System for reaction of ammonium bicarbonate and acidic solution
By designing a reaction system between ammonium bicarbonate and acidic solution, and using spray and overflow adjustment devices to monitor and adjust the neutralization process, the liquid overflow tank problem during the neutralization reaction between ammonium bicarbonate and acidic solution is solved, and a safe and automated neutralization process is achieved.
Patent Information
- Application Number
- CN202421631747.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-10
AI Technical Summary
When neutralizing ammonium bicarbonate and acidic solution, liquid overflow and tanks are prone to occur, which poses safety risks and is difficult to clean.
A reaction system of ammonium bicarbonate and acidic solution is designed, including a first-stage neutralization reaction tank, a spray device and an overflow regulation device. The spraying device controls the spray head to spray the foam surface through a liquid level monitoring meter, and the overflow adjustment device controls the return pump to return the overflow slurry to the reaction tank through an overflow monitoring meter, and conducts a joint monitoring and regulating the neutralization process.
Effectively alleviate the phenomenon of liquid overflow, prevent the occurrence of tank explosion, reduce safety risks and cleaning difficulties, realize automated neutralization processes, and avoid manual intervention.
Smart Images
Figure CN222805179U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of chemical industry equipment, and in particular to a system for reacting ammonium bicarbonate with an acidic solution. Background Art
[0002] Ammonium bicarbonate is a common agricultural fertilizer. It is prepared industrially by reacting NH3 produced by the synthetic ammonia process with the combustion product carbon dioxide. It is a white, water-soluble crystal with a slight ammonia odor. The converted ammonium content is 22.8%. Its unit ammonium procurement cost is 40% lower than that of ammonia water. Compared with ammonia water, it is more convenient to transport and store, and can be directly stored as a solid. The process of its dissolution in water is a strongly endothermic process, and the ammonia odor is significantly reduced when the solution is acidic.
[0003] When using ammonium bicarbonate to neutralize acidic solutions, the reaction rate is faster than that of using liquid alkali or ammonia water, and the storage requirements and procurement costs of ammonium bicarbonate are significantly lower than those of liquid alkali and ammonia water. Moreover, compared with liquid alkali, the filtrate after neutralization with ammonium bicarbonate can be used as a raw material for recovering ammonium chloride, and the sales value of by-product ammonium chloride in the market is much higher than that of sodium chloride. Therefore, many chemical production companies, especially hazardous waste companies, have begun to adjust the alkaline agents used for neutralization in production, such as liquid alkali, ammonia water, and soda ash, to ammonium bicarbonate.
[0004] When the alkaline neutralizing agent is replaced with ammonium bicarbonate, the storage and purchase costs are significantly reduced. However, in actual use, a large amount of carbon dioxide will overflow from the liquid phase during the neutralization process. When a solid phase precipitates in the acid solution, it is very easy for the liquid level to rise rapidly, resulting in the phenomenon of flooding in the tank. The tank has potential safety risks, and the neutralization reaction of ammonium bicarbonate and acidic solution affects the on-site environmental sanitation and is difficult to clean. The existing technology cannot solve the above technical problems. Utility Model Content
[0005] Therefore, in order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a reaction system of ammonium bicarbonate and acidic solution to solve the problem of sudden bubbling caused by liquid flooding during the neutralization reaction of ammonium bicarbonate and acidic solution.
[0006] In order to achieve the above object, the utility model provides the following technical solution: a reaction system of ammonium bicarbonate and acidic solution, characterized in that it comprises:
[0007] A primary neutralization reaction tank, used for neutralization reaction of ammonium bicarbonate and acidic solution;
[0008] A spray device, comprising a liquid level monitor, a spray feed port, a spray pipeline, and a spray head, wherein the liquid level monitor is arranged at the notch edge of the primary neutralization reaction tank, the spray feed port is arranged at the lower half of the primary neutralization reaction tank, and the spray pipeline connects the spray feed port to the spray head arranged at the top of the primary neutralization reaction tank;
[0009] The overflow regulating device includes an overflow funnel, an overflow monitoring meter, a secondary overflow regulating tank, and a reflux pump. The overflow funnel is arranