Preheater in sulfuric acid recycling device

Abstract

The utility model discloses a preheater in a sulfuric acid recycling device, which belongs to the technical field of sulfuric acid recovery and comprises a preheating furnace, a first fixing plate and a first motor, the first fixing plate is fixedly connected to the surface of the preheating furnace, and the first motor is fixedly connected to the upper surface of the first fixing plate. The device has the beneficial effects that when oxide covering the surface of the heating pipe is cleaned, people control the first motor to move forwards and backwards at a certain frequency through the controller, so that the first rotating shaft and the gears are driven to rotate, and under the simultaneous cooperation of the two sets of gears and the racks, the oxide covering the surface of the heating pipe is cleaned. And each group of racks respectively drive the corresponding movable block, connecting plate, connecting rod, fixed ring and annular brush to move in sequence, so that the annular brush repeatedly brushes the surface of the corresponding heating pipe, and people can conveniently clean oxides covering the surface of the heating pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid recovery, and more specifically, to a preheater in a sulfuric acid recovery and utilization device. Background Art

[0002] The original air preheating process of the sulfuric acid recovery and utilization device is as follows: the air passes through the low-temperature air preheater and the high-temperature air preheater in sequence through the air blower, and then enters the cracking furnace after heat exchange with the high-temperature cracking furnace gas after the cracking furnace and the waste heat exchanger to ensure the oxygen consumption required for combustion in the cracking furnace; the high-temperature cracking gas comes out of the waste heat exchanger at a temperature of about 650°C, and the temperature is reduced to 350°C through the high-temperature air preheater, and then passes through the low-temperature heat exchanger to exchange heat with the fresh air transported by the air blower. The fresh air temperature is the outdoor temperature, which can be as low as -45°C in the northern cold regions. There is a large temperature difference between the fresh air of the low-temperature heat exchanger and the furnace air, which can easily cause stress cracking of the low-temperature air preheater. Therefore, a low-temperature air preheater needs to be added before the low-temperature air enters the high-temperature air preheater. The heating tube of the existing preheater is not easy to clean. After long-term use, the surface of the heating tube will be covered with oxides, which hinders the heat transfer between the heating tube and the heated material, thereby reducing the heating efficiency. In addition, most of the existing preheating devices are equipped with an air intake filter frame to filter impurities in the outside air. However, after long-term use, the air intake filter frame will be blocked by impurities in the outside air, affecting the air intake efficiency. To solve the above problems, we have launched the following device. Utility Model Content

[0003] (1) Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a preheater in a sulfuric acid recovery and utilization device, which has the characteristics of being easy to clean the oxides covering the surface of the heating tube and the impurities clogging the surface of the air intake filter frame.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides a preheater in a sulfuric acid recovery and utilization device, including a preheating furnace, a first fixed plate and a first motor, wherein the first fixed plate is fixedly connected to the surface of the preheating furnace, the first motor is fixedly connected to the upper surface of the first fixed plate, a first bearing is passed through the surface of the preheating furnace, a first rotating shaft is passed through the first bearing, one end of the first rotating shaft is fixedly connected to the other end of the output shaft of the first motor, and the other end of the first rotating shaft is fixedly connected to the first rotating shaft, a second bearing is passed through the inner wall of the preheating furnace, and the other end of the first rotating shaft is passed through the second bearing, a movable block is arranged inside the preheating furnace, a connecting plate is fixedly connected to the surface of the movable block, and there are two groups of connecting plates, and And it is symmetrically arranged on the surface of the movable block, the surface of the connecting plate is fixedly connected with a connecting rod, there are a plurality of connecting rods, and they are arranged on the surface of the connecting plate in a straight line with equal intervals, the other end of the connecting rod is fixedly connected with a fixing ring, the inner wall of the fixing ring is fixedly connected with an annular brush, a heating pipe is passed through the inside of the annular brush, the upper end of the heating pipe is passed through the surface of the preheating furnace, the lower end of the heating pipe is fixedly connected to the inner wall of the preheating furnace, a rack is fixedly connected to the surface of the movable block, a gear is fixedly connected to the surface of the first rotating shaft, the gear and the rack are meshed with each other, an air intake filter frame is passed through the surface of the preheating furnace, a dust removal assembly is arranged on the surface of the preheating furnace corresponding to the position of the air intake filter frame, and an air outlet pipe is passed through the upper surface of the preheating furnace.

