CN111320195A - Aluminum sulfate synthesis system and method for synthesizing aluminum sulfate by using same - Google Patents
Aluminum sulfate synthesis system and method for synthesizing aluminum sulfate by using same Download PDFInfo
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- CN111320195A CN111320195A CN202010343901.6A CN202010343901A CN111320195A CN 111320195 A CN111320195 A CN 111320195A CN 202010343901 A CN202010343901 A CN 202010343901A CN 111320195 A CN111320195 A CN 111320195A
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- C01F7/68—Aluminium compounds containing sulfur
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Abstract
The invention discloses an aluminum sulfate synthesis system, which comprises a reaction kettle provided with a feed port and a discharge port, wherein the feed port of the reaction kettle is communicated with a water injection device, a concentrated sulfuric acid injection device and an aluminum hydroxide feeding device, and the reaction kettle, the water injection device, the concentrated sulfuric acid injection device and the aluminum hydroxide feeding device are all connected with the same PLC (programmable logic controller) and are used for automatically feeding and reacting according to user setting; a coil pipe is arranged in the reaction kettle, an inlet and an outlet of the coil pipe are both arranged on the outer wall of the reaction kettle, and the inlet is higher than the outlet; the inlet of the coil is communicated with a low-pressure steam injection device connected with the PLC, and the outlet of the coil is communicated with a water injection device; the reaction kettle is further provided with a temperature monitoring device connected with the PLC, and the temperature monitoring device is used for monitoring the real-time temperature in the reaction kettle. The invention relates to a synthesis system of aluminum sulfate, aiming at ensuring the safety of aluminum sulfate synthesis.
Description
Technical Field
The invention relates to the technical field of aluminum sulfate synthesis, in particular to an aluminum sulfate synthesis system and a method for synthesizing aluminum sulfate by using the same.
Background
Aluminum sulfate (chemical formula Al2(SO4)3), white orthorhombic crystalline powder. In the paper industry, the product can be used as a precipitator for sizing materials such as rosin size, wax emulsion and the like, a flocculating agent in water treatment, an internal retention agent of a foam fire extinguisher, a raw material for manufacturing alum and aluminum white, a raw material for petroleum decoloration, a deodorizing agent, a raw material for certain medicines and the like.
A large part of the application is to be used as a flocculating agent in the treatment of drinking water, industrial water and industrial wastewater, and the flocculating agent accounts for about 40 percent of the total yield of aluminum sulfate. When aluminum sulfate is added to such water, colloidal aluminum hydroxide flakes are formed which adsorb and precipitate bacteria, colloids and other suspended matter, and are used in drinking water treatment to control the color and taste of the water.
However, in the conventional process, most of the raw materials fed into the reaction kettle are fed manually, and particularly when acidic raw materials are already in the reaction kettle, the acidic and alkaline reaction is abnormally severe when the raw materials of aluminum hydroxide are fed, the reaction temperature is high, high-temperature tail gas rushes out of the reaction kettle, and if the acidic raw materials of aluminum hydroxide are fed, the high-temperature tail gas can cause physical harm to feeding personnel, so that improvement on the synthesis equipment of aluminum sulfate is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a system for synthesizing aluminum sulfate so as to ensure the safety of aluminum sulfate synthesis.
The above object of the present invention is achieved by the following technical solutions:
a synthetic system of aluminum sulfate comprises a reaction kettle provided with a feed port and a discharge port, wherein the feed port of the reaction kettle is communicated with a water injection device, a concentrated sulfuric acid injection device and an aluminum hydroxide feeding device, and the reaction kettle, the water injection device, the concentrated sulfuric acid injection device and the aluminum hydroxide feeding device are all connected with the same PLC and are used for automatic feeding and reaction according to user setting; a coil pipe is arranged in the reaction kettle, an inlet and an outlet of the coil pipe are both arranged on the outer wall of the reaction kettle, and the inlet is higher than the outlet; the inlet of the coil is communicated with a low-pressure steam injection device connected with the PLC, and the outlet of the coil is communicated with a water injection device; the reaction kettle is further provided with a temperature monitoring device connected with the PLC, and the temperature monitoring device is used for monitoring the real-time temperature in the reaction kettle.
By adopting the technical scheme, in the process of synthesizing the aluminum sulfate, an operator sets the proportion and the input sequence of each raw material through the PLC, and the PLC can automatically perform the process of configuring the aluminum sulfate according to the set program, so that the direct participation of personnel is reduced, the threats to the health and the safety of the operator are greatly reduced, and the safety of the synthesis of the aluminum sulfate is ensured; in the whole process, the PLC controller intelligently controls the water injection device, the concentrated sulfuric acid injection device and the aluminum hydroxide feeding device to feed materials to the reaction kettle according to the set feeding proportion and the set feeding sequence, and controls the reaction kettle to stir and accelerate the reaction; simultaneously the intercommunication that sets up at reation kettle has low pressure steam injection device's coil pipe, can monitor reaction environment temperature not reaching standard at temperature monitoring device, inject hot steam in order to improve reation kettle's reaction temperature into the coil pipe through PLC controller control low pressure steam injection device, and simultaneously, the comdenstion water that forms after the hot steam condensation behind the coil pipe flows back in the water injection device of intercommunication, the reuse of water resource has been obtained, whole operation process intelligent degree is high, the security is strong, and operating personnel has been reduced.
The invention is further configured to: the reaction kettle is also communicated with a tail gas absorption tower through a tail gas pipe.
Through adopting above-mentioned technical scheme, reation kettle can appear reacting gas in the synthetic reaction process of aluminum sulfate, if any volatilize in the workshop, can play adverse effect to staff's health, so set up the tail gas absorption tower with volatile substance such as the gas that produces in the reaction absorb in the tail gas absorption tower in order to carry out neutralization reaction to reduce or even get rid of the health hazard to the staff.
The invention is further configured to: the reaction kettle is also communicated with a washing water injection device, and the washing water injection device is connected with the PLC.
Through adopting above-mentioned technical scheme, once synthetic back that finishes when aluminum sulfate in the reation kettle, if not rinse in the reation kettle, remaining solution can lead to the fact the influence of different degrees to secondary product down, consequently sets up the washing water injection device with reation kettle intercommunication, once synthetic back that finishes at aluminum sulfate, injects the washing water (can the solution of neutralization aluminum sulfate) into reation kettle to thorough washing reation kettle inner wall.
The invention is further configured to: and a discharge hole of the reaction kettle is communicated with a wastewater treatment system.
Through adopting above-mentioned technical scheme to handle the waste water that finishes through the washing water in the reation kettle, avoid the pollution to near water resource.
The invention is further configured to: the discharge port of the reaction kettle is communicated with a product tank, and a precipitation filter tank is also arranged between the reaction kettle and the product tank.
By adopting the technical scheme, after the aluminum sulfate is synthesized once in the reaction kettle, finished aluminum sulfate is loaded into the product tank after passing through the precipitation filter tank, so that the finished aluminum sulfate is purer and free of impurities.
The invention is further configured to: the aluminium hydroxide feeding device includes the aluminium hydroxide feed bin, connects in the screw conveyer and the temporary storage case of aluminium hydroxide feed bin export, the temporary storage case sets up between screw conveyer and reation kettle, and communicates in reation kettle through being provided with the solenoid valve, screw conveyer and solenoid valve all connect in the PLC controller.
By adopting the technical scheme, the acid-base reaction is very violent, and the generated temperature is extremely high, so that the reaction temperature must be fully controlled when aluminum hydroxide raw materials are put into the reactor, all the aluminum hydroxide with the weight cannot be put into the reactor at one time, therefore, the screw conveyor is controlled by the PLC controller to be divided into a plurality of times according to the proportion and conveyed into the temporary storage box, then the aluminum hydroxide in the temporary storage box is slowly put into the reaction kettle to react by opening the electromagnetic valve, so that the reaction temperature can be controlled more accurately, the reaction temperature is prevented from being overhigh, the electromagnetic valve can be closed in time to stop the putting in of the aluminum hydroxide when the reaction temperature is overhigh, and the reliability is high.
The invention is further configured to: the reaction kettle is provided with a liquid level monitoring device connected with the PLC, and the liquid level monitoring device is used for inputting signals to the PLC to calculate the solution component added into the reaction kettle.
By adopting the technical scheme, the weight of the added raw materials is further verified, and errors in the input weight of the raw materials are avoided.
Another objective of the present invention is to provide a method for synthesizing aluminum sulfate, so as to further ensure the safety of aluminum sulfate synthesis.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for synthesizing aluminum sulfate, comprising the steps of:
(1) adding 15-20 parts of water;
(2) adding concentrated sulfuric acid until the acidity reaches 40-45%, and standing for 8-10 hr to release heat and control temperature;
(3) adding aluminum hydroxide in batches to ensure that the reaction temperature is less than 120 ℃;
(4) water is supplemented to 40 parts;
(5) the pH was assayed and checked.
