Sulfur burning furnace for preparing sodium pyrosulfite

Abstract

The invention relates to the technical field of sulfur burning furnaces, and particularly discloses a sulfur burning furnace for preparing sodium pyrosulfite, which comprises a furnace body mechanism, an auxiliary burning mechanism is arranged below the furnace body mechanism, a separation mechanism is arranged outside the furnace body mechanism, and the furnace body mechanism comprises a furnace body, a fan, a tail gas pipe and a baffle plate. Unburned sulfur particles in tail gas are separated through the cyclone separator and collected into the dust collecting box, then the unburned sulfur particles are guided into the combustion channel of the auxiliary combustion mechanism to be subjected to secondary combustion, sulfur which is not fully utilized originally reacts again to generate sulfur dioxide gas, and therefore the utilization rate of sulfur is increased, energy waste is reduced, and the environment is protected. In addition, the retention time of the sulfur particles in the combustion channel is prolonged through the guiding effect of the spiral guide piece on the air flow and the structural design of the communication position of the air guide hole and the combustion channel, so that the oxygen and the unburned sulfur particles can be fully mixed and completely combusted, and the generation and emission of sulfides can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sulfur incinerators, and in particular relates to a sulfur incinerator for preparing sodium pyrosulfite. Background Art

[0002] The sulfur incinerator for preparing sodium metabisulfite is a device used to burn sulfur to produce sulfur dioxide gas. Its core structure includes a combustion chamber, a sulfur feed system, and a gas outlet. Sulfur reacts with air in the combustion chamber to produce high-temperature sulfur dioxide gas, which is then used to react with sodium carbonate to eventually produce sodium metabisulfite.

[0003] In a sulfur incinerator for preparing sodium pyrosulfite with the announcement number CN221781239U, a sulfur incinerator for preparing sodium pyrosulfite is mentioned. Compared with the prior art, the utility model has the advantages of being able to filter the air entering the sulfur incinerator in advance, and at the same time facilitating the disassembly and cleaning of the filter element, thereby improving the combustion efficiency and the life of the equipment; Although the above-mentioned equipment has added a filter screen and a drying screen at the air inlet of the sulfur incinerator for preparing sodium metabisulfite, thereby drying the air before entering the sulfur incinerator, sulfur tail gas containing harmful gases such as hydrogen sulfide and sulfur dioxide will be generated after the air reacts with sulfuric acid in the sulfur incinerator, and these tail gases contain incompletely burned sulfur particles, resulting in energy waste and limiting the overall energy utilization efficiency. Summary of the invention

[0004] The object of the present invention is to provide a sulfur incinerator for preparing sodium pyrosulfite, so as to solve the problem in the prior art that incompletely burned sulfur particles are directly discharged, resulting in energy waste.

[0005] To achieve the above object, the present invention provides the following technical solutions: A sulfur incinerator for preparing sodium pyrosulfite comprises a furnace body mechanism, a secondary combustion mechanism is arranged below the furnace body mechanism, a separation mechanism is arranged outside the furnace body mechanism, the furnace body mechanism comprises a furnace body, a fan, an exhaust pipe and a baffle; the secondary combustion mechanism comprises a secondary combustion bottom plate, a combustion assembly and a heat conduction plug plate, the secondary combustion bottom plate is embedded below the furnace body, and the top of the secondary combustion bottom plate is fixedly connected with the secondary combustion top plate, the secondary combustion top plate fits the bottom of the furnace body, the combustion assembly is located between the secondary combustion bottom plate and the secondary combustion top plate, the heat conduction plug plate is plugged into the interior of the combustion assembly, and one end of the secondary combustion bottom plate is provided with an air intake end and an exhaust end; the combustion assembly comprises a heat insulation block, an air guide hole and a spiral guide vane, a combustion channel is opened inside the heat insulation block, the spiral guide vane is installed inside the combustion channel, and the air guide hole is evenly opened on both sides below the heat insulation block; the separation mechanism comprises a cyclone separator, a return pipe and a delivery pipe, one end of the return pipe is connected to the air intake end, and one end of the delivery pipe is connected to the exhaust pipe.

