Sulfuric acid dropwise adding equipment for polyaluminum sulfate production

Abstract

The invention relates to the technical field of polyaluminum sulfate production, and discloses a sulfuric acid dropwise adding device for polyaluminum sulfate production, the sulfuric acid dropwise adding device comprises a sulfuric acid box and a cover plate connected to the sulfuric acid box, a heat exchange sleeve is installed in the sulfuric acid box, and a plurality of equidistant supporting legs are fixedly connected to the bottom of the heat exchange sleeve; the bottoms of the supporting legs are detachably connected with the bottom face of the inner wall of the sulfuric acid box, a heat exchange groove is formed in the heat exchange sleeve, one side of the top of the heat exchange sleeve is fixedly connected with a liquid inlet pipe communicated with the heat exchange groove, one side of the bottom of the heat exchange sleeve is fixedly connected with a liquid outlet pipe communicated with the heat exchange groove, and the outer wall of the sulfuric acid box is fixedly connected with a heater. According to the sulfuric acid dripping equipment for producing the polyaluminum sulfate, the heat exchange sleeve and the heater are matched with each other, so that the sulfuric acid can be heated on line, the sulfuric acid dripped into the reaction kettle has a certain temperature, the influence of low-temperature sulfuric acid on the temperature of a reaction system is reduced, and the reaction rate and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyaluminium sulfate production, in particular to a sulfuric acid dripping device for polyaluminium sulfate production. Background Art

[0002] Polyaluminium sulfate is an important inorganic polymer flocculant, which is widely used in the field of water treatment. It is a mixture composed of a series of polymerized aluminum ions, which has better flocculation effect and wider pH application range than traditional aluminum sulfate. In the preparation process of polyaluminium sulfate, sulfuric acid plays a vital role. It is not only one of the reactants, participating in the reaction of aluminum salt to form polyaluminium sulfate, but also affects the degree of polymerization and molecular weight of the product. The amount, concentration and method of sulfuric acid addition will affect the performance of the final product.

[0003] In the production process of polyaluminium sulfate, it is necessary to first add an aluminium sulfate solution into a reactor, and then slowly drip sulfuric acid into the aluminium sulfate solution through a dripping device, while controlling the temperature and pH value in the reactor, so as to obtain polyaluminium sulfate through the reaction. After the reaction is completed, it is necessary to perform a aging treatment to make the structure of polyaluminium sulfate more stable. After aging, the polyaluminium sulfate solution is filtered, washed and dried to obtain the final polyaluminium sulfate product.

[0004] As in the prior art, the patent with the patent authorization announcement number CN218689280U discloses a sulfuric acid dripping device for the production of polyaluminum sulfate, including a low-level sulfuric acid dripping device body installed on one side of the polyaluminum sulfate reactor, and the low-level sulfuric acid dripping device body includes a sulfuric acid tank. The above device can automatically pump and drip and measure the dripping amount according to actual needs through the cooperation of a diaphragm metering pump and a PCL controller, with a high degree of automation, and through the automatic metering dripping method, the unstable phenomenon of rate change caused by siphoning and the like is reduced, and the dripping rate is stable. By setting the sulfuric acid tank at a low position for pumping and dripping, the phenomenon of sulfuric acid overflowing at a high position is reduced, and the safety is improved. By setting the counterweight floating component, the lower touch switch and the alarm indication component, it can automatically alarm and remind personnel to add sulfuric acid in time when the sulfuric acid is about to run out and the liquid level is low, and by setting the rotary adjustment component, the alarm liquid level height can be adjusted according to actual needs.

[0005] However, the above-mentioned sulfuric acid addition equipment still has certain defects when used; since sulfuric acid is stored in a sulfuric acid tank before being added, the sulfuric acid tank cannot heat the sulfuric acid, which will cause the sulfuric acid to be added at a lower temperature. When this low-temperature sulfuric acid is added to the aluminum sulfate solution, it will not only reduce the temperature of the reaction system and affect the reaction rate and efficiency, but may also cause uneven reaction due to temperature differences, thereby affecting the degree of polymerization and molecular weight distribution of polyaluminum sulfate, and ultimately affecting the quality and performance of the product. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a sulfuric acid dripping device for the production of polyaluminium sulfate, which can preheat the sulfuric acid in the device.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a sulfuric acid dripping device for the production of polyaluminium sulfate, comprising a sulfuric acid box and a cover plate connected to the sulfuric acid box, a heat exchange jacket is installed in the sulfuric acid box, a plurality of equidistantly arranged supporting feet are fixedly connected to the bottom of the heat exchange jacket, the bottom of the supporting feet is detachably connected to the bottom surface of the inner wall of the sulfuric acid box, a heat exchange groove is provided in the heat exchange jacket, a liquid inlet pipe connected to the heat exchange groove is fixedly connected to one side of the top of the heat exchange jacket, a liquid outlet pipe connected to the heat exchange groove is fixedly connected to one side of the bottom of the heat exchange jacket, the liquid inlet pipe and the liquid outlet pipe both penetrate the side wall of the sulfuric acid box, a heater is fixedly connected to the outer wall of the sulfuric acid box, the ends of the liquid inlet pipe and the liquid outlet pipe outside the sulfuric acid box are fixedly connected to the heater, a cleaning component is connected to the top of the heat exchange jacket, and a moisture absorption component is connected to the bottom surface of the cover plate.

[0008] Furthermore, the cleaning component includes a fixed ring, a connecting ring, an injection head, a connecting pipe and a liquid inlet head. The top of the heat exchange sleeve is fixedly connected to a fixed ring, the top of the fixed ring is fixedly connected to a connecting ring, the inner and outer sides of the connecting ring are fixedly connected to multiple injection heads, a guide groove is provided in the connecting ring, the injection head and the guide groove are connected, a connecting groove connected to the guide groove is provided in the fixed ring, a connecting pipe connected to the connecting groove is fixedly connected to the top of the inner wall of the heat exchange groove, one end of the connecting pipe passes through the side wall of the sulfuric acid tank along the liquid inlet pipe, and penetrates the outer wall of the liquid inlet pipe near the heater, the end of the connecting pipe located outside the sulfuric acid tank is fixedly connected to the liquid inlet head, a sealing plug is detachably connected to the liquid inlet head, and a drain pipe is fixedly connected to the bottom of the sulfuric acid tank.

[0009] Furthermore, the desiccant component includes an adsorption tube, an adsorption block, an external threaded ring and an internal threaded ring. The bottom surface of the cover plate is connected to the adsorption tube. A plurality of air guide holes are opened on the outer wall of the adsorption tube. An external threaded ring is fixedly connected to the top of the adsorption tube. The outer wall of the external threaded ring is threadedly connected to the internal threaded ring. The adsorption block is located between the adsorption tube, the external threaded ring and the internal threaded ring.

[0010] Furthermore, a sliding groove corresponding to the position of the adsorption tube is opened on the surface of the cover plate, the bottom of the adsorption tube is fixedly connected to a bottom plate, and the top of the internal threaded ring is fixedly connected to a top plate, and the cross-sections of the bottom plate and the top plate are both larger than the adsorption tube.

[0011] Furthermore, two symmetrically arranged lower magnetic blocks are fixedly connected in the bottom plate, and two symmetrically arranged mounting grooves are provided inside the cover plate. A magnetic attraction block is fixedly connected in each mounting groove, and the magnetic attraction block corresponds to the position of the lower magnetic block.

[0012] Furthermore, two symmetrically arranged positioning posts are fixedly connected to the surface of the bottom plate, and a positioning groove corresponding to the position of the positioning posts is formed on the bottom surface of the cover plate.

[0013] Furthermore, two symmetrically arranged upper magnetic blocks are fixedly connected in the top plate, and the positions of the upper magnetic blocks and the magnetic attraction blocks correspond.