By adopting the technical scheme, on one hand, the aluminum hydroxide is added in batches, so that the phenomenon that the reaction is too violent and the excessive temperature is generated, and other potential safety hazards such as explosion and cracking of the reaction kettle and the like can be avoided; on the other hand, the 4 th step is used for secondary water supplement, and is not directly added in the 1 st step, because the acidity is reduced due to the fact that the water is added in a complete manner, and the reaction is slow due to the low acidity, so that the production efficiency is influenced.
The invention is further configured to: the temperature is controlled to be 70-80 ℃ before the aluminum hydroxide is added.
By adopting the technical scheme, the subsequent reaction can be carried out more quickly within a safe range.
The invention is further configured to: the concentration of the concentrated sulfuric acid is 98-99%, the concentrated sulfuric acid is pure concentrated sulfuric acid, and the aluminum hydroxide is pure aluminum hydroxide.
By adopting the technical scheme, the finished product of aluminum sulfate can be purer.
In conclusion, the beneficial technical effects of the invention are as follows:
the PLC controller can automatically perform the aluminum sulfate configuration process according to a set program, so that direct participation of personnel is reduced, the threats to the health and safety of operators are greatly reduced, and the safety of aluminum sulfate synthesis is ensured;
2. the screw conveyor is controlled by the PLC to be divided into a plurality of times according to the proportion and conveyed into the temporary storage box, and then the aluminum hydroxide in the temporary storage box is slowly put into the reaction kettle to react by opening the electromagnetic valve, so that the reaction temperature can be more accurately controlled, and the overhigh reaction temperature is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a system block diagram of the present invention.
In the figure, 1, a reaction kettle; 2. a water injection device; 3. a concentrated sulfuric acid injection device; 4. an aluminum hydroxide feeding device; 41. an aluminum hydroxide bin; 42. a screw conveyor; 43. a temporary storage box; 44. an electromagnetic valve; 5. a PLC controller; 6. a coil pipe; 7. a low pressure steam injection device; 8. a temperature monitoring device; 9. a tail gas pipe; 10. a tail gas absorption tower; 11. a washing water injection device; 12. a product tank; 13. a sedimentation and filtration tank; 14. a liquid level monitoring device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Referring to fig. 1 and 2, the aluminum sulfate synthesis system disclosed by the invention comprises a reaction kettle 1 provided with a feed inlet and a discharge outlet, wherein the feed inlet of the reaction kettle 1 is communicated with a water injection device 2, a concentrated sulfuric acid injection device 3 and an aluminum hydroxide feeding device 4, and the reaction kettle 1, the water injection device 2, the concentrated sulfuric acid injection device 3 and the aluminum hydroxide feeding device 4 are all connected with a same PLC controller 5 for automatic feeding and reaction according to user setting; a coil 6 is arranged in the reaction kettle 1, an inlet and an outlet of the coil 6 are both arranged on the outer wall of the reaction kettle 1, and the inlet is higher than the outlet; the inlet of the coil 6 is communicated with a low-pressure steam injection device 7 connected with the PLC 5, and the outlet of the coil 6 is communicated with the water injection device 2; the reaction kettle 1 is also provided with a temperature monitoring device 8 connected with the PLC controller 5 and used for monitoring the real-time temperature in the reaction kettle 1.
In the process of synthesizing the aluminum sulfate, an operator sets the proportion and the input sequence of each raw material through the PLC 5, and the PLC 5 automatically performs the process of configuring the aluminum sulfate according to the set program, so that the direct participation of the operator is reduced, the threats to the health and the safety of the operator are greatly reduced, and the safety of synthesizing the aluminum sulfate is ensured; in the whole process, the PLC 5 intelligently controls the water injection device 2, the concentrated sulfuric acid injection device 3 and the aluminum hydroxide feeding device 4 to feed materials to the reaction kettle 1 according to the set feeding proportion and the set feeding sequence, and controls the reaction kettle 1 to stir and accelerate the reaction; simultaneously the intercommunication that sets up at reation kettle 1 has coil pipe 6 of low pressure steam injection device 7, can monitor reaction environment temperature not reaching standard at temperature monitoring device 8, inject into hot steam in order to improve reation kettle 1 in to coil pipe 6 through PLC controller 5 control low pressure steam injection device 7, and simultaneously, the comdenstion water that forms after the hot steam condensation behind coil pipe 6 flows back in the water injection device 2 of intercommunication, the reuse of water resource has been obtained, the intelligent degree of whole operation process is high, the security is strong, and operating personnel has been reduced
The reaction kettle 1 is also communicated with a tail gas absorption tower 10 through a tail gas pipe 9. Reaction gas can appear in reation kettle 1 in the synthetic reaction of aluminum sulfate, if any volatilize in the workshop, can play adverse effect to staff's health, so set up tail gas absorption tower 10 and absorb volatile substance such as the gas that produces in the reaction in tail gas absorption tower 10 in order to carry out neutralization reaction to reduce or even get rid of the health hazard to the staff.
