CN216972011U

CN216972011U - Sulfur combustion furnace for sodium sulfite production

Info

Publication number: CN216972011U
Application number: CN202220820444.XU
Authority: CN
Inventors: 许才发
Original assignee: Xuancheng Kaiang Chemical Co ltd
Current assignee: Xuancheng Kaiang Chemical Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-07-15
Anticipated expiration: 2032-04-11

Abstract

The utility model relates to the technical field of sodium sulfite preparation, in particular to a sulfur combustion furnace for sodium sulfite production. The combustion furnace comprises a horizontal shell and a motor; an inlet and an outlet are respectively arranged at two ends of the horizontal shell; the horizontal shell comprises a heat-insulating outer shell and an air-supplementing inner shell, an air-supplementing cavity is formed between the heat-insulating outer shell and the air-supplementing inner shell, and a combustion cavity is formed in the air-supplementing inner shell; a plurality of stop plates are arranged in the air supplementing inner shell, one end of each stop plate is connected with the inner wall of the air supplementing inner shell, and a flow guide part is formed between the other end of each stop plate and the inner wall of the air supplementing inner shell; the inner parts of the stop plates are hollow and are communicated with the air supplementing cavity, and the stop plates are provided with air holes. The sulfur gradually moves in the combustion furnace along the direction from the inlet to the outlet; meanwhile, the design of the stop plate with the air holes is matched to slow down the moving speed of the sulfur and continuously supplement oxygen to the sulfur in the moving process of the sulfur, so that the sulfur is fully combusted.

Description

Sulfur combustion furnace for sodium sulfite production

Technical Field

The utility model relates to the technical field of sodium sulfite preparation, in particular to a sulfur combustion furnace for sodium sulfite production.

Background

Sulfur dioxide is a necessary raw material in the production process of sodium sulfite, and the sulfur dioxide is generated by burning sulfur. The existing sulfur burning furnace directly burns granular, flaky and blocky sulfur in a semi-closed state, and has the defects of easy leakage of sulfur gas, environmental pollution, low combustion temperature, low efficiency, low sulfur gas concentration and difficult control of the combustion process. If the sulfur is directly combusted in a closed state, the problems of accurate metering of sulfur, air proportioning and gasification mixed flow cannot be solved, oxygen deficiency and incomplete combustion easily occur, and the problem of pipeline blockage caused by sulfur sublimation in serious cases can be solved. In addition, the traditional method changes sulfur into a molten state by using a steam heating or electric heating mode, the sulfur is sprayed into a closed hearth by a liquid sulfur pump for combustion, a large amount of energy is consumed in the process of melting solid sulfur into liquid, and although the combustion efficiency is high, the energy is consumed to melt the sulfur, so that the energy consumption is increased.

Patent document No. CN205709864U discloses a sulfur combustion furnace device for producing sodium metabisulfite, which comprises a combustion furnace, wherein a screw conveyor is arranged at the side of the combustion furnace, and a sulfur inlet hopper is arranged at the upper end of the screw conveyor; the top end of the sulfur inlet hopper is provided with a sulfur inlet, and the lower end of the sulfur inlet hopper is provided with a sulfur separating wheel; stirring blades are uniformly arranged on the main shaft of the spiral conveyor; the tail end of the screw conveyor is provided with a sulfur guiding port communicated with a combustion furnace; the bottom end of the outer cylinder of the spiral conveyor is provided with a filter plate; a sulfur powder channel is arranged below the filter plate and is positioned below the sulfur leading port; the outlet of the sulfur powder channel is communicated with the combustion furnace, and the inlet of the sulfur powder channel is connected with the air inlet pipe; an air guide groove is arranged below the sulfur powder channel; the outlet of the air guide groove is provided with an air curtain groove communicated with the combustion furnace, and the inlet of the air guide groove is connected with an air guide pipe; the air guide pipe is connected with the air inlet pipe.

In this application, sulfur and air are simultaneously fed into the combustion furnace at one time, and there is no air supplement structure, and there is a problem that oxygen in the combustion furnace is insufficient and combustion is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a sulfur combustion furnace for producing sodium sulfite.

