixedly connected to the inner side of the circulation tank 5, and a recovery valve 33 is fixedly connected to the bottom of the circulation tank 5. By setting up the isolation net 32, when concentrated sulfuric acid precipitates at the bottom of the circulation tank 5, some of the precipitate can be blocked, preventing it from being drawn up by the supply pipe 31 in large quantities. The recovery valve 33 can periodically discharge the concentrated sulfuric acid that has accumulated at the bottom for long-term treatment.

[0034] The working principle of this embodiment is as follows: During operation, the concentrated sulfuric acid stored in the circulation tank 5 is drawn by the water pump 30 and transported to the spray pipe 83 inside the dehumidification tank 8 through the supply pipe 31 to achieve uniform spraying. At the same time, the replenishment pipe 29 can replenish the consumed concentrated sulfuric acid in real time, forming a continuous closed-loop liquid supply system. The air to be dehumidified flows from bottom to top through the internal structure of the dehumidification tank 8 to complete multi-stage dehumidification. First, the airflow passes through the bottom auxiliary plate 85. The vibration motor 28 drives the auxiliary plate 85 to swing around the fixed shaft 25 at high frequency and micro-amplitude, so that the concentrated sulfuric acid attached to the plate surface forms a continuous falling liquid layer and suspended micro acid mist, which forms convective contact with the upward air and initially adsorbs the moisture in the air. Then, the air continues to rise and passes through the packing frame 84, and interacts with the internal ceramic bulk packing. The sulfuric acid film adhering to the material surface makes full contact, further removing residual moisture. Finally, the airflow passes through the top demister 82, which completely intercepts the acid mist and droplets carried in the airflow through inertial collision and interception, ultimately obtaining low-humidity, clean, dry air, which is then sent to the sulfur incinerator to participate in the combustion reaction. During the operation, the swing end of the auxiliary plate 85 repeatedly contacts the upper shell 26. The spring compression and rebound between the lower shell 27 and the upper shell 26 achieves buffering and shock absorption, effectively reducing the impact of vibration on the equipment structure. At the same time, the isolation net 32 ​​inside the circulation tank 5 can intercept solid impurities in concentrated sulfuric acid, preventing impurities from entering the pipeline and dehumidifying tank 8 and causing blockage. The bottom recovery valve 33 can periodically discharge the waste residue and waste acid deposited in the tank.

[0035] In this document, the directional terms "front," "rear," "left," and "right" refer to the sulfur incinerator in its installed and operational state, excluding pipelines whose positions can be changed as needed. The mixing tank 16 is the foremost side, combustion chamber 1 is the rearmost side, and air inlet chamber 2 is the leftmost side. The raw material gas generated by sulfur combustion flows from left to right within the combustion chamber. When facing the direction of the raw material gas flow, the observer's left hand is "left," and their right hand is "right." Specifically, the left end of combustion chamber 1 is the air inlet, and the right end is the air outlet. Connecting cover 3... Located at the left end of combustion chamber 1, primary intake pipe 4 is connected to the front side of connecting cover 3 and extends forward. Intake chamber 2 is located at the left front of combustion chamber 1. Circulation tank 5 is located at the bottom of intake chamber 2. Raw material exhaust pipe 10 is connected to the right end of combustion chamber 1. Return pipe 11 is connected to the rear side of raw material exhaust pipe 10 and extends backward. Three-way confluence regulating valve 14 is located at the rear side of intake chamber 2. The above directional definitions are only used to describe the relative positional relationship between the components and do not constitute an absolute limitation on the scope of protection of this invention.

[0036] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur incinerator for sulfuric acid preparation with inlet dehumidification function, comprising a combustion chamber (1), an inlet chamber (2), and a waste heat recovery system (12), characterized in that: A connecting cover (3) is fixedly connected to the left side of the combustion chamber (1), and a primary air intake pipe (4) is fixedly connected to the front side of the connecting cover (3). The other end of the primary air intake pipe (4) is fixedly connected to the top of the air intake chamber (2). A circulation tank (5) is fixedly connected to the bottom of the air intake chamber (2), and an airflow inlet pipe (6) is fixedly connected to the rear side of the circulation tank (5). The inner side of the air inlet chamber (2) is fixedly connected to an annular rib (7), and the inner side of the annular rib (7) is fixedly connected to a dehumidifier (8). The bottom of the dehumidification tank (8) is fixedly connected to the air inlet chamber (2). The front side of the air inlet chamber (2) is fixedly connected to the tail air pipe (9). The right side of the combustion chamber (1) is fixedly connected to the raw material gas exhaust pipe (10). The rear side of the raw material gas exhaust pipe (10) is fixedly connected to the return pipe (11). The air inlet of the waste heat recovery system (12) is fixedly connected to the bottom of the raw material gas exhaust pipe (10). The air outlet of the waste heat recovery system (12) is fixedly connected to the manifold pipe (13).

2. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 1, characterized in that: The other end of the confluence pipe (13) is connected to the tail air pipe (9). A three-way confluence regulating valve (14) is fixedly connected to the rear side of the air inlet chamber (2). The end of the return pipe (11) away from the raw material gas outlet pipe (10) is fixedly connected to the three-way confluence regulating valve (14). A fresh air pipe (15) is fixedly connected to the top of the three-way confluence regulating valve (14). The other end of the tail duct (9) is fixedly connected to a mixing tank (16), the bottom of the mixing tank (16) is fixedly connected to a rear section pipe (17), and the top right side of the mixing tank (16) is fixedly connected to an adjusting auxiliary pipe (18).

3. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 2, characterized in that: The other end of the primary intake pipe (4) is fixedly connected to the secondary intake pipe (19). The top of the regulating auxiliary pipe (18) is connected to the secondary intake pipe (19). Flow regulating valves are installed on the inner sides of both the secondary intake pipe (19) and the regulating auxiliary pipe (18). The side of the secondary intake pipe (19) away from the primary intake pipe (4) is fixedly connected to the front side of the combustion chamber (1).

4. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 2, characterized in that: An isolation plate (34) is fixedly connected to the inner side of the mixing tank (16). A leakage hole is opened on the inner side of the isolation plate (34). A central shaft (35) is rotatably connected to the inner side of the leakage hole. A hollow blade (20) is fixedly connected to the outer side of the central shaft (35).

5. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 4, characterized in that: A heating wire (21) is fixedly connected to the inner side of the hollow blade (20), a servo motor (22) is fixedly connected to the top of the mixing tank (16), the bottom of the servo motor (22) is fixedly connected to the central shaft (35), and thermometers and concentration detection devices are installed on the inner sides of the rear pipe (17), the combustion chamber (1) and the dehumidification tank (8).

6. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 1, characterized in that: A nozzle device (23) is fixedly connected to the middle of the inner side of the connecting cover (3), and an air guide plate (24) is fixedly connected to the inner side of the connecting cover (3).

7. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 1, characterized in that: The dehumidification tank (8) includes a tank body (81), a demister (82), a nozzle (83), a packing frame (84), and an auxiliary plate (85). The demister (82), nozzle (83), packing frame (84), and auxiliary plate (85) are all installed inside the tank body (81). The nozzle (83) is located at the bottom of the demister (82), the packing frame (84) is located at the bottom of the nozzle (83), and the auxiliary plate (85) is located at the bottom of the packing frame (84). The auxiliary plate (85) has several through holes on its inner side, and the packing frame (84) has ceramic random packing on its inner side.

8. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 7, characterized in that: A fixed shaft (25) is fixedly connected to the inner side of the tank (81). The outer side of the fixed shaft (25) is rotatably connected to the auxiliary plate (85). A lower shell (27) is fixedly connected to the inner side of the tank (81). An upper shell (26) is slidably connected to the outer side of the lower shell (27). A spring is provided between the lower shell (27) and the upper shell (26). A protective shell is fixedly connected to the bottom of the auxiliary plate (85). A vibration motor (28) is installed on the inner side of the protective shell.

9. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 7, characterized in that: A replenishment pipe (29) is fixedly connected to the rear side of the circulation tank (5), and a water pump (30) is fixedly connected to the front side of the circulation tank (5). A supply pipe (31) is fixedly connected to the outlet end of the water pump (30), and the other end of the supply pipe (31) is fixedly connected to the spray pipe (83).

10. A sulfur incinerator with air intake dehumidification effect for sulfuric acid preparation according to claim 9, characterized in that: An isolation net (32) is fixedly connected to the inner side of the circulation tank (5), and a recovery valve (33) is fixedly connected to the bottom of the circulation tank (5).

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