A sulfur-burning sulfuric acid plant with a cycle-switching intake path

Abstract

The utility model relates to a kind of sulphur acid-making sulphur incinerator of circulating switching air inlet path, including furnace body and furnace door;Two groups of air inlet pipes are symmetrically provided in the length direction along the two sides of furnace body, and the end of air inlet pipe near furnace door is communicated with the inside of furnace body, and smoke outlet is provided on the top of the end of furnace body away from furnace door;Control valve is provided at the mutual butt joint of two groups of air inlet pipes, control valve is connected with conveying pipe, and the valve stem of control valve is fixed with valve handle, and valve handle is connected control motor by special-shaped wheel structure;Control motor can drive valve handle periodic circulation activity by special-shaped wheel structure, to make control valve periodically switch on-off of two groups of air inlet pipes;Combustion-supporting gas is in overall spiral trend in hearth, and the air inlet pipe of two sides is periodically supplied with gas, which helps irregularly distributed sulfide in hearth to be fully incinerated;Air inlet pipe is periodically alternately supplied with gas, and different trend air current will not produce mutual butt.

Description

Technical Field

[0001] This utility model relates to an acid production technology, specifically a sulfuric acid production and incineration furnace with a circulating and switching air intake path. Background Technology

[0002] "Sulfur incineration" is the core step in the sulfur-to-acid process. Its task is to inject molten liquid sulfur and dry air into the sulfur incineration furnace, where it is rapidly burned at about 1100-1200℃ to generate SO2 gas, which provides raw material gas for the subsequent "flue gas absorption" acid production.

[0003] To ensure that sulfur can be fully burned, additional combustion-supporting gas is usually added to the furnace. However, in actual operation, it is necessary to ensure that the combustion-supporting gas covers the entire area of ​​the furnace as much as possible, and to ensure that the flue gas is discharged smoothly.

[0004] However, during the incineration process, the distribution of the sulfides to be incinerated in the furnace is not ideally uniform. It is precisely because of the uneven distribution of the sulfides to be incinerated in the furnace that the sulfur in the final incineration still has some areas that are not fully utilized. Utility Model Content

[0005] The purpose of this invention is to provide a sulfuric acid production furnace with a circulating and switching air intake path to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sulfuric acid combustion furnace with a circulating and switching air intake path includes a furnace body and a furnace door that can be opened and closed at an opening in the furnace body;

[0008] Two sets of air inlet pipes are symmetrically arranged on both sides of the furnace body along its length. The end of the air inlet pipe near the furnace door is connected to the interior of the furnace body, and a smoke exhaust port is provided above the end of the furnace body away from the furnace door.

[0009] A control valve is provided at the junction of the two sets of air intake pipes. The control valve is connected to the delivery pipe, and the valve stem and valve handle of the control valve are fixed together. The valve handle is connected to the control motor through a special-shaped wheel structure.

[0010] The control motor can drive the valve handle to cycle periodically through the irregular wheel structure, so that the control valve can periodically switch the opening and closing of the two sets of air intake pipes.

[0011] The sulfuric acid combustion furnace with cyclically switching air intake paths as described above: a mounting frame is fixed between one of the air intake pipes and the conveying pipe, the mounting frame is fixedly connected to the base via a crossbeam, and a bracket is installed on the base;

[0012] A slide rod is slidably mounted on the bracket. One end of the slide rod is fixed to the connector, and a first spring is provided between the connector and the bracket. The first spring is sleeved on the outside of the slide rod. One end of the first spring abuts against the bracket, and the other end abuts against the connector.

[0013] The connector connects the irregular wheel structure and the valve handle.

[0014] The sulfuric acid combustion furnace with cyclic switching of air intake path as described above: one end of the connecting member is rotatably provided with a contact roller, and the contact roller is in rolling cooperation with the irregular wheel structure;

[0015] The connector is also equipped with a guide rod, which slides with the bracket. A plug is fixedly installed at the end of the guide rod away from the connector. The plug is pivotally connected to one end of the connecting rod, and the other end of the connecting rod is pivotally connected to the end of the valve handle.