The utility model provides a sulfur combustion furnace for producing sodium sulfite, which comprises a combustion furnace and a feeding structure for feeding materials into the combustion furnace, wherein the combustion furnace comprises a horizontal shell and a motor for driving the horizontal shell to rotate; an inlet and an outlet are respectively arranged at two ends of the horizontal shell; the horizontal shell comprises a heat-insulating outer shell and an air-supplementing inner shell, an air-supplementing cavity is formed between the heat-insulating outer shell and the air-supplementing inner shell, a combustion cavity is formed in the air-supplementing inner shell, the inlet and the outlet are both communicated with the combustion cavity, the inner wall of the air-supplementing inner shell comprises a sulfur bearing surface, and an acute angle is formed between the sulfur bearing surface and the horizontal plane; a plurality of stop plates are arranged in the air supplementing inner shell, one end of each stop plate is connected with the inner wall of the air supplementing inner shell, and a flow guide part is formed between the other end of each stop plate and the inner wall of the air supplementing inner shell; the inner parts of the stop plates are hollow, the stop plates are communicated with the air supplementing cavity, and a plurality of air holes are formed in one surfaces, close to the inlets, of the stop plates.

Preferably, the air supplementing inner shell is in a circular truncated cone shape and comprises a narrow end and a wide end; the narrow end is adjacent the inlet and the wide end is adjacent the outlet.

Preferably, the feeding structure comprises a feeding pipe, and the feeding pipe is connected with the inlet through a rotating bearing; the outlet is provided with a delivery pipe, and the delivery pipe is connected with an output shaft of the motor.

Preferably, the guide pipe is sleeved with a driven gear, an output shaft of the motor is sleeved with a driving gear, and the driven gear and the driving gear are in transmission through a chain or a transmission gear.

Preferably, the delivery pipe comprises an inner pipe and an outer pipe sleeved outside the inner pipe, one end of the inner pipe is communicated with the combustion cavity, and the other end of the inner pipe forms a sulfur dioxide outlet; an air supplementing channel is formed between the inner tube and the outer tube, one end of the air supplementing channel is communicated with the air supplementing cavity, and the other end of the air supplementing channel is communicated with an air supplementing fan.

Preferably, the feeding structure comprises a shell, and the shell comprises a feeding hole and a discharging hole communicated with the feeding pipe; and a spiral conveyor for conveying the material at the feed inlet to the discharge outlet is arranged in the shell.

Preferably, the screw conveyor includes a main shaft and a screw conveying blade provided on the main shaft; the main shaft is also provided with a crushing knife.

Preferably, a filter element is further arranged in the shell, the filter element is arranged below the spiral conveyor, a mixing cavity is formed between the filter element and the inner bottom of the shell, and the mixing cavity is communicated with the feeding pipe; the mixing device also comprises a mixing fan used for introducing air into the mixing cavity.

Preferably, the filter element is an elastic filter belt.

Preferably, a scraper is arranged in the mixing cavity, the scraper is connected with the side wall of the shell through an elastic piece, and the scraper comprises a scraping part abutted against the filter piece.

The utility model has the beneficial effects that:

in the application, a rotary horizontal shell is adopted, and sulfur gradually moves in the combustion furnace along the direction from an inlet to an outlet through an inclined sulfur bearing surface; meanwhile, the design of a plurality of stop plates with air holes is matched to slow down the moving speed of the sulfur and continuously supplement oxygen to the sulfur in the moving process of the sulfur, so that the sulfur is fully combusted.

Drawings

FIG. 1 is a schematic view of a sulfur burner for sodium sulfite production;

in the figure: the device comprises a combustion furnace 1, a horizontal shell 11, a heat preservation outer shell 111, an air supplementing inner shell 112, a stop plate 113, a flow guide part 114, a motor 12, a delivery pipe 13, a feeding structure 2, a feeding pipe 21, a spiral conveyor 22, a crushing knife 221 and a filter piece 23.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

A sulfur combustion furnace for producing sodium sulfite is shown in figure 1 and comprises a combustion furnace 1 and a feeding structure 2 for feeding materials into the combustion furnace 1.

