Device for recovering waste heat of acid-making reaction

Abstract

The utility model relates to the technical field of acid-making reaction waste heat recovery, and discloses an acid-making reaction waste heat recovery device which comprises a recovery box, the recovery box is in a hollow rectangular box shape with an open front wall face, through grooves are formed in the top and the bottom of the recovery box in a penetrating mode, and the front wall face of the recovery box is rotationally connected with a front baffle. An inlet hole is formed in the upper position of the front wall face of the front baffle, an outlet hole is formed in the lower position of the front wall face of the front baffle, the inlet hole and the outlet hole are communicated with the interior of the recycling box cavity, a recycling structure is arranged in the recycling box cavity and comprises a heat exchange pipe and an alignment plate, and the heat exchange pipe is clamped on the rear wall face of the front baffle in the recycling box cavity; the alignment plate is fixedly connected to the rear wall face of the front baffle in the recycling box cavity, and the recycling structure can recycle waste heat of smoke in the recycling box cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery of acid production reaction, and specifically relates to a device for recovering waste heat of acid production reaction. Background Art

[0002] Copper smelting flue gas purification is cooling, dust removal, SO3 and other impurities. The purification method is to wash with dilute acid to cool and remove these impurities. The washing liquid is originally process water. After circulating washing, it becomes a dilute acid with a temperature of 70°C and an acid concentration of 3.5% to 5%. It contains heavy metals such as arsenic trioxide, sulfur trioxide, carbon monoxide, copper oxide, and zinc oxide. For the normal production of sulfuric acid, the flue gas temperature out of the purification system must be within 40°C. Therefore, it can only be continuously added with dilute acid liquid after plate exchange or added with clean water to reduce the temperature of the dilute acid liquid; cooling in this way consumes electricity and water.

[0003] The heat recovery of the purified sulfuric acid flue gas brought into the purification system is almost zero, which aggravates the waste of resources and increases the manufacturing cost. The problem of waste heat recovery after purification has not been solved. Therefore, a device is needed to recycle the waste heat of the purified sulfuric acid flue gas in the acid production reaction.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A device for recovering waste heat from an acid-making reaction comprises a recovery box, which is in the shape of a hollow rectangular box with an open front wall, through grooves are provided on the top and bottom of the recovery box, a front baffle is rotatably connected to the front wall of the recovery box, an inlet hole is provided at an upper position of the front wall of the front baffle, an outlet hole is provided at a lower position of the front wall of the front baffle, the inlet hole and the outlet hole are connected to a cavity of the recovery box, a recovery structure is provided in the cavity of the recovery box, the recovery structure comprises a heat exchange tube and an alignment plate, the heat exchange tube is clamped on the rear wall of the front baffle in the cavity of the recovery box, the alignment plate is fixedly connected to the rear wall of the front baffle in the cavity of the recovery box, and the recovery structure can recover waste heat in the cavity of the recovery box.

[0007] As a preferred embodiment of the utility model, the heat exchange tube is a bow-shaped hollow tube, the cross-section of the heat exchange tube is circular, the upper opening of the heat exchange tube is connected to the inlet hole, the lower opening of the heat exchange tube is connected to the outlet hole, the alignment plates are symmetrically arranged on the wall surface of the front baffle, the symmetrical alignment plates are respectively clamped at the corresponding tortuous openings of the heat exchange tube, the thickness of the alignment plate is consistent with the height of each tortuous opening of the heat exchange tube, and the wall surface of the front baffle is evenly provided with multiple heat exchange tubes, inlet holes and outlet holes, and each heat exchange tube is connected to the inlet hole and outlet hole at the corresponding position.

[0008] As a preferred embodiment of the utility model, the recovery structure also includes a clamping block, and a plurality of clamping blocks are evenly and fixedly connected to the rear wall surface of the alignment plate. The number of clamping blocks on the wall surface of each alignment plate is consistent with the number of heat exchange tubes. The wall surface of each alignment plate is provided with a clamping block, and the rear wall surface of the clamping block is provided with a semicircular groove adapted to the cross-section of the heat exchange tube, and the wall surface of the heat exchange tube can be within the semicircular groove of the clamping block.

[0009] As a preferred embodiment of the utility model, the recovery structure also includes a rotating column, a clamping rod and a clamping plate. The rotating column is rotatably connected to the wall between the symmetrical alignment plates, the clamping rod is fixedly connected to the middle section of the rotating column, and the clamping plate is fixedly connected to the front wall of the clamping rod.