[0016] The sulfuric acid combustion furnace with cyclic switching of air intake path as described above: The irregular wheel structure includes a first sector component and a second sector component, both of which have a large arc portion and a small arc portion on their outer periphery. The large arc portion on the first sector component and the large arc portion on the second sector component are concentric and have the same diameter, and the small arc portion on the first sector component and the small arc portion on the second sector component are concentric and have the same diameter.

[0017] The first sector component and the second sector component are connected by a circumferential locking assembly.

[0018] The sulfuric acid combustion furnace with cyclically switching air intake paths as described above: the circumferential locking assembly includes a rotating column, one end of which is coaxially and fixedly connected to the output shaft of the control motor via a flange;

[0019] The rotating column is fixed to the second sector component, the first sector component is adjustablely sleeved on the rotating column, and a second spring is provided between the first sector component and the second sector component.

[0020] The second spring is a compression spring, and multiple continuous and evenly distributed toothed grooves are provided on the side wall of the through hole formed at the rotation center of the first sector component. The rotating column is provided with locking teeth that are adapted to the toothed grooves.

[0021] The sulfuric acid combustion furnace with cyclic switching of air intake path as described above: the end of the clamping tooth is triangular and sharp, and the two sides of the clamping tooth are straight parts parallel to the axis of the rotating column.

[0022] A raised portion is formed between two adjacent tooth grooves, and the end of the raised portion is also triangular and sharp, and the two sides of the raised portion are also flat surfaces.

[0023] The sulfur-based acid-making furnace with cyclically switching air intake paths as described above: a limiting post is fixedly installed on the second sector component, and a limiting groove adapted to the limiting post is installed on the first sector component.

[0024] The sulfur-based acid-making furnace with cyclically switching air intake paths as described above: a fixing component is fixedly installed on the side of the first sector component opposite to the second sector component, and an adjusting ring concentric with the rotating column is installed on the fixing component.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: the inlet pipe is connected to the inside of the furnace body at the bottom of the furnace near the furnace door, and the exhaust port is located at the top of the furnace away from the furnace door. The combustion-supporting gas is spirally oriented throughout the furnace. Moreover, the inlet pipes on both sides periodically circulate gas, which helps to fully burn the irregularly distributed sulfides in the furnace. In addition, because the inlet pipes on both sides periodically alternate in their circulation, the airflows in different directions will not collide with each other, thus affecting the flow speed of the airflow and facilitating rapid exhaust and combustion. Attached Figure Description

[0026] Figure 1 A schematic diagram of a sulfur-fired sulfuric acid production furnace with a circulating air intake path switching function.

[0027] Figure 2 A schematic diagram of the sulfur-based acid incinerator from another angle, showing the structure of the incinerator with a cyclically switching air intake path.

[0028] Figure 3 This is a schematic diagram of the structure after the furnace body and pipelines have been disassembled and separated.

[0029] Figure 4 In order to be in Figure 3 Based on this, only the schematic diagram of the pipeline structure is retained.

[0030] Figure 5 In order to be in Figure 4 This is a structural diagram showing the structure after removing part of the intake pipe and delivery pipe.

[0031] Figure 6 In order to be in Figure 5 This is a diagram showing the result after completely removing the intake and delivery pipes.

[0032] Figure 7 In order to be in Figure 6 This is a diagram showing the disassembly of the mounting frame, crossbeam, and base.

[0033] Figure 8 In order to be in Figure 7 The diagram shows the disassembled components, including the mounting bracket, crossbeam, base, slide bar, connectors, and bracket.

[0034] Figure 9This is a schematic diagram of an irregularly shaped wheel structure.

[0035] Figure 10 This is a schematic diagram of the irregular wheel structure from another angle.

[0036] Figure 11 This is a top view of the irregularly shaped wheel structure.

[0037] Figure 12 This is a schematic diagram showing the disassembled irregular wheel structure.

[0038] Figure 13 for Figure 12 Enlarged view of point A in the middle.

[0039] Figure 14 In order to be in Figure 12 The diagram shows the result after the rotating column is removed from the second sector component.

[0040] Figure 15 This is a schematic diagram showing the teeth after they have been removed from the rotating column.