The combustion furnace 1 includes a horizontal housing 11 and a motor 12 for driving the horizontal housing 11 to rotate.

The horizontal shell 11 is cylindrical, the axial direction of which is not vertical to the horizontal plane, two side surfaces of the horizontal shell are respectively provided with an inlet and an outlet, sulfur enters the horizontal shell 11 from the inlet to be combusted, and generated sulfur dioxide comes out from the outlet. In order to in the sulphur combustion process, mend the wind in order to solve the insufficient problem of burning to sulphur, horizontal casing 11 includes heat preservation shell 111 and mends wind inner shell 112, forms between heat preservation shell 111 and the mend wind inner shell 112 and mends the wind chamber, forms the burning chamber in the mend wind inner shell 112, import and export all with the burning chamber intercommunication, sulphur burns in the burning intracavity, mend wind inner shell 112 and be equipped with the wind hole that can mend the wind to the burning intracavity.

In order to avoid the influence of sulfur gathering at an inlet after the sulfur enters a combustion cavity of the horizontal shell 11, the inner wall of the air supplement inner shell 112 includes a sulfur bearing surface, the sulfur bearing surface is also the inner bottom surface of the air supplement inner shell 112 in a real-time state, and along with the rotation of the horizontal shell 11, any part of the inner wall of the air supplement inner shell 112 can be the inner bottom surface of the air supplement inner shell 112 when rotating to the lowest end, and at this time, the part is the sulfur bearing surface. The sulfur is gathered on the sulfur bearing surface, and the sulfur can slide along the sulfur bearing surface by making an acute angle between the sulfur bearing surface and the horizontal plane. The sulfur bearing surface can be formed in various ways, for example, an included angle is formed between the axial direction of the whole horizontal shell 11 and the horizontal plane, and at this time, the horizontal plane of the inlet is preferably higher than the horizontal plane of the outlet, which is helpful for the sulfur entering from the inlet to slowly move towards the outlet direction in the horizontal shell 11 under the action of the self gravity. For another example, in this embodiment, although the overall appearance of the horizontal housing 11 is that the axial direction is parallel to the horizontal plane, the inner casing 112 of the horizontal housing has a truncated cone shape, which includes a narrow end and a wide end; the narrow end is adjacent to the inlet and the wide end is adjacent to the outlet.

In order to improve the air supply efficiency of the sulfur, a plurality of stop plates 113 are arranged in the air supply inner shell 112; one end of the stop plate 113 is connected with the air supplement inner shell 112, and a flow guide part 114 is formed between the other end and the air supplement inner shell 112. The stopping plate 113 is hollow and communicated with the air supplementing cavity, and a plurality of air holes are formed in one surface, close to the inlet, of the stopping plate 113.

The arrangement of the plurality of stop plates 113 is various, for example, the air supplementing inner shell 112 is considered to include a first half shell and a second half shell, and the stop plates 113 may have one end connected to the inner wall of the first half shell and the other end connected to the inner wall of the second half shell to form a diversion portion 114. When the combustion chamber is used, when the first half shell is positioned below the second half shell, sulfur enters the combustion chamber from the inlet, is stopped between the side wall of the horizontal shell 11 and the first stop plate 113, and is subjected to air supplement combustion by the first stop plate 113; when the first half shell rotates above the second half shell along with the rotation of the horizontal shell 11, the sulfur can move back to between the first stop plate 113 and the second stop plate 113 through the diversion part 114 of the first stop plate 113; meanwhile, along with the rotation of the horizontal shell 11, the first half shell rotates to the lower part of the second half shell, and the sulfur is stopped between the first baffle 113 and the second baffle 113 and is combusted by the air supplemented by the second baffle 113. Thus, the sulfur can be continuously supplemented with air for combustion.