[0010] As a preferred embodiment of the utility model, the rotating column is cylindrical, and the upper and lower ends of the rotating column are respectively connected to the wall surfaces of the symmetrical alignment plates, and the clamping plate can enter the tortuous opening of the rear wall surface of the heat exchange tube, and the size of the clamping plate is consistent with the tortuous opening of the rear wall surface of the heat exchange tube.

[0011] As a preferred embodiment of the utility model, the recovery structure also includes a screw hole, a locking rod and a bolt. The screw hole is opened on the wall surface of the clamping rod, the locking rod is fixedly connected to the top of the lower alignment plate, and the bolt is threadedly connected in the screw hole.

[0012] As a preferred embodiment of the utility model, the rotating column and the locking rod are symmetrical to each other at both ends of the wall of the alignment plate, and the wall of the locking rod is also provided with the same screw holes. The bolts can pass through the screw holes on the wall of the clamping rod and the screw holes on the wall of the locking rod. When the front wall of the clamping rod and the rear wall of the locking rod are in contact, the clamping plate can enter the tortuous opening on the rear wall of the heat exchange tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The recovery structure can be used to recover the heat in the flue gas after acid production, because the recovery structure is set to flow water through the heat exchange tube cavity through the wall of the heat exchange tube to achieve heat exchange with the flue gas in the recovery box cavity, so as to prevent the loss of heat contained in the flue gas.

[0015] 2. The device can be easily maintained by providing heat exchange tubes that can be taken out separately, because each heat exchange tube on the wall of the alignment plate can be disassembled separately, and only the bolts need to be tightened during disassembly, thereby facilitating the maintenance of the device.

[0016] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture:

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 This is a perspective view of the interior of the recycling box of the utility model;

[0020] Figure 3 This is a rear perspective view of the front baffle of the utility model;

[0021] Figure 4 This is an exploded view of the bolt and the clamping rod of the utility model.

[0022] In the figure: 20, recovery box; 21, through groove; 22, front baffle; 23, inlet hole; 24, outlet hole; 30, heat exchange tube; 31, alignment plate; 32, clamping block; 33, rotating column; 34, clamping rod; 35, clamping plate; 36, screw hole; 37, locking rod; 38, bolt. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0024] like Figure 1 and Figure 2 As shown, a device for recovering waste heat of an acid-making reaction includes a recovery box 20. The recovery box 20 is in the shape of a hollow rectangular box with an open front wall. A through groove 21 is provided through the top and bottom of the recovery box 20. A front baffle 22 is rotatably connected to the front wall of the recovery box 20. An inlet hole 23 is provided at the upper position of the front wall of the front baffle 22, and an outlet hole 24 is provided at the lower position of the front wall of the front baffle 22. The inlet hole 23 and the outlet hole 24 are connected to the cavity of the recovery box 20, the through groove 21 at the bottom of the recovery box 20 is connected to the smoke exhaust pipe, the inlet hole 23 is connected to a water pipe, and the outlet hole 24 is connected to another water pipe. This is an existing technology and will not be described in detail here.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a recovery structure is arranged in the cavity of the recovery box 20, and the recovery structure includes a heat exchange tube 30 and an alignment plate 31. The heat exchange tube 30 is clamped on the rear wall surface of the front baffle plate 22 in the cavity of the recovery box 20, and the alignment plate 31 is fixedly connected to the rear wall surface of the front baffle plate 22 in the cavity of the recovery box 20. The recovery structure can recover the waste heat in the cavity of the recovery box 20.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the heat exchange tube 30 is a hollow tube in the shape of a bow, and the cross-section of the heat exchange tube 30 is circular. The upper opening of the heat exchange tube 30 is connected to the inlet hole 23, and the lower end opening of the heat exchange tube 30 is connected to the outlet hole 24. The alignment plates 31 are symmetrically arranged on the wall surface of the front baffle plate 22. The symmetrical alignment plates 31 are respectively stuck at the corresponding tortuous openings of the heat exchange tube 30. The thickness of the alignment plate 31 is consistent with the height of each tortuous opening of the heat exchange tube 30. The wall surface of the front baffle plate 22 is evenly provided with a plurality of heat exchange tubes 30, inlet holes 23 and outlet holes 24. Each heat exchange tube 30 is connected to the inlet hole 23 and the outlet hole 24 at the corresponding position. The recovery structure also includes a clamping block 32. The clamping block 32 is evenly fixedly connected to the rear wall surface of the alignment plate 31. The clamping block 32 has a plurality of The number of blocks 32 is consistent with the number of heat exchange tubes 30. The wall surface of each alignment plate 31 is provided with a clamping block 32. The rear wall surface of the clamping block 32 is provided with a semicircular groove adapted to the cross-section of the heat exchange tube 30. The wall surface of the heat exchange tube 30 can be in the semicircular groove of the clamping block 32. The recovery structure also includes a rotating column 33, a clamping rod 34 and a clamping plate 35. The rotating column 33 is rotatably connected to the wall surface between the symmetrical alignment plates 31. The clamping rod 34 is fixedly connected to the middle section of the rotating column 33. The clamping plate 35 is fixedly connected to the front wall surface of the clamping rod 34. The rotating column 33 is cylindrical. The upper and lower ends of the rotating column 33 are respectively connected to the wall surface of the symmetrical alignment plate 31. The clamping plate 35 can enter the tortuous opening of the rear wall surface of the heat exchange tube 30. The size of the clamping plate 35 is consistent with the tortuous opening of the rear wall surface of the heat exchange tube 30.