[0041] In the diagram: 1-furnace body; 2-furnace door; 3-air inlet pipe; 4-conveying pipe; 5-control valve; 6-control motor; 7-valve handle; 8-connecting rod; 9-mounting bracket; 10-crossbeam; 11-base; 12-bracket; 13-slide rod; 14-first spring; 15-guide rod; 16-plug; 17-connector; 18-contact roller; 19-first sector component; 1901-limiting groove; 1902-tooth groove; 20-second sector component; 2001-limiting post; 21-adjusting ring; 22-fixing component; 23-second spring; 24-rotating column; 25-clamping tooth. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0043] Please see Figures 1-15 As an embodiment of the present utility model, the sulfur-based acid-making furnace with circulating and switching air intake paths includes a furnace body 1 and a furnace door 2 that can be opened and closed at the opening of the furnace body 1.

[0044] On both sides of the furnace body 1, two sets of air inlet pipes 3 are symmetrically arranged along its length. The end of the air inlet pipe 3 near the furnace door 2 is connected to the interior of the furnace body 1, and a smoke exhaust port is provided above the end of the furnace body 1 away from the furnace door 2.

[0045] A control valve 5 is provided at the junction of the two sets of air intake pipes 3. The control valve 5 is connected to the delivery pipe 4, and the valve stem of the control valve 5 is fixed to the valve handle 7. The valve handle 7 is connected to the control motor 6 through a special-shaped wheel structure.

[0046] The control motor 6 can drive the valve handle 7 to cycle periodically through the irregular wheel structure, so that the control valve 5 can periodically switch the opening and closing of the two sets of air intake pipes 3.

[0047] In this embodiment, when the sulfur incinerator is working, the furnace door 2 is in a closed state. Combustion-supporting gas is introduced into the left and right air inlet pipes 3 through the conveying pipe 4 and the control valve 5, and the flue gas is discharged through the exhaust port. Since the air inlet pipe 3 is connected to the interior of the furnace body 1 at the bottom of the furnace near the furnace door 2, while the exhaust port is located at the top of the furnace away from the furnace door 2, the combustion-supporting gas is spirally oriented throughout the furnace. Moreover, the air inlet pipes 3 on both sides periodically circulate gas, which helps to fully burn the irregularly distributed sulfides in the furnace. In addition, because the air inlet pipes 3 on both sides periodically alternate in their circulation, the airflows in different directions will not collide with each other, thus affecting the flow speed of the airflow, which is conducive to rapid exhaust and combustion.

[0048] As a further embodiment of this utility model, a mounting bracket 9 is fixed between one of the air intake pipes 3 and the delivery pipe 4. The mounting bracket 9 is fixedly connected to the base 11 via a crossbeam 10, and a bracket 12 is mounted on the base 11.

[0049] A slide rod 13 is slidably disposed on the bracket 12. One end of the slide rod 13 is fixed to the connector 17, and a first spring 14 is disposed between the connector 17 and the bracket 12. The first spring 14 is sleeved on the outside of the slide rod 13. One end of the first spring 14 abuts against the bracket 12, and the other end abuts against the connector 17.

[0050] The connector 17 connects the irregular wheel structure and the valve handle 7.

[0051] In this embodiment, when the control motor 6 is running, the slide bar 13 is driven by the irregular wheel structure to move back and forth alternately in a straight line along the constraint direction of the bracket 12 under the action of the first spring 14, thereby driving the valve handle 7 to swing periodically, so as to achieve the effect of controlling the combustion gas in the delivery pipe 4 to continuously switch between the air inlet pipes 3 on both sides.

[0052] As a further embodiment of this utility model, one end of the connecting member 17 is rotatably provided with a contact roller 18, and the contact roller 18 is in rolling cooperation with the irregular wheel structure.

[0053] A guide rod 15 is also installed on the connector 17. The guide rod 15 is slidably engaged with the bracket 12. A plug 16 is fixedly provided at the end of the slide rod 13 away from the connector 17. The plug 16 is pivotally connected to one end of the connecting rod 8, and the other end of the connecting rod 8 is pivotally connected to the end of the valve handle 7.

[0054] In this embodiment, the irregular wheel structure cooperates with the contact roller 18 to drive the connecting piece 17 and the slide rod 13 to move back and forth continuously under the action of the first spring 14, so as to drive the valve handle 7 to swing continuously through the connecting rod 8 to switch the conduction direction of the combustion gas between the air inlet pipes 3 on both sides.