The reaction kettle 1 is also communicated with a washing water injection device 11, and the washing water injection device 11 is connected with the PLC 5. After the synthesis of aluminium sulfate once finishes in reation kettle 1, if not wash in reation kettle 1, remaining solution can cause the influence of different degree to next secondary product, consequently sets up the washing water injection device 11 with reation kettle 1 intercommunication, finishes at the synthesis of aluminium sulfate once, pours into the washing water (can neutralize the solution of aluminium sulfate) into reation kettle 1 to thorough washing reation kettle 1 inner wall.
The discharge hole of the reaction kettle 1 is communicated with a wastewater treatment system; the wastewater treatment system is a wastewater treatment tank 15 communicated with a discharge hole of the reaction kettle 1 through a pipeline. So as to carry out chemical treatment such as neutralization on the waste water after the washing water in the reaction kettle 1 is completely washed, and avoid the pollution to nearby water resources.
A discharge port of the reaction kettle 1 is communicated with a product tank 12, and a precipitation filtering tank 13 is also arranged between the reaction kettle 1 and the product tank 12. After the aluminum sulfate is synthesized in the reaction kettle 1 once, finished aluminum sulfate is loaded into the product tank 12 after passing through the precipitation filter tank 13, so that the finished aluminum sulfate is purer and free of impurities.
Wherein, aluminium hydroxide feeding device 4 includes aluminium hydroxide feed bin 41, connects in screw conveyer 42 and the case 43 of keeping in of aluminium hydroxide feed bin 41 export, and the case 43 of keeping in sets up between screw conveyer 42 and reation kettle 1, and communicates in reation kettle 1 through being provided with solenoid valve 44, and screw conveyer 42 and solenoid valve 44 all connect in PLC controller 5. The acid-base reaction is very violent, and the generated temperature is extremely high, so the reaction temperature must be fully controlled when the aluminum hydroxide raw material is put into the reactor, and the whole amount of aluminum hydroxide cannot be put into the reactor at one time, therefore, the PLC 5 controls the screw conveyer 42 to proportionally convey the aluminum hydroxide into the temporary storage box 43 for multiple times, and then the electromagnetic valve 44 is opened to slowly put the aluminum hydroxide in the temporary storage box 43 into the reactor 1 for reaction, so that the reaction temperature can be controlled more accurately, the reaction temperature is prevented from being too high, and when the reaction temperature is too high, the electromagnetic valve 44 can be closed in time to stop the putting of the aluminum hydroxide, and the reliability is high.
The reaction kettle 1 is provided with a liquid level monitoring device 14 connected with the PLC 5 and used for inputting signals to the PLC 5 so as to calculate the component of the solution added into the reaction kettle 1; the method is used for further verifying the added raw material component, and avoids errors of the raw material input component.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Example two
Referring to fig. 2, the method for synthesizing aluminum sulfate by using the aluminum sulfate synthesis system of the first embodiment of the present invention includes the following steps:
(1) adding 15-20 parts of water;
(2) adding concentrated sulfuric acid until the acidity reaches 40-45%, and standing for 8-10 hr to release heat and control temperature;
(3) adding aluminum hydroxide in batches to ensure that the reaction temperature is less than 120 ℃;
(4) water is supplemented to 40 parts;
(5) the pH was assayed and checked.
On one hand, the aluminum hydroxide is added in batches, so that the phenomenon that the reaction is too violent and the excessive temperature is generated, and other potential safety hazards such as explosion of the reaction kettle 1 and the like can be avoided; on the other hand, the 4 th step is used for secondary water supplement, and is not directly added in the 1 st step, because the acidity is reduced due to the fact that the water is added in a complete manner, and the reaction is slow due to the low acidity, so that the production efficiency is influenced.