[0006] Preferably: one end of the combustion channel is an air inlet, and the other end is an exhaust port, the air inlet is connected to the air inlet end, the exhaust port is connected to the exhaust end, the spiral guide vane fits the inner wall of the combustion channel, and the spiral guide vane fits the two sides of the heat conductive plug plate, and the air guide hole is connected to the chord angle of the combustion channel.

[0007] Preferably: air supply pipes are arranged on both sides below the auxiliary combustion base plate, one end of the air supply pipes is connected to the fan through a hose, and the port at the other end of the air supply pipes is connected to the air guide hole, and an igniter 2 is installed below the auxiliary combustion base plate, and the end of the igniter 2 is located inside the combustion channel.

[0008] Preferably, evenly arranged plug-in convex plates are fixedly connected to the top of the heat-conducting plug-in plate, and the plug-in convex plates penetrate the auxiliary combustion top plate and are located inside the furnace body.

[0009] Preferably: a connected air inlet pipe is provided on one side of the cyclone separator, the other end of the delivery pipe is connected to the air inlet pipe, an exhaust pipe is provided above the cyclone separator, a dust box is provided at the lower end of the cyclone separator, and the other end of the return pipe is connected to the dust box.

[0010] Preferably, an induced draft fan 1 is arranged outside the delivery pipe, and an induced draft fan 2 is installed outside the return pipe.

[0011] Preferably: an igniter 1 is installed above the furnace body, and the end of the igniter 1 is located inside the furnace body, the baffles are evenly arranged and fixedly connected inside the furnace body, and a sulfur spray pipe is provided above the fan on the furnace body.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention separates unburned sulfur particles in the tail gas through a cyclone separator and collects them into a dust collecting box, and then introduces them into the combustion channel of the auxiliary combustion mechanism for secondary combustion, so that the sulfur that was originally not fully utilized can react again to generate sulfur dioxide gas, thereby improving the utilization rate of sulfur and reducing energy waste.

[0013] The present invention realizes heat transfer between the inside of the furnace and the combustion channel by means of the contact between the spiral guide vane and the heat-conducting plug plate and the structural design of the plug-in convex plate, preheats the combustion channel when it is not burning, reduces overall energy consumption, and further improves energy utilization efficiency.

[0014] The present invention extends the residence time of sulfur particles in the combustion channel during combustion by means of the guiding effect of the spiral guide vane on the airflow and the structural design of the connection between the air guide hole and the combustion channel, thereby allowing oxygen and unburned sulfur particles to be fully mixed and completely burned, and reducing the generation and emission of sulfides. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of the present invention as a whole; Figure 2 It is a schematic diagram of the internal structure of the furnace body mechanism of the present invention; Figure 3 It is a schematic diagram of the internal structure of the auxiliary combustion mechanism of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the combustion assembly of the present invention; Figure 5 It is a schematic diagram of the internal structure of the combustion assembly of the present invention; Figure 6 It is a structural schematic diagram of the separation mechanism of the present invention.

[0016] In the figure: 1. Furnace body structure; 11. Main combustion furnace body; 12. Sulfur spray pipe; 13. Fan; 14. Ignitor 1; 15. Tail gas pipe; 16. Baffle; 2. Auxiliary combustion mechanism; 21. Auxiliary combustion base plate; 22. Air supply pipe; 23. Air intake end; 24. Exhaust end; 25. Combustion assembly; 251. Heat insulation block; 252. Air guide hole; 253. Air inlet; 254. Exhaust port; 255. Spiral guide vane; 256. Combustion channel; 26. Heat-conducting plug plate; 27. Inserting convex plate; 28. Auxiliary combustion top plate; 29. ​​Ignitor II; 3. Separation mechanism; 31. Cyclone separator; 32. Air inlet pipe; 33. Exhaust pipe; 34. Dust collecting box; 35. Return pipe; 36. Delivery pipe; 37. Draft fan; 38. Blower. DETAILED DESCRIPTION

[0017] 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.