[0055] As a further embodiment of this utility model, the irregular wheel structure includes a first sector-shaped component 19 and a second sector-shaped component 20. Both of them have a large arc-shaped portion and a small arc-shaped portion on their outer periphery. The large arc-shaped portion on the first sector-shaped component 19 and the large arc-shaped portion on the second sector-shaped component 20 are concentric and have the same diameter. The small arc-shaped portion on the first sector-shaped component 19 and the small arc-shaped portion on the second sector-shaped component 20 are concentric and have the same diameter.

[0056] The first sector component 19 and the second sector component 20 are connected by a circumferential locking assembly.

[0057] In this embodiment, the overlapping arc length of the large arc portion on the first sector 19 and the second sector 20 is adjusted by the circumferential locking component, and then the duration of the plug 16 being in a position away from the connector 17 is adjusted by the slide rod 13, that is, the opening and closing duration of the air inlet pipes 3 on both sides is adjusted to match the distribution state of sulfides in the furnace.

[0058] As a further embodiment of this utility model, the circumferential locking assembly includes a rotating column 24, one end of which is coaxially and fixedly connected to the output shaft of the control motor 6 via a flange.

[0059] The rotating column 24 is fixed to the second sector component 20, the first sector component 19 is adjustablely sleeved on the rotating column 24, and a second spring 23 is provided between the first sector component 19 and the second sector component 20.

[0060] The second spring 23 is a compression spring. Multiple continuous and evenly distributed toothed grooves 1902 are provided on the side wall of the through hole formed at the rotation center of the first sector 19. The rotating column 24 is provided with locking teeth 25 that are adapted to the toothed grooves 1902.

[0061] In this embodiment, the toothed groove 1902 and the locking tooth 25 cooperate with each other to ensure that the first sector 19 and the second sector 20 will not rotate relative to each other when subjected to tangential torque; only when the second spring 23 is further compressed under axial force can the toothed groove 1902 disengage from the locking tooth 25; after the toothed groove 1902 disengages from the locking tooth 25, the first sector 19 and the second sector 20 can be adjusted to rotate relative to each other, so as to adjust the overlapping arc length of the large arc portion on the first sector 19 and the second sector 20.

[0062] As a further embodiment of this utility model, the end of the locking tooth 25 is triangular and pointed, and the two sides of the locking tooth 25 are straight portions parallel to the axis of the rotating column 24.

[0063] A raised portion is formed between two adjacent tooth grooves 1902, the end of the raised portion is also triangular and sharp, and the two sides of the raised portion are also flat surfaces.

[0064] In this embodiment, when the tooth groove 1902 and the locking tooth 25 are engaged, the flat surface of the side of the raised portion and the flat portion of the side of the locking tooth 25 are in contact with each other. Therefore, when either the first sector member 19 or the second sector member 20 is subjected to torque, they will not rotate relative to each other. Only after the tooth groove 1902 and the locking tooth 25 are disengaged can they rotate relative to each other.

[0065] As a further embodiment of this utility model, a limiting post 2001 is fixedly provided on the second sector member 20, and a limiting groove 1901 adapted to the limiting post 2001 is provided on the first sector member 19.

[0066] In this embodiment, the limiting post 2001 and the limiting groove 1901 ensure that there is always an overlap between the large arc portion on the first sector 19 and the second sector 20, preventing over-adjustment from causing the large arc portion on the first sector 19 and the second sector 20 to completely disconnect.

[0067] As a further embodiment of this utility model, a fixing member 22 is fixedly provided on the side of the first sector member 19 opposite to the second sector member 20, and an adjusting ring 21 concentric with the rotating column 24 is installed on the fixing member 22.

[0068] In this embodiment, when it is necessary to adjust the overlapping arc length of the large arc portion on the first sector 19 and the second sector 20, the adjustment ring 21 is manually pressed to further compress the second spring 23, and the tooth groove 1902 is completely disengaged from the locking tooth 25; thereafter, the adjustment ring 21 can be rotated to drive the first sector 19 to rotate relative to the second sector 20.