[0027] During specific use, the flue gas enters the cavity of the recovery box 20 from the through groove 21 at the bottom of the recovery box 20. At this time, the water pipe connected to the inlet hole 23 can pour water into the heat exchange tube 30. When the water flows into the heat exchange tube 30, it exchanges heat with the flue gas in the cavity of the recovery box 20 through the outer wall of the heat exchange tube 30, so that the residual heat of the flue gas in the cavity of the recovery box 20 is reused. Then, the flue gas flows out along the through groove 21 at the top of the recovery box 20. After the water flows into the cavity of the heat exchange tube 30 from the inlet hole 23, it flows along the cavity of the heat exchange tube 30 to the outlet hole 24 and enters the water pipe connected to the outlet hole 24, so as to collect the water after heat exchange.

[0028] In summary, by setting up a recovery structure, the heat in the flue gas after acid production can be recovered and utilized, because the recovery structure is set by setting the water flow in the cavity of the heat exchange tube 30 to achieve heat exchange with the flue gas in the cavity of the recovery box 20 through the wall of the heat exchange tube 30, so as to prevent the heat contained in the flue gas from being lost.

[0029] like Figure 4As shown, the recovery structure also includes a screw hole 36, a locking rod 37 and a bolt 38. The screw hole 36 is opened on the wall surface of the clamp rod 34. The locking rod 37 is fixedly connected to the top of the lower alignment plate 31. The bolt 38 is threadedly connected in the screw hole 36. The rotating column 33 and the locking rod 37 are symmetrical to each other at both ends of the wall surface of the alignment plate 31. The wall surface of the locking rod 37 is also opened with the same screw hole 36. The bolt 38 can pass through the screw hole 36 on the wall surface of the clamp rod 34 and the screw hole 36 on the wall surface of the locking rod 37. When the front wall surface of the clamp rod 34 and the rear wall surface of the locking rod 37 are in contact, the clamp plate 35 can enter the tortuous opening on the rear wall surface of the heat exchange tube 30.

[0030] When in use, the front baffle 22 is turned over, and the bolt 38 is screwed out of the screw hole 36. At this time, the clamping rod 34 can be turned over by the rotating column 33. When the clamping rod 34 is turned over, the clamping plate 35 will also be turned over at the same time. After the rotating column 33 is turned over, the heat exchange tube 30 can be taken out of the clamping block 32.

[0031] In summary, by providing heat exchange tubes 30 that can be taken out separately, it is convenient to maintain the device, because each heat exchange tube 30 on the wall of the alignment plate 31 can be disassembled separately, and only the bolts 38 need to be tightened during disassembly, thereby facilitating the inspection and maintenance of the device.

[0032] Working principle: The flue gas enters the cavity of the recovery box 20 from the groove 21 at the bottom of the recovery box 20. At this time, the water pipe connected to the inlet hole 23 can pour water into the heat exchange tube 30. When the water flows into the heat exchange tube 30, it will exchange heat with the flue gas in the cavity of the recovery box 20 through the outer wall of the heat exchange tube 30, so that the waste heat of the flue gas in the cavity of the recovery box 20 can be reused, and then the flue gas will flow out along the groove 21 at the top of the recovery box 20. After the water flows into the cavity of the heat exchange tube 30 from the inlet hole 23, it will flow along the cavity of the heat exchange tube 30 to the outlet hole 24 and enter the water pipe connected to the outlet hole 24, so as to collect the water after heat exchange.