[0007] When using a preheater in a sulfuric acid recovery and utilization device of the present technical solution, by setting a first motor, a gear, a rack and an annular brush, when cleaning the oxides covered on the surface of the heating tube, people control the first motor to operate forward and reversely at a certain frequency through a controller, thereby driving the first rotating shaft and the gear to rotate. With the simultaneous cooperation of the two sets of gears and racks, each set of racks drives the corresponding movable block, connecting plate, connecting rod, fixed ring and annular brush to move in turn, so that the annular brush repeatedly cleans the surface of the corresponding heating tube, thereby facilitating people to clean the oxides covered on the surface of the heating tube.

[0008] Further, the dust removal assembly includes a second fixed plate, a second motor is fixedly connected to the lower surface of the second fixed plate, the first fixed seat is fixedly connected to the surface of the preheating furnace, a third bearing is passed through the surface of the first fixed seat, a third rotating shaft is passed through the third bearing, an upper end of the third rotating shaft is fixedly connected to the other end of the output shaft of the second motor, a threaded column is fixedly connected to the lower end of the third rotating shaft, a fourth bearing is passed through the surface of the third rotating shaft, and a fourth rotating shaft is fixedly connected to the lower end of the threaded column. The second fixed seat is fixedly connected to the surface of the preheating furnace, a fourth bearing is passed through the surface of the second fixed seat, and the lower end of the fourth rotating shaft is passed through the fourth bearing, a threaded tube is threadedly connected to the surface of the threaded column, a dust removal brush is fixedly connected to the surface of the threaded tube, the dust removal brush is overlapped on the surface of the air intake filter frame, a limiting sleeve is fixedly connected to the surface of the dust removal brush, a limiting guide rod is passed through the limiting sleeve, the upper end of the limiting guide rod is fixedly connected to the lower surface of the first fixed seat, and the lower end of the limiting guide rod is fixedly connected to the upper surface of the second fixed seat.

[0009] Furthermore, a temperature sensor is fixedly connected to the inner wall of the preheating furnace.

[0010] Furthermore, a controller is fixedly connected to the surface of the preheating furnace.

[0011] Furthermore, an observation window is provided on the surface of the preheating furnace.

[0012] Furthermore, the bristles of the annular brush are made of metal, and the hardness of the bristles is less than the hardness of the heating tube material.

[0013] Furthermore, the bottom of the preheating furnace is fixedly connected with ground feet, and there are four groups of ground feet in total, which are arranged in a rectangular shape at the bottom of the preheating furnace.

[0014] (3) Beneficial effects

[0015] In summary, the utility model has the following beneficial effects:

[0016] The preheater in the sulfuric acid recovery and utilization device is provided with a first motor, a gear, a rack and an annular brush. When cleaning the oxides covered on the surface of the heating tube, people control the first motor to operate forward and reversely at a certain frequency through a controller, thereby driving the first rotating shaft and the gear to rotate. Under the simultaneous cooperation of two sets of gears and racks, each set of racks drives the corresponding movable block, connecting plate, connecting rod, fixed ring and annular brush to move in turn, so that the annular brush repeatedly cleans the surface of the corresponding heating tube, thereby facilitating people to clean the oxides covered on the surface of the heating tube;

[0017] The preheater in the sulfuric acid recovery and utilization device is provided with a second motor, a threaded column, a threaded tube and a dust removal brush. When cleaning impurities blocked on the surface of the air intake filter frame, people control the second motor to operate forward and reversely at a certain frequency through a controller, and the second motor drives the third rotating shaft and the threaded column to rotate in turn. Under the mutual cooperation of the threaded column and the threaded tube, the threaded tube moves and drives the dust removal brush to make reciprocating motion on the surface of the air intake filter frame, thereby facilitating people to clean the impurities blocked on the surface of the air intake filter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for describing the specific implementation or the prior art will be briefly introduced below. Obviously, the drawings described below are only one implementation of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model in a frontal perspective;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model in a frontal three-dimensional cross-sectional view;

[0021] Figure 3 It is a structural schematic diagram of the dust removal component of the utility model.