[0069] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A sulfur-based acid-making furnace with a circulating and switching air intake path, comprising a furnace body (1) and a furnace door (2) operablely and closably disposed at an opening in the furnace body (1), characterized in that, On both sides of the furnace body (1), two sets of air inlet pipes (3) are symmetrically arranged along its length. The end of the air inlet pipe (3) near the furnace door (2) is connected to the interior of the furnace body (1), and a smoke exhaust port is provided above the end of the furnace body (1) away from the furnace door (2). A control valve (5) is provided at the junction of the two sets of air intake pipes (3). The control valve (5) is connected to the delivery pipe (4), and the valve stem of the control valve (5) is fixed to the valve handle (7). The valve handle (7) is connected to the control motor (6) through a special-shaped wheel structure. The control motor (6) can drive the valve handle (7) to cycle periodically through the irregular wheel structure, so that the control valve (5) periodically switches the opening and closing of the two sets of air inlet pipes (3).

2. A sulfur-based acid-making furnace with a circulating air intake path switching according to claim 1, characterized in that, A mounting bracket (9) is fixed between one of the air intake pipes (3) and the delivery pipe (4). The mounting bracket (9) is fixedly connected to the base (11) via a crossbeam (10). A bracket (12) is mounted on the base (11). A slide rod (13) is slidably disposed on the bracket (12). One end of the slide rod (13) is fixed to the connector (17), and a first spring (14) is disposed between the connector (17) and the bracket (12). The first spring (14) is sleeved on the outside of the slide rod (13). One end of the first spring (14) abuts against the bracket (12), and the other end abuts against the connector (17). The connector (17) connects the irregular wheel structure and the valve handle (7).

3. A sulfuric acid combustion furnace with a circulating air intake path switching according to claim 2, characterized in that, One end of the connector (17) is rotatably provided with a contact roller (18), and the contact roller (18) is in rolling cooperation with the irregular wheel structure; A guide rod (15) is also installed on the connector (17). The guide rod (15) is slidably engaged with the bracket (12). A plug (16) is fixedly installed at one end of the slide rod (13) away from the connector (17). The plug (16) is pivotally connected to one end of the connecting rod (8), and the other end of the connecting rod (8) is pivotally connected to the end of the valve handle (7).

4. A sulfuric acid combustion furnace with a circulating air intake path switching according to claim 1, characterized in that, The irregular wheel structure includes a first sector component (19) and a second sector component (20). Both of them have a large arc portion and a small arc portion on their outer periphery. The large arc portion on the first sector component (19) and the large arc portion on the second sector component (20) are concentric and have the same diameter. The small arc portion on the first sector component (19) and the small arc portion on the second sector component (20) are concentric and have the same diameter. The first sector component (19) and the second sector component (20) are connected by a circumferential locking assembly.

5. A sulfuric acid combustion furnace with a circulating air intake path switching according to claim 4, characterized in that, The circumferential locking assembly includes a rotating column (24), one end of which is coaxially and fixedly connected to the output shaft of the control motor (6) via a flange; The rotating column (24) is fixed to the second sector component (20), the first sector component (19) is adjustablely sleeved on the rotating column (24), and a second spring (23) is provided between the first sector component (19) and the second sector component (20). The second spring (23) is a compression spring. Multiple continuous and uniformly distributed toothed grooves (1902) are provided on the side wall of the through hole formed at the rotation center of the first sector (19). The rotating column (24) is provided with a locking tooth (25) that matches the toothed groove (1902).

6. A sulfuric acid production furnace with a circulating air intake path switching according to claim 5, characterized in that, The end of the tooth (25) is triangular and pointed, and the two sides of the tooth (25) are straight parts parallel to the axis of the rotating column (24); A raised portion is formed between two adjacent tooth grooves (1902), the end of the raised portion is also triangular and sharp, and the two sides of the raised portion are also flat surfaces.

7. A sulfuric acid combustion furnace with a circulating air intake path switching according to claim 5, characterized in that, The second sector component (20) is fixedly provided with a limiting post (2001), and the first sector component (19) is provided with a limiting groove (1901) that is compatible with the limiting post (2001).

8. A sulfuric acid combustion furnace with a circulating air intake path switching according to claim 5, characterized in that, A fixing member (22) is fixedly provided on the side of the first sector member (19) away from the second sector member (20), and an adjusting ring (21) concentric with the rotating column (24) is installed on the fixing member (22).

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