[0018] Reference Figures 1 to 6 As shown, the present invention provides a sulfur incinerator for preparing sodium pyrosulfite, comprising a furnace body mechanism 1, a secondary combustion mechanism 2 is arranged below the furnace body mechanism 1, a separation mechanism 3 is arranged outside the furnace body mechanism 1, and the furnace body mechanism 1 comprises a furnace body 11, a fan 13, an exhaust pipe 15 and a baffle 16; The fan 13 is used to introduce the external air into the furnace body 11 after filtering and drying, and can refer to the box in the announcement number CN221781239U; The auxiliary combustion mechanism 2 includes an auxiliary combustion bottom plate 21, a combustion assembly 25 and a heat-conducting plug plate 26. The auxiliary combustion bottom plate 21 is embedded under the furnace body 11, and the top of the auxiliary combustion bottom plate 21 is fixedly connected with an auxiliary combustion top plate 28, and the auxiliary combustion top plate 28 fits the bottom of the furnace body 11. The combustion assembly 25 is located between the auxiliary combustion bottom plate 21 and the auxiliary combustion top plate 28. The heat-conducting plug plate 26 is plugged into the interior of the combustion assembly 25. One end of the auxiliary combustion bottom plate 21 is provided with an air intake end 23 and an exhaust end 24. The combustion assembly 25 includes a heat insulation block 251, air guide holes 252 and a spiral guide vane 255. A combustion channel 256 is provided inside the heat insulation block 251. The spiral guide vane 255 is installed inside the combustion channel 256. The air guide holes 252 are evenly provided on both sides below the heat insulation block 251. The auxiliary combustion mechanism 2 is mainly used for secondary combustion of unburned sulfur particles; The separation mechanism 3 includes a cyclone separator 31, a return pipe 35 and a delivery pipe 36, one end of the return pipe 35 is connected to the air inlet end 23, and one end of the delivery pipe 36 is connected to the exhaust pipe 15; The separation mechanism 3 is used to separate the sulfur particles contained in the tail gas of the furnace body mechanism 1 and transport them to the auxiliary combustion mechanism 2 .

[0019] Reference Figures 4 to 5 In a further embodiment, one end of the combustion channel 256 is an air inlet 253, and the other end is an exhaust port 254, the air inlet 253 is connected to the air inlet end 23, the exhaust port 254 is connected to the exhaust end 24, the spiral guide vane 255 fits the inner wall of the combustion channel 256, and the spiral guide vane 255 fits the two sides of the heat conductive plug plate 26, and the air guide hole 252 is connected to the chord angle of the combustion channel 256.

[0020] In this embodiment, the cross-section of the combustion channel 256 is a U-shaped pipe, and there is a groove at the insertion point of the heat-conducting plug plate 26, so that the spiral guide plate 255 is in contact with the heat-conducting plug plate 26; the exhaust port 254 can re-introduce the exhaust gas into the interior of the cyclone separator 31 through the exhaust terminal 24 and the hose to form a circulation; the cross-section of the combustion channel 256 is circular and the place where the air guide hole 252 connects to the combustion channel 256 is the chord angle of the circle, so that when the air enters the interior of the combustion channel 256 through the air guide hole 252, it will flow in a spiral, and combined with the spiral guide plate 255, it can achieve continuous spiral flow.

[0021] Reference Figure 3 In a further embodiment, air supply pipes 22 are arranged on both sides below the auxiliary combustion base plate 21, one end of the air supply pipe 22 is connected to the fan 13 through a hose, and the port at the other end of the air supply pipe 22 is connected to the air guide hole 252, and an igniter 29 is installed below the auxiliary combustion base plate 21, and the end of the igniter 29 is located inside the combustion channel 256.

[0022] In this embodiment, a solenoid valve is provided at the air supply pipe 22, so as to control the air processed by the fan 13 to enter the combustion channel 256; the igniter 2 29 and the igniter 1 14 are both existing devices for ignition.

[0023] Reference Figures 2 to 3 In a further embodiment, the heat conductive plug plate 26 is fixedly connected with evenly arranged plug-in convex plates 27 above, and the plug-in convex plates 27 penetrate the auxiliary combustion top plate 28 and are located inside the furnace body 11.

[0024] In this embodiment, the plug-in protrusions 27 are distributed at the intervals of the baffles 16 to guide the gas flowing through the furnace body 11 .

[0025] Reference Figure 6 In a further embodiment, a connected air intake pipe 32 is provided on one side of the cyclone separator 31, the other end of the delivery pipe 36 is connected to the air intake pipe 32, an exhaust pipe 33 is provided above the cyclone separator 31, a dust box 34 is provided at the lower end of the cyclone separator 31, and the other end of the return pipe 35 is connected to the dust box 34.