[0022] The markings in the accompanying drawings are:

[0023] 1. Preheating furnace; 2. First fixed plate; 3. First motor; 4. First bearing; 5. First rotating shaft; 6. Second bearing; 7. Movable block; 8. Connecting plate; 9. Connecting rod; 10. Fixed ring; 11. Annular brush; 12. Heating tube; 13. Rack; 14. Gear; 15. Inlet filter frame; 16. Dust removal assembly; 1601. Second fixed plate; 1602. Second motor; 1603. First fixed seat; 1604. Third bearing; 1605. Third rotating shaft; 1606. Threaded column; 1607. Fourth rotating shaft; 1608. Second fixed seat; 1609. Fourth bearing; 1610. Threaded pipe; 1611. Dust removal brush; 1612. Limit sleeve; 1613. Limit guide rod; 17. Exit pipe; 18. Temperature sensor; 19. Controller; 20. Observation window; 21. Foot. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the technical scheme in the specific implementation mode of the utility model is clearly and completely described below to further illustrate the utility model. Obviously, the specific implementation mode described is only a part of the implementation mode of the utility model, rather than all styles. Example 1

[0025] The following is combined with Figure 1-3 The utility model is described in further detail.

[0026] See also Figure 1-3 The utility model provides a technical solution: a preheater in a sulfuric acid recovery and utilization device, comprising a preheating furnace 1, a first fixed plate 2 and a first motor 3, the first fixed plate 2 is fixedly connected to the surface of the preheating furnace 1, the first motor 3 is fixedly connected to the upper surface of the first fixed plate 2, a first bearing 4 is penetrated on the surface of the preheating furnace 1, a first rotating shaft 5 is penetrated in the first bearing 4, one end of the first rotating shaft 5 is fixedly connected to the other end of the output shaft of the first motor 3, the other end of the first rotating shaft 5 is fixedly connected to the first rotating shaft 5, a second bearing 6 is penetrated on the inner wall of the preheating furnace 1, the other end of the first rotating shaft 5 is penetrated in the second bearing 6, a movable block 7 is arranged inside the preheating furnace 1, a connecting plate 8 is fixedly connected to the surface of the movable block 7, there are two groups of connecting plates 8, and they are symmetrically arranged on the movable The surface of the block 7 and the surface of the connecting plate 8 are fixedly connected with connecting rods 9. There are multiple groups of connecting rods 9, which are arranged in a straight line and at equal intervals on the surface of the connecting plate 8. The other end of the connecting rod 9 is fixedly connected with a fixing ring 10. The inner wall of the fixing ring 10 is fixedly connected with an annular brush 11. A heating tube 12 is penetrated inside the annular brush 11. The upper end of the heating tube 12 is penetrated on the surface of the preheating furnace 1, and the lower end of the heating tube 12 is fixedly connected to the inner wall of the preheating furnace 1. A rack 13 is fixedly connected to the surface of the movable block 7. A gear 14 is fixedly connected to the surface of the first rotating shaft 5. The gear 14 and the rack 13 are meshed with each other. An air intake filter frame 15 is penetrated on the surface of the preheating furnace 1. A dust removal assembly 16 is arranged on the surface of the preheating furnace 1 corresponding to the position of the air intake filter frame 15, and an air outlet pipe 17 is penetrated on the upper surface of the preheating furnace 1.

[0027] By adopting the above technical scheme, the preheater in the sulfuric acid recovery and utilization device is provided with a first motor 3, a gear 14, a rack 13 and an annular brush 11. When cleaning the oxides covered on the surface of the heating tube 12, people control the first motor 3 to operate forward and reversely at a certain frequency through the controller 19, thereby driving the first rotating shaft 5 and the gear 14 to rotate. Under the simultaneous cooperation of the two groups of gears 14 and the rack 13, each group of racks 13 respectively drives the corresponding movable block 7, the connecting plate 8, the connecting rod 9, the fixed ring 10 and the annular brush 11 to move in turn, so that the annular brush 11 repeatedly cleans the surface of the corresponding heating tube 12, thereby facilitating people to clean the oxides covered on the surface of the heating tube 12.