[0014] Furthermore, a handle is fixedly connected to the surface of the top plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The sulfuric acid dripping equipment for the production of polyaluminium sulfate can realize online heating of sulfuric acid through the cooperation of the heat exchange sleeve and the heater, thereby ensuring that the sulfuric acid dripped into the reactor has a certain temperature, reducing the influence of low-temperature sulfuric acid on the temperature of the reaction system, and improving the reaction rate and efficiency; by controlling the temperature of the heat medium, the heating temperature of the sulfuric acid can be accurately controlled to ensure the uniformity of the reaction system, thereby controlling the degree of polymerization and molecular weight distribution of polyaluminium sulfate, and improving the product quality and performance; at the same time, the viscosity of the heated sulfuric acid is reduced, the accuracy and uniformity of the dripping are also improved, reducing the problem of inaccurate dripping amount, and improving the production stability of polyaluminium sulfate;

[0017] (2) By using multiple spray heads connected to both sides of the connection ring, the inside of the sulfuric acid tank can be preliminarily cleaned before the staff manually cleans it, effectively removing the residual sulfuric acid and reducing the risk of direct contact of the staff with high-concentration sulfuric acid, thereby improving the safety and efficiency of the cleaning process;

[0018] (3) The adsorption block can absorb water vapor in the sulfuric acid box through the air guide holes, reduce the humidity in the box, and prevent water vapor from condensing and diluting sulfuric acid, thereby ensuring the stability of sulfuric acid concentration and providing reliable raw material guarantee for the subsequent production of polyaluminium sulfate;

[0019] (4) The splashing of sulfuric acid will be blocked by the bottom plate and the cover plate, thereby preventing sulfuric acid from corroding the adsorption block and causing it to fail. It can also prevent impurities generated during the corrosion of the adsorption block from contaminating the sulfuric acid, thereby ensuring the purity of the sulfuric acid and the smooth progress of the production process;

[0020] (5) By designing the magnetic attraction coordination between the magnetic block and the lower magnetic block, after the staff pull up the top plate, there is no need to continuously apply force to keep the bottom plate and the cover plate in contact. The magnetic attraction force can stably maintain the contact between the two, allowing the staff to loosen the top plate and use both hands to add sulfuric acid more freely, thereby improving the convenience and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention as a whole;

[0023] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the heat exchange jacket, the heater and the connecting ring of the present invention;

[0024] Figure 4 for Figure 3 An enlarged three-dimensional cross-sectional structural diagram at A above;

[0025] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the cover plate and the moisture absorption component of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional split cross-sectional structure of the moisture absorption component of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional split structure of the connecting pipe, the adsorption block and the internal thread ring of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional split cross-sectional structure of the connecting pipe, the internal thread ring and the external thread ring of the present invention.

[0029] In the figure: 1. sulfuric acid tank; 2. cover plate; 3. heat exchange sleeve; 4. supporting foot; 5. heat exchange groove; 6. liquid inlet pipe; 7. liquid outlet pipe; 8. heater; 9. fixing ring; 10. connecting ring; 11. guide groove; 12. injection head; 13. connecting groove; 14. connecting pipe; 15. liquid inlet head; 16. adsorption tube; 17. air guide hole; 18. adsorption block; 19. external thread ring; 20. internal thread ring; 21. sliding groove; 22. bottom plate; 23. top plate; 24. handle; 25. positioning column; 26. positioning groove; 27. installation groove; 28. magnetic block; 29. ​​upper magnetic block; 30. lower magnetic block; 31. drain pipe; 32. sealing plug. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See also Figures 1 to 8A sulfuric acid dripping device for producing polyaluminium sulfate comprises a sulfuric acid box 1 and a cover plate 2 connected to the sulfuric acid box 1, a heat exchange jacket 3 is installed in the sulfuric acid box 1, a plurality of equally spaced support legs 4 are fixedly connected to the bottom of the heat exchange jacket 3, the bottom of the support legs 4 is detachably connected to the bottom surface of the inner wall of the sulfuric acid box 1, a heat exchange groove 5 is provided in the heat exchange jacket 3, a liquid inlet pipe 6 connected to the heat exchange groove 5 is fixedly connected to one side of the top of the heat exchange jacket 3, a liquid outlet pipe 7 connected to the heat exchange groove 5 is fixedly connected to one side of the bottom of the heat exchange jacket 3, the liquid inlet pipe 6 and the liquid outlet pipe 7 both penetrate the side wall of the sulfuric acid box 1, a heater 8 is fixedly connected to the outer wall of the sulfuric acid box 1, the ends of the liquid inlet pipe 6 and the liquid outlet pipe 7 located outside the sulfuric acid box 1 are fixedly connected to the heater 8, a cleaning component is connected to the top of the heat exchange jacket 3, and a moisture absorption component is connected to the bottom surface of the cover plate 2.