Before the aluminum hydroxide is put into the furnace, the temperature is controlled to be 70-80 ℃; so that subsequent reactions can proceed more quickly within safe limits.
The concentration of the concentrated sulfuric acid is 98-99%, the concentrated sulfuric acid is pure concentrated sulfuric acid, and the aluminum hydroxide is pure aluminum hydroxide; so that the finished product of aluminum sulfate can be purer.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a synthesis system of aluminum sulfate, is including offering reation kettle (1) of dog-house and discharge gate, its characterized in that: the feeding port of the reaction kettle (1) is communicated with a water injection device (2), a concentrated sulfuric acid injection device (3) and an aluminum hydroxide feeding device (4), and the reaction kettle (1), the water injection device (2), the concentrated sulfuric acid injection device (3) and the aluminum hydroxide feeding device (4) are all connected with the same PLC (programmable logic controller) controller (5) and are used for carrying out automatic feeding and reaction according to user setting; a coil pipe (6) is arranged in the reaction kettle (1), an inlet and an outlet of the coil pipe (6) are both arranged on the outer wall of the reaction kettle (1), and the inlet is higher than the outlet; the inlet of the coil pipe (6) is communicated with a low-pressure steam injection device (7) connected with the PLC (5), and the outlet of the coil pipe (6) is communicated with the water injection device (2); the reaction kettle (1) is further provided with a temperature monitoring device (8) connected with the PLC (5) and used for monitoring the real-time temperature in the reaction kettle (1).
2. The system for synthesizing aluminum sulfate according to claim 1, wherein: the reaction kettle (1) is also communicated with a tail gas absorption tower (10) through a tail gas pipe (9).
3. The system for synthesizing aluminum sulfate according to claim 2, wherein: the reaction kettle (1) is also communicated with a washing water injection device (11), and the washing water injection device (11) is connected with the PLC (5).
4. The system for synthesizing aluminum sulfate according to claim 3, wherein: the discharge hole of the reaction kettle (1) is communicated with a wastewater treatment system.
5. The system for synthesizing aluminum sulfate according to claim 1, wherein: the discharge port of the reaction kettle (1) is communicated with a product tank (12), and a precipitation filter tank (13) is also arranged between the reaction kettle (1) and the product tank (12).
6. The system for synthesizing aluminum sulfate according to claim 1, wherein: aluminium hydroxide feeding device (4) include aluminium hydroxide feed bin (41), connect in screw conveyer (42) and temporary storage case (43) of aluminium hydroxide feed bin (41) export, temporary storage case (43) set up between screw conveyer (42) and reation kettle (1), and communicate in reation kettle (1) through being provided with solenoid valve (44), screw conveyer (42) and solenoid valve (44) all connect in PLC controller (5).
7. The system for synthesizing aluminum sulfate according to claim 1, wherein: the reaction kettle (1) is provided with a liquid level monitoring device (14) connected with the PLC (5) and used for inputting signals to the PLC (5) so as to calculate the solution component added into the reaction kettle (1).
8. A method for synthesizing aluminum sulfate by using the aluminum sulfate synthesis system as set forth in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) adding 15-20 parts of water;
(2) adding concentrated sulfuric acid until the acidity reaches 40-45%, and standing for 8-10 hr to release heat and control temperature;
(3) adding aluminum hydroxide in batches to ensure that the reaction temperature is less than 120 ℃;
(4) water is supplemented to 40 parts;
(5) the pH was assayed and checked.
9. The method for synthesizing aluminum sulfate according to claim 8, wherein: the temperature is controlled to be 70-80 ℃ before the aluminum hydroxide is added.
10. The method for synthesizing aluminum sulfate according to claim 9, wherein: the concentration of the concentrated sulfuric acid is 98-99%, the concentrated sulfuric acid is pure concentrated sulfuric acid, and the aluminum hydroxide is pure aluminum hydroxide.
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| CN202010343901.6A CN111320195A (en) | 2020-04-27 | 2020-04-27 | Aluminum sulfate synthesis system and method for synthesizing aluminum sulfate by using same |
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| CN114345268A (en) * | 2021-12-14 | 2022-04-15 | 昆明云天墨睿科技有限公司 | Industrial-grade mass production automatic production system and production method of graphene oxide |
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Application publication date: 20200623 |
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