[0028] Specifically, the dust removal assembly 16 includes a second fixed plate 1601, a second motor 1602 is fixedly connected to the lower surface of the second fixed plate 1601, a first fixed seat 1603 is fixedly connected to the surface of the preheating furnace 1, a third bearing 1604 is passed through the surface of the first fixed seat 1603, a third shaft 1605 is passed through the third bearing 1604, an upper end of the third shaft 1605 is fixedly connected to the other end of the output shaft of the second motor 1602, a threaded column 1606 is fixedly connected to the lower end of the third shaft 1605, a fourth shaft 1607 is fixedly connected to the lower end of the threaded column 1606, and a second fixed seat 1608 is fixedly connected to the surface of the preheating furnace 1 A fourth bearing 1609 is penetrated on the surface of the second fixed seat 1608, and the lower end of the fourth rotating shaft 1607 is penetrated in the fourth bearing 1609. A threaded tube 1610 is threadedly connected to the surface of the threaded column 1606, and a dust removal brush 1611 is fixedly connected to the surface of the threaded tube 1610. The dust removal brush 1611 is overlapped on the surface of the air intake filter frame 15, and a limiting sleeve 1612 is fixedly connected to the surface of the dust removal brush 1611. A limiting guide rod 1613 is penetrated in the limiting sleeve 1612, and the upper end of the limiting guide rod 1613 is fixedly connected to the lower surface of the first fixed seat 1603, and the lower end of the limiting guide rod 1613 is fixedly connected to the upper surface of the second fixed seat 1608.

[0029] By adopting the above technical scheme, the preheater in the sulfuric acid recovery and utilization device is provided with a second motor 1602, a threaded column 1606, a threaded tube 1610 and a dust removal brush 1611. When cleaning impurities blocked on the surface of the air intake filter frame 15, people control the second motor 1602 to operate forward and reversely at a certain frequency through the controller 19, and the second motor 1602 drives the third rotating shaft 1605 and the threaded column 1606 to rotate in turn. Under the mutual cooperation of the threaded column 1606 and the threaded tube 1610, the threaded tube 1610 moves and drives the dust removal brush 1611 to reciprocate on the surface of the air intake filter frame 15, thereby facilitating people to clean impurities blocked on the surface of the air intake filter frame 15.

[0030] Specifically, a temperature sensor 18 is fixedly connected to the inner wall of the preheating furnace 1 .

[0031] Specifically, a controller 19 is fixedly connected to the surface of the preheating furnace 1 .

[0032] Specifically, an observation window 20 is provided on the surface of the preheating furnace 1 .

[0033] Specifically, the bristles of the annular brush 11 are made of metal, and the hardness of the bristles is less than the hardness of the heating tube 12 .

[0034] Specifically, the bottom of the preheating furnace 1 is fixedly connected with the ground feet 21 , and there are four groups of the ground feet 21 , which are arranged in a rectangular shape at the bottom of the preheating furnace 1 .