[0032] The sulfuric acid dropping device for producing polyaluminium sulfate of the present invention, when in use, first injects sulfuric acid into the sulfuric acid tank 1, and the sulfuric acid contacts the heat exchange jacket 3 in the sulfuric acid tank 1, and then the heater 8 heats the heat medium (such as hot water or hot oil) in the liquid inlet pipe 6, the liquid outlet pipe 7 and the heat exchange jacket 3, and the heat medium circulates in the heat exchange tank 5 and transfers the heat to the sulfuric acid in contact with the heat exchange jacket 3, so as to heat the sulfuric acid, and the heated sulfuric acid is dropped into the reactor through a diaphragm metering pump connected to one side of the sulfuric acid tank 1 for reaction;

[0033] Through the cooperation between the heat exchange sleeve 3 and the heater 8, the device can realize online heating of sulfuric acid, ensure that the sulfuric acid added dropwise into the reactor has a certain temperature, reduce the influence of low-temperature sulfuric acid on the temperature of the reaction system, and improve the reaction rate and efficiency; by controlling the temperature of the heat medium, the heating temperature of the sulfuric acid can be accurately controlled to ensure the uniformity of the reaction system, thereby controlling the polymerization degree and molecular weight distribution of polyaluminum sulfate, and improving product quality and performance; at the same time, the viscosity of the heated sulfuric acid is reduced, the accuracy and uniformity of the addition are also improved, the problem of inaccurate addition amount is reduced, and the production stability of polyaluminum sulfate is improved.

[0034] As a preferred technical solution of the present invention, the cleaning component includes a fixing ring 9, a connecting ring 10, an injection head 12, a connecting pipe 14 and a liquid inlet head 15. The fixing ring 9 is fixedly connected to the top of the heat exchange sleeve 3, and the connecting ring 10 is fixedly connected to the top of the fixing ring 9. A plurality of injection heads 12 are fixedly connected to the inner and outer sides of the connecting ring 10. A guide groove 11 is provided in the connecting ring 10, and the injection head 12 is connected to the guide groove 11. A connecting groove 13 connected to the guide groove 11 is provided in the fixing ring 9. A connecting pipe 14 connected to the connecting groove 13 is fixedly connected to the top of the inner wall of the heat exchange groove 5. One end of the connecting pipe 14 passes through the side wall of the sulfuric acid tank 1 along the liquid inlet pipe 6 and penetrates the outer wall of the liquid inlet pipe 6 near the heater 8. The end of the connecting pipe 14 located outside the sulfuric acid tank 1 is fixedly connected to the liquid inlet head 15, and a sealing plug 32 is detachably connected to the liquid inlet head 15. A drain pipe 31 is fixedly connected to the bottom of the sulfuric acid tank 1.

[0035] Specifically, when the inside of the sulfuric acid tank 1 needs to be cleaned after production is completed, the sealing plug 32 is first removed from the liquid inlet head 15, and then a high-pressure water source such as a high-pressure water gun is connected to the liquid inlet head 15. At this time, the high-pressure water flow will enter the guide groove 11 through the connecting pipe 14 and the connecting groove 13, and then be sprayed out through the injection heads 12 on both sides of the connecting ring 10 to clean the inside of the sulfuric acid tank 1 and the inner and outer surfaces of the heat exchange sleeve 3. The sulfuric acid residue attached to the inside of the sulfuric acid tank 1 and the heat exchange sleeve 3 is removed by water flow, and the cleaned waste liquid will flow out through the drain pipe 31 for subsequent recovery and Discharge, at this time the initial cleaning is completed, and then the staff puts on gloves and uses a high-pressure water gun to directly flush the inside of the sulfuric acid tank 1, thereby completing the secondary cleaning. After the cleaning is completed, the liquid inlet head 15 is sealed again to complete the cleaning process and wait for the next reaction work; using the multiple injection heads 12 connected on both sides of the connecting ring 10, the inside of the sulfuric acid tank 1 can be preliminarily cleaned before the staff manually cleans it, effectively removing residual sulfuric acid, reducing the risk of direct contact between the staff and high-concentration sulfuric acid, thereby improving the safety and efficiency of the cleaning process.