[0033] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for recovering waste heat of an acid production reaction, comprising a recovery box (20), the recovery box (20) being in the shape of a hollow rectangular box with an open front wall, a through slot (21) penetrating the top and bottom of the recovery box (20), a front baffle (22) being rotatably connected to the front wall of the recovery box (20), an inlet hole (23) being provided at an upper position of the front wall of the front baffle (22), an outlet hole (24) being provided at a lower position of the front wall of the front baffle (22), the inlet hole (23) and the outlet hole (24) being connected to the cavity of the recovery box (20), characterized in that: A recovery structure is provided in the recovery box (20) cavity, the recovery structure comprising a heat exchange tube (30) and an alignment plate (31), the heat exchange tube (30) being clamped onto the rear wall surface of the front baffle plate (22) in the recovery box (20) cavity, the alignment plate (31) being fixedly connected to the rear wall surface of the front baffle plate (22) in the recovery box (20) cavity, and the recovery structure being capable of recovering residual heat in the recovery box (20) cavity.

2. The device for recovering waste heat from acid production reaction according to claim 1, characterized in that: The heat exchange tube (30) is in the shape of a bow-shaped hollow tube. The cross section of the heat exchange tube (30) is circular. The upper opening of the heat exchange tube (30) is connected to the inlet hole (23). The lower opening of the heat exchange tube (30) is connected to the outlet hole (24). The alignment plates (31) are symmetrically arranged on the wall surface of the front baffle (22). The symmetrical alignment plates (31) are respectively clamped at the corresponding zigzag openings of the heat exchange tube (30). The thickness of the alignment plates (31) is consistent with the height of each zigzag opening of the heat exchange tube (30). The wall surface of the front baffle (22) is evenly provided with a plurality of heat exchange tubes (30), inlet holes (23) and outlet holes (24). Each heat exchange tube (30) is connected to the inlet hole (23) and outlet hole (24) at a corresponding position.

3. The device for recovering waste heat from acid production reaction according to claim 1, characterized in that: The recovery structure further comprises a clamping block (32), a plurality of clamping blocks (32) being evenly fixedly connected to the rear wall surface of the alignment plate (31), the number of clamping blocks (32) on the wall surface of each alignment plate (31) being consistent with the number of heat exchange tubes (30), the wall surface of each alignment plate (31) being provided with a clamping block (32), the rear wall surface of the clamping block (32) being provided with a semicircular groove adapted to the cross section of the heat exchange tube (30), and the wall surface of the heat exchange tube (30) being able to fit within the semicircular groove of the clamping block (32).

4. The device for recovering waste heat from acid production reaction according to claim 3, characterized in that: The recycling structure further comprises a rotating column (33), a clamping rod (34) and a clamping plate (35); the rotating column (33) is rotatably connected to the wall surface between the symmetrical alignment plates (31); the clamping rod (34) is fixedly connected to the middle section of the rotating column (33); and the clamping plate (35) is fixedly connected to the front wall surface of the clamping rod (34).

5. The device for recovering waste heat from acid production reaction according to claim 4, characterized in that: The rotating column (33) is cylindrical, and the upper and lower ends of the rotating column (33) are respectively connected to the wall surface of the symmetrical alignment plate (31), and the clamping plate (35) can enter the zigzag opening of the rear wall surface of the heat exchange tube (30), and the size of the clamping plate (35) is consistent with the zigzag opening of the rear wall surface of the heat exchange tube (30).

6. The device for recovering waste heat from acid production reaction according to claim 4, characterized in that: The recovery structure further comprises a screw hole (36), a locking rod (37) and a bolt (38); the screw hole (36) is formed on the wall surface of the clamping rod (34); the locking rod (37) is fixedly connected to the top of the lower alignment plate (31); and the bolt (38) is threadedly connected in the screw hole (36).

7. The device for recovering waste heat from acid production reaction according to claim 6, characterized in that: The rotating column (33) and the locking rod (37) are symmetrical to each other at the two ends of the wall of the alignment plate (31), and the wall of the locking rod (37) is also provided with a similar screw hole (36). The bolt (38) can pass through the screw hole (36) on the wall of the clamping rod (34) and the screw hole (36) on the wall of the locking rod (37). When the front wall of the clamping rod (34) and the rear wall of the locking rod (37) are in contact, the clamping plate (35) can enter the zigzag opening on the rear wall of the heat exchange tube (30).

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