The arrangement of the plurality of stop plates 113 may also be, as in this embodiment, that one end of one stop plate 113 is connected to the inner wall of the first half-shell, and a flow guiding portion 114 is formed between the other end and the inner wall of the second half-shell, and that one end of the adjacent stop plate 113 is connected to the inner wall of the second half-shell, and a flow guiding portion 114 is formed between the other end and the inner wall of the first half-shell. The stopping manner is the same as that described above.

In order to drive the horizontal housing 11 to rotate around the axial direction thereof, maintain the stability of the horizontal housing 11, and facilitate the feeding and discharging of the horizontal housing 11, in the present embodiment, the feeding structure 2 includes a feeding pipe 21, and the feeding pipe 21 is connected with the inlet through a rotating bearing; the outlet is provided with a delivery pipe 13, and the delivery pipe 13 is connected with the output shaft of the motor 12. The feeding structure 2 is fixed on the ground or platform by a base, and thus the feeding pipe 21 is also fixed, and the feeding pipe 21 can be used as a supporting structure of one end of the horizontal housing 11 except the feeding function 21. Therefore, a fixed bracket is preferably also provided at the other end of the horizontal housing 11, and the delivery pipe 13 is connected to the fixed bracket through a rotating bearing. Meanwhile, in order not to affect the air guide function of the guide tube 13, the motor 12 is not directly connected with the guide tube 13, but a driven gear is sleeved outside the guide tube 13, a driving gear is sleeved on an output shaft of the motor 12, and the driven gear and the driving gear are driven by a chain or a transmission gear.

Because the air supplementing cavity needs to supplement air continuously and the combustion cavity needs to output the produced sulfur dioxide continuously in the application, the delivery pipe 13 comprises an inner pipe 131 and an outer pipe 132 sleeved outside the inner pipe 131, one end of the inner pipe 131 is communicated with the combustion cavity, and the other end of the inner pipe 131 forms a sulfur dioxide outlet; an air supplementing channel is formed between the inner tube 131 and the outer tube 132, one end of the air supplementing channel is communicated with the air supplementing cavity, and the other end of the air supplementing channel is communicated with an air supplementing fan.

In order to ensure the sufficient combustion of the sulfur, firstly, the sulfur needs to be continuously supplemented with air as described above; secondly, the surface area of the sulfur is required to be increased, and the contact degree of the sulfur and oxygen is improved. Therefore, in the present embodiment, the feeding structure 2 is designed. As shown in fig. 1, the feeding structure 2 comprises a housing, the housing comprises a feeding port and a discharging port communicated with a feeding pipe 21; a screw conveyor 22 for conveying the material at the feed inlet to the discharge outlet is arranged in the shell. The screw conveyor 22 includes a main shaft and a screw conveying blade provided to the main shaft; the main shaft is also provided with a crushing knife 221. The sulfur is simultaneously pulverized by the pulverizing knives 221 during the course of transporting the sulfur to increase the total surface area of the sulfur.

Furthermore, a filtering piece 23 is further arranged in the shell, the filtering piece 23 is arranged below the screw conveyor 22, a mixing cavity is formed between the filtering piece 23 and the inner bottom of the shell, and the mixing cavity is communicated with the feeding pipe 21; the mixing device also comprises a mixing fan used for introducing air into the mixing cavity. Through the setting of the mixing cavity, the sulfur is fully mixed with the air before entering the combustion cavity, and the combustion sufficiency of the sulfur is further improved.