[0036] As a preferred technical solution of the present invention, the desiccant component includes an adsorption tube 16, an adsorption block 18, an external threaded ring 19 and an internal threaded ring 20. The bottom surface of the cover plate 2 is connected to the adsorption tube 16. The outer wall of the adsorption tube 16 is provided with a plurality of air guide holes 17. The top of the adsorption tube 16 is fixedly connected to the external threaded ring 19. The outer wall of the external threaded ring 19 is threadedly connected to the internal threaded ring 20. The adsorption block 18 is located between the adsorption tube 16, the external threaded ring 19 and the internal threaded ring 20.

[0037] Specifically, the adsorption block 18 is filled with hygroscopic materials (such as silica gel, molecular sieve, etc.), which can effectively absorb water vapor; the adsorption block 18 can absorb water vapor in the sulfuric acid tank 1 through the air guide hole 17, reduce the humidity in the tank, prevent water vapor condensation and dilute sulfuric acid, thereby ensuring the stability of sulfuric acid concentration, and providing reliable raw material guarantee for subsequent polyaluminum sulfate production; when the adsorption block 18 is saturated with water, the adsorption block 18 can be taken out by unscrewing the internal threaded ring 20, and it can be replaced or regenerated.

[0038] As a preferred technical solution of the present invention, a sliding groove 21 corresponding to the position of the adsorption tube 16 is opened on the surface of the cover plate 2, the bottom of the adsorption tube 16 is fixedly connected to a bottom plate 22, and the top of the internal threaded ring 20 is fixedly connected to a top plate 23, and the cross-sections of the bottom plate 22 and the top plate 23 are both larger than the adsorption tube 16.

[0039] Specifically, when adding sulfuric acid into the sulfuric acid tank 1, the sulfuric acid may splash after entering the sulfuric acid tank 1, causing the sulfuric acid to contact the adsorption block 18 through the air guide hole 17 and corrode the adsorption block 18. In order to avoid this situation, when adding sulfuric acid, the staff can pull up the top plate 23 by hand, and then pull the internal thread ring 20, the external thread ring 19 and the adsorption tube 16 until the bottom plate 22 is in contact with the bottom surface of the cover plate 2. Then the staff can add sulfuric acid to the sulfuric acid tank 1. At this time, the sulfuric acid will be blocked by the bottom plate 22 and the cover plate 2 after splashing, thereby avoiding sulfuric acid from corroding the adsorption block 18 and causing it to fail, and also avoiding impurities generated during the corrosion of the adsorption block 18 to contaminate the sulfuric acid, thereby ensuring the purity of the sulfuric acid and the smooth progress of the production process.

[0040] As a preferred technical solution of the present invention, two symmetrically arranged lower magnetic blocks 30 are fixedly connected inside the bottom plate 22, and two symmetrically arranged mounting grooves 27 are provided inside the cover plate 2. A magnetic attraction block 28 is fixedly connected inside each mounting groove 27, and the magnetic attraction block 28 corresponds to the position of the lower magnetic block 30.

[0041] Specifically, after the staff pulls up the top plate 23, the magnetic block 28 will absorb the lower magnetic block 30, so that the bottom plate 22 and the bottom surface of the cover plate 2 are stably attached together. At this time, the staff can loosen the top plate 23 and use both hands to add sulfuric acid without holding the top plate 23 by hand. After the sulfuric acid is added, the staff pushes the top plate 23 again by hand to separate the lower magnetic block 30 from the magnetic block 28. The bottom plate 22 will automatically return to the sliding groove 21 under the action of gravity, and the adsorption component will resume normal working state without additional operation steps.