[0026] In this embodiment, the cyclone separator 31, the air inlet pipe 32 and the exhaust pipe 33 constitute a cyclone separator which is mainly used to separate particles in the exhaust gas.

[0027] Reference Figure 6 In a further embodiment, an induced draft fan 37 is provided outside the delivery pipe 36 , and an induced draft fan 38 is installed outside the return pipe 35 .

[0028] In this embodiment, the induced draft fan 37 is used to accelerate the exhaust gas in the furnace body 11 to the interior of the cyclone separator 31. The cyclone separator forms a rotating airflow inside the exhaust gas containing sulfur particles, and uses centrifugal force to throw the sulfur particles to the wall of the device and settle them to the bottom ash hopper, and the purified gas is discharged from the top, thereby realizing the separation of sulfur particles and exhaust gas; the dust box 34 is the ash hopper, and there are valves on the top and bottom. When the bottom valve is opened, the top valve will be closed, thereby avoiding the influence of the induced draft fan 38 on the cyclone separator when it is running.

[0029] Reference Figure 1 to Figure 2 In a further embodiment, an igniter 14 is installed above the furnace body 11, and the end of the igniter 14 is located inside the furnace body 11, the baffles 16 are evenly arranged and fixedly connected inside the furnace body 11, and the furnace body 11 is provided with a sulfur spray pipe 12 above the fan 13.

[0030] In this embodiment, the furnace body 11, the sulfur spraying pipe 12, the fan 13, the igniter 14, the tail gas pipe 15 and the baffle 16 constitute a sulfur incinerator for preparing sodium metabisulfite in the prior art. A movable opening is opened at the bottom of the furnace body 11, so that the auxiliary combustion mechanism 2 can be embedded as a whole; the furnace body 11, the baffle 16, the auxiliary combustion top plate 28 and the insulation block 251 are all made of high temperature resistant, corrosion resistant and wear resistant materials; the heat conductive plug plate 26, the plug-in convex plate 27 and the spiral guide vane 255 are made of materials with good heat conductivity.

[0031] The working principle of the present invention is as follows: When external sulfur is injected into the furnace body 11 through the sulfur spray pipe 12 by a mechanical atomizing sulfur gun, and at the same time the fan 13 and the igniter 14 are in operation, the fan 13 will introduce the external air into the furnace body 11, and the igniter 14 will ignite, so that the sulfur is mainly burned inside the furnace body 11, and sulfur dioxide and other tail gases will be generated as the combustion continues and discharged through the tail gas pipe 15, and these tail gases also contain some unburned sulfur, so this part of the tail gas will be introduced into the cyclone separator 31 through the induced draft fan 37 and the conveying pipe 36, so that the unburned sulfur particles are separated from the exhaust gas, so that the unburned sulfur particles can be concentrated in the dust box 34; When a certain amount of unburned sulfur particles are collected inside the dust box 34, the bottom valve of the dust box 34 can be opened and the induced draft fan 2 38 can be started, so that the sulfur particles are introduced into the combustion channel 256 through the return pipe 35, and then the solenoid valve of the air supply pipe 22 is opened to allow the external air introduced from the fan 13 to enter the combustion channel 256 through the air supply pipe 22 and the air guide hole 252. Since the connection between the air guide hole 252 and the combustion channel 256 is the tangent angle of the cross section of the combustion channel 256, combined with the guidance of the spiral guide vane 255, the sulfur particles carried by the air flow are allowed to flow in a spiral manner, and then the igniter 29 is started to make the unburned sulfur particles burn again inside the combustion channel 256, thereby avoiding waste and improving energy utilization efficiency. In addition, since the spiral guide plate 255 is in contact with the heat-conducting plug plate 26, and the plug-in convex plate 27 on the top of the heat-conducting plug plate 26 is plugged into the inside of the furnace body 11, the temperature inside the furnace body 11 and the temperature inside the combustion channel 256 can be transferred to each other, so that the combustion channel 256 can be preheated when no combustion is taking place, thereby further improving the energy utilization efficiency. Due to the guidance of the airflow by the spiral guide vane 255 and the connection between the air guide hole 252 and the combustion channel 256, the residence time of the sulfur particles is extended when the sulfur particles burn inside the combustion channel 256, and the oxygen and unburned sulfur particles are fully mixed and burned, which effectively reduces the generation and emission of sulfides. At the same time, the secondary combustion of the exhaust gas can further decompose the residual sulfides, reduce the content of sulfides in the final exhaust gas, and reduce pollution to the atmospheric environment.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur incinerator for preparing sodium metabisulfite, comprising a furnace body structure (1), characterized in that: An auxiliary combustion mechanism (2) is arranged below the furnace body mechanism (1), a separation mechanism (3) is arranged outside the furnace body mechanism (1), and the furnace body mechanism (1) comprises a furnace body (11), a fan (13), an exhaust pipe (15) and a baffle (16); The auxiliary combustion mechanism (2) comprises an auxiliary combustion base plate (21), a combustion assembly (25) and a heat-conducting plug plate (26); the auxiliary combustion base plate (21) is embedded below the furnace body (11); the top of the auxiliary combustion base plate (21) is fixedly connected to an auxiliary combustion top plate (28); the auxiliary combustion top plate (28) fits the bottom of the furnace body (11); the combustion assembly (25) is located between the auxiliary combustion base plate (21) and the auxiliary combustion top plate (28); the heat-conducting plug plate (26) is plugged into the combustion assembly (25); and one end of the auxiliary combustion base plate (21) is provided with an air intake end (23) and an exhaust end (24); The combustion assembly (25) comprises a heat insulation block (251), air guide holes (252) and a spiral guide vane (255); a combustion channel (256) is provided inside the heat insulation block (251); the spiral guide vane (255) is installed inside the combustion channel (256); and the air guide holes (252) are evenly provided on both sides below the heat insulation block (251); The separation mechanism (3) comprises a cyclone separator (31), a return pipe (35) and a delivery pipe (36), one end of the return pipe (35) is connected to an air intake end (23), and one end of the delivery pipe (36) is connected to an exhaust pipe (15).