[0035] The working principle of the utility model is as follows: when in use, outside air enters the preheating furnace 1 from the air inlet filter frame 15, is heated by the heating tube 12 and then discharged from the air outlet pipe 17 to the next link. When the heating tube 12 has a poor heating effect on the air, it is necessary to clean the oxides covered on the surface of the heating tube 12. When cleaning the oxides covered on the surface of the heating tube 12, people control the first motor 3 to operate forward and reverse at a certain frequency through the controller 19, thereby driving the first rotating shaft 5 and the gear 14 to rotate. Under the simultaneous cooperation of the two sets of gears 14 and the rack 13, each set of racks 13 respectively drives the corresponding movable block 7, the connecting plate 8, the connecting rod 9, the fixed ring 10 and the annular brush 11 to move in turn, so that the annular brush 11 repeatedly heats the surface of the corresponding heating tube 12. The cleaning brush makes it easier for people to clean the oxides covering the surface of the heating tube 12 to restore the heating effect of the heating tube 12 on the air. When the surface of the air intake filter frame 15 is clogged with impurities that affect the outside air from entering the preheating furnace 1, people need to clean the air intake filter frame 15. When cleaning the impurities clogged on the surface of the air intake filter frame 15, people control the second motor 1602 to operate forward and reversely at a certain frequency through the controller 19. The second motor 1602 drives the third rotating shaft 1605 and the threaded column 1606 to rotate in turn. With the cooperation of the threaded column 1606 and the threaded tube 1610, the threaded tube 1610 moves and drives the dust removal brush 1611 to do reciprocating motion on the surface of the air intake filter frame 15, thereby making it easier for people to clean the impurities clogged on the surface of the air intake filter frame 15.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A preheater in a sulfuric acid recovery device, comprising a preheating furnace (1), a first fixed plate (2) and a first motor (3), characterized in that: The first fixing plate (2) is fixedly connected to the surface of the preheating furnace (1); the first motor (3) is fixedly connected to the upper surface of the first fixing plate (2); a first bearing (4) is passed through the surface of the preheating furnace (1); a first rotating shaft (5) is passed through the first bearing (4); one end of the first rotating shaft (5) is fixedly connected to the other end of the output shaft of the first motor (3); the other end of the first rotating shaft (5) is fixedly connected to the first rotating shaft (5); a second bearing (6) is passed through the inner wall of the preheating furnace (1); the other end of the first rotating shaft (5) is passed through the second bearing (6); a movable block (7) is arranged inside the preheating furnace (1); a connecting plate (8) is fixedly connected to the surface of the movable block (7); there are two groups of connecting plates (8) which are symmetrically arranged on the surface of the movable block (7); a connecting rod (9) is fixedly connected to the surface of the connecting plate (8); the connecting rod (9) There are a total of multiple groups, which are arranged in a straight line with equal spacing on the surface of the connecting plate (8); the other end of the connecting rod (9) is fixedly connected to a fixing ring (10); the inner wall of the fixing ring (10) is fixedly connected to an annular brush (11); a heating pipe (12) is passed through the inside of the annular brush (11); the upper end of the heating pipe (12) is passed through the surface of the preheating furnace (1); the lower end of the heating pipe (12) is fixedly connected to the inner wall of the preheating furnace (1); the surface of the movable block (7) is fixedly connected to a rack (13); the surface of the first rotating shaft (5) is fixedly connected to a gear (14); the gear (14) and the rack (13) are meshed with each other; the surface of the preheating furnace (1) is passed through an air intake filter frame (15); a dust removal component (16) is provided on the surface of the preheating furnace (1) at a position corresponding to the air intake filter frame (15); and the upper surface of the preheating furnace (1) is passed through an air outlet pipe (17).

2. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: The dust removal component (16) comprises a second fixing plate (1601), the lower surface of the second fixing plate (1601) is fixedly connected to a second motor (1602), the surface of the preheating furnace (1) is fixedly connected to a first fixing seat (1603), the surface of the first fixing seat (1603) is penetrated by a third bearing (1604), a third rotating shaft (1605) is penetrated through the third bearing (1604), the upper end of the third rotating shaft (1605) is fixedly connected to the other end of the output shaft of the second motor (1602), the lower end of the third rotating shaft (1605) is fixedly connected to a threaded column (1606), the lower end of the threaded column (1606) is fixedly connected to a fourth rotating shaft (1607), the surface of the preheating furnace (1) is fixedly connected to a second fixing seat (1608), A fourth bearing (1609) is passed through the surface of the second fixed seat (1608), and the lower end of the fourth rotating shaft (1607) is passed through the fourth bearing (1609). A threaded tube (1610) is threadedly connected to the surface of the threaded column (1606), and a dust removal brush (1611) is fixedly connected to the surface of the threaded tube (1610). The dust removal brush (1611) is overlapped on the surface of the air intake filter frame (15), and a limiting sleeve (1612) is fixedly connected to the surface of the dust removal brush (1611). A limiting guide rod (1613) is passed through the limiting sleeve (1612), and the upper end of the limiting guide rod (1613) is fixedly connected to the lower surface of the first fixed seat (1603), and the lower end of the limiting guide rod (1613) is fixedly connected to the upper surface of the second fixed seat (1608).

3. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: A temperature sensor (18) is fixedly connected to the inner wall of the preheating furnace (1).

4. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: A controller (19) is fixedly connected to the surface of the preheating furnace (1).

5. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: An observation window (20) is provided on the surface of the preheating furnace (1).

6. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: The bristles of the annular brush (11) are made of metal and have a hardness less than that of the material of the heating tube (12).

7. The preheater in the sulfuric acid recovery and utilization device according to claim 1, characterized in that: The bottom of the preheating furnace (1) is fixedly connected with feet (21), and there are four groups of the feet (21) in total, which are arranged in a rectangular shape at the bottom of the preheating furnace (1).

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