[0042] By designing the magnetic attraction cooperation between the magnetic block 28 and the lower magnetic block 30, after the staff pulls up the top plate 23, there is no need to continuously apply force to keep the bottom plate 22 and the cover plate 2 in contact with each other. The magnetic attraction force can stably maintain the contact between the two, so that the staff can loosen the top plate 23 and use both hands to add sulfuric acid more freely, thereby improving the convenience and efficiency of the operation.

[0043] As a preferred technical solution of the present invention, two symmetrically arranged positioning posts 25 are fixedly connected to the surface of the bottom plate 22 , and a positioning groove 26 corresponding to the position of the positioning posts 25 is formed on the bottom surface of the cover plate 2 .

[0044] Specifically, when the staff replaces the adsorption block 18, they first pull up the adsorption assembly through the top plate 23. At this time, the positioning column 25 will be inserted into the positioning groove 26. When the bottom plate 22 and the bottom surface of the cover plate 2 are adsorbed, the staff can twist the top plate 23 to separate the internal thread ring 20 from the external thread ring 19. Then the adsorption block 18 can be taken out, and then the new adsorption block 18 is placed in the adsorption tube 16, and the internal thread ring 20 and the external thread ring 19 are tightened again, and then the top plate 23 is gently pressed down to make the bottom plate 22 detach from the magnetic block 28, and the positioning column 25 is removed from the positioning groove 26, and the adsorption assembly can be restored to normal working state; the cooperation of the positioning column 25 and the positioning groove 26 can ensure that when the top plate 23 and the internal thread ring 20 are twisted, the bottom plate 22 and the external thread ring 19 will not rotate accordingly, thereby ensuring the stability and accuracy of the operation and facilitating the replacement of the adsorption block 18.

[0045] As a preferred technical solution of the present invention, two symmetrically arranged upper magnetic blocks 29 are fixedly connected inside the top plate 23 , and the upper magnetic blocks 29 correspond to the magnetic attraction blocks 28 in position.

[0046] Specifically, during normal use, the top plate 23 will fit with the surface of the cover plate 2, and the upper magnetic block 29 and the magnetic suction block 28 will be adsorbed together, thereby providing fixation for the entire adsorption assembly, helping to reduce the shaking of the adsorption assembly caused by vibration or improper operation, and ensuring the normal working state of the adsorption assembly.

[0047] As a preferred technical solution of the present invention, a handle 24 is fixedly connected to the surface of the top plate 23 .

[0048] Specifically, the setting of the handle 24 facilitates the staff's grip on the top plate 23, making the operations of pulling up, pushing back and rotating the top plate 23 easier and more labor-saving. The surface of the handle 24 is made of anti-slip material, which can further improve the safety of operation and prevent operational errors caused by hand slippage. Through the handle 24, the staff can more conveniently control the top plate 23, whether it is lifting or resetting the adsorption component, it can be completed more smoothly and accurately.

[0049] It is worth noting that the structures inside the above-mentioned sulfuric acid dripping equipment for the production of polyaluminum sulfate are all made of corrosion-resistant materials to ensure the long-term stable operation of the equipment in a strong acid environment, prevent the equipment from being damaged by corrosion, and improve the service life and reliability of the equipment.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfuric acid dripping device for producing polyaluminium sulfate, comprising a sulfuric acid tank (1) and a cover plate (2) connected to the sulfuric acid tank (1), characterized in that: A heat exchange jacket (3) is installed in the sulfuric acid tank (1). The bottom of the heat exchange jacket (3) is fixedly connected to a plurality of equidistantly arranged support legs (4). The bottom of the support legs (4) is detachably connected to the bottom surface of the inner wall of the sulfuric acid tank (1). A heat exchange groove (5) is provided in the heat exchange jacket (3). A liquid inlet pipe (6) connected to the heat exchange groove (5) is fixedly connected to one side of the top of the heat exchange jacket (3). A liquid outlet pipe (7) connected to the heat exchange groove (5) is fixedly connected to one side of the bottom of the heat exchange jacket (3). Both the liquid inlet pipe (6) and the liquid outlet pipe (7) penetrate the side wall of the sulfuric acid tank (1). A heater (8) is fixedly connected to the outer wall of the sulfuric acid tank (1). Both ends of the liquid inlet pipe (6) and the liquid outlet pipe (7) located outside the sulfuric acid tank (1) are fixedly connected to the heater (8). A cleaning component is connected to the top of the heat exchange jacket (3). A moisture absorption component is connected to the bottom surface of the cover plate (2).

2. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 1, characterized in that: The cleaning assembly comprises a fixing ring (9), a connecting ring (10), an injection head (12), a connecting pipe (14) and a liquid inlet head (15); the fixing ring (9) is fixedly connected to the top of the heat exchange sleeve (3); the connecting ring (10) is fixedly connected to the top of the fixing ring (9); a plurality of injection heads (12) are fixedly connected to the inside and outside of the connecting ring (10); a guide groove (11) is provided in the connecting ring (10); the injection head (12) is communicated with the guide groove (11); the fixing ring (9) is provided with a guide groove (11) connected to the guide groove (11); 1), a connecting groove (13) connected to the heat exchange groove (5), a connecting pipe (14) connected to the connecting groove (13) is fixedly connected to the top of the inner wall of the heat exchange groove (5), one end of the connecting pipe (14) passes through the side wall of the sulfuric acid tank (1) along the liquid inlet pipe (6) and penetrates the outer wall of the liquid inlet pipe (6) near the heater (8), the end of the connecting pipe (14) located outside the sulfuric acid tank (1) is fixedly connected to a liquid inlet head (15), a sealing plug (32) is detachably connected to the liquid inlet head (15), and a drain pipe (31) is fixedly connected to the bottom of the sulfuric acid tank (1).

3. A sulfuric acid adding device for producing polyaluminium sulfate according to claim 2, characterized in that: The moisture absorption component comprises an adsorption tube (16), an adsorption block (18), an external threaded ring (19) and an internal threaded ring (20); the bottom surface of the cover plate (2) is connected to the adsorption tube (16); the outer wall of the adsorption tube (16) is provided with a plurality of air guide holes (17); the top of the adsorption tube (16) is fixedly connected to the external threaded ring (19); the outer wall of the external threaded ring (19) is threadedly connected to the internal threaded ring (20); and the adsorption block (18) is located between the adsorption tube (16), the external threaded ring (19) and the internal threaded ring (20).

4. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 3, characterized in that: The surface of the cover plate (2) is provided with a sliding groove (21) corresponding to the position of the adsorption tube (16); the bottom of the adsorption tube (16) is fixedly connected to a bottom plate (22); the top of the internal threaded ring (20) is fixedly connected to a top plate (23); and the cross-sections of the bottom plate (22) and the top plate (23) are both larger than those of the adsorption tube (16).

5. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 4, characterized in that: Two symmetrically arranged lower magnetic blocks (30) are fixedly connected inside the bottom plate (22), and two symmetrically arranged mounting grooves (27) are provided inside the cover plate (2), and a magnetic attraction block (28) is fixedly connected inside each of the mounting grooves (27), and the magnetic attraction blocks (28) correspond in position to the lower magnetic blocks (30).

6. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 5, characterized in that: Two symmetrically arranged positioning posts (25) are fixedly connected to the surface of the bottom plate (22), and a positioning groove (26) corresponding to the position of the positioning posts (25) is formed on the bottom surface of the cover plate (2).

7. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 6, characterized in that: Two symmetrically arranged upper magnetic blocks (29) are fixedly connected inside the top plate (23), and the positions of the upper magnetic blocks (29) and the magnetic attraction blocks (28) correspond to each other.

8. A sulfuric acid dropping device for producing polyaluminium sulfate according to claim 7, characterized in that: A handle (24) is fixedly connected to the surface of the top plate (23).

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