2. A sulfur incinerator for preparing sodium pyrosulfite according to claim 1, characterized in that: One end of the combustion channel (256) is an air inlet (253), and the other end is an exhaust port (254); the air inlet (253) is in communication with an air inlet end head (23), and the exhaust port (254) is in communication with an exhaust end head (24); the spiral guide vane (255) fits against the inner wall of the combustion channel (256), and the spiral guide vane (255) fits against both sides of the heat conduction plug plate (26); and the air guide hole (252) is in communication with the chord angle of the combustion channel (256).

3. A sulfur incinerator for preparing sodium metabisulfite according to claim 1, characterized in that: Air supply pipes (22) are arranged on both sides below the auxiliary combustion base plate (21); one end of the air supply pipe (22) is connected to the fan (13) via a hose; a port at the other end of the air supply pipe (22) is connected to the air guide hole (252); and a second igniter (29) is installed below the auxiliary combustion base plate (21); the end of the second igniter (29) is located inside the combustion channel (256).

4. A sulfur incinerator for preparing sodium metabisulfite according to claim 1, characterized in that: Evenly arranged and distributed plug-in convex plates (27) are fixedly connected above the heat-conducting plug-in plate (26); the plug-in convex plates (27) penetrate the auxiliary combustion top plate (28) and are located inside the furnace body (11).

5. A sulfur incinerator for preparing sodium metabisulfite according to claim 1, characterized in that: A communicating air intake pipe (32) is provided on one side of the cyclone separator (31), the other end of the delivery pipe (36) is connected to the air intake pipe (32), an exhaust pipe (33) is provided above the cyclone separator (31), a dust collecting box (34) is provided at the lower end of the cyclone separator (31), and the other end of the return pipe (35) is connected to the dust collecting box (34).

6. A sulfur incinerator for preparing sodium pyrosulfite according to claim 1, characterized in that: An induced draft fan 1 (37) is arranged outside the delivery pipe (36), and an induced draft fan 2 (38) is installed outside the return pipe (35).

7. A sulfur incinerator for preparing sodium metabisulfite according to claim 1, characterized in that: An igniter (14) is installed above the furnace body (11), and the end of the igniter (14) is located inside the furnace body (11). The baffles (16) are evenly arranged and fixedly connected inside the furnace body (11). The furnace body (11) is provided with a sulfur spray pipe (12) above the fan (13).

Images