The filter member 23 may be a filter plate or a filter belt, and in order to prevent sulfur from adhering to a solid portion of the filter member 23 or blocking the filter holes of the filter member 23, the filter member 23 is preferably an elastic filter belt, and a scraper 24 is disposed in the mixing chamber, the scraper 24 is connected to the side wall of the housing through an elastic member, and the scraper 24 includes a scraping portion abutting against the elastic filter belt. The scraping plate 24 is preferably a magnetic block, and a magnetic block which can be magnetically connected with the scraping plate 24 is additionally arranged outside the shell of the feeding structure 2, so that the elastic part can be contracted; when the magnetic block is taken away, the elastic piece is elastically expanded to push the scraper 24 to move, and the scraper 24 can scrape off sulfur attached to the filter piece 23 in the moving process and drive the elastic filter belt to vibrate and drop the sulfur attached to the elastic filter belt.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A sulfur combustion furnace for producing sodium sulfite comprises a combustion furnace (1) and a feeding structure (2) used for feeding materials into the combustion furnace (1), and is characterized in that: the combustion furnace (1) comprises a horizontal shell (11) and a motor (12) for driving the horizontal shell (11) to rotate; an inlet and an outlet are respectively arranged at two ends of the horizontal shell (11); the horizontal shell (11) comprises a heat-insulating outer shell (111) and an air supplementing inner shell (112), an air supplementing cavity is formed between the heat-insulating outer shell (111) and the air supplementing inner shell (112), a combustion cavity is formed in the air supplementing inner shell (112), an inlet and an outlet are communicated with the combustion cavity, the inner wall of the air supplementing inner shell (112) comprises a sulfur bearing surface, and an acute angle is formed between the sulfur bearing surface and the horizontal plane; a plurality of stopping plates (113) are arranged in the air supplementing inner shell (112), one end of each stopping plate (113) is connected with the inner wall of the air supplementing inner shell (112), and a flow guide part (114) is formed between the other end of each stopping plate and the inner wall of the air supplementing inner shell (112); the inner part of each stop plate (113) is hollow, the stop plates are communicated with the air supplementing cavity, and a plurality of air holes are formed in one surface, close to the inlet, of each stop plate (113).

2. The combustion furnace for producing sulfur from sodium sulfite according to claim 1, wherein: the air supplementing inner shell (112) is in a circular truncated cone shape and comprises a narrow end and a wide end; the narrow end is adjacent the inlet and the wide end is adjacent the outlet.

3. The combustion furnace for producing sulfur from sodium sulfite according to claim 1, wherein: the feeding structure (2) comprises a feeding pipe (21), and the feeding pipe (21) is connected with the inlet through a rotating bearing; the export is equipped with contact tube (13), contact tube (13) with the output shaft of motor (12).

4. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 3, wherein: the delivery tube (13) overcoat is equipped with driven gear, the output shaft cover of motor (12) is equipped with drive gear, driven gear with drive gear passes through chain or drive gear transmission.

5. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 4, wherein: the delivery pipe (13) comprises an inner pipe (131) and an outer pipe (132) sleeved outside the inner pipe (131), one end of the inner pipe (131) is communicated with the combustion cavity, and the other end of the inner pipe forms a sulfur dioxide outlet; an air supplementing channel is formed between the inner tube (131) and the outer tube (132), one end of the air supplementing channel is communicated with the air supplementing cavity, and the other end of the air supplementing channel is communicated with an air supplementing fan.

6. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 3, wherein: the feeding structure (2) comprises a shell, and the shell comprises a feeding hole and a discharging hole communicated with the feeding pipe (21); and a spiral conveyor (22) for conveying the material at the feeding hole to the discharging hole is arranged in the shell.

7. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 6, wherein: the spiral conveyor (22) comprises a main shaft and a spiral conveying sheet arranged on the main shaft; the main shaft is also provided with a crushing knife (221).

8. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 7, wherein: a filter element (23) is further arranged in the shell, the filter element (23) is arranged below the screw conveyor (22), a mixing cavity is formed between the filter element (23) and the inner bottom of the shell, and the mixing cavity is communicated with the feeding pipe (21); the mixing device also comprises a mixing fan used for introducing air into the mixing cavity.

9. The combustion furnace for producing sulfur from sodium sulfite of claim 8, wherein: the filter element (23) is an elastic filter belt.

10. The combustion furnace for producing sulfur from sodium sulfite as set forth in claim 8, wherein: be equipped with scraper blade (24) in the compounding intracavity, scraper blade (24) pass through the elastic component with the casing lateral wall is connected, scraper blade (24) including with filter piece (23) butt's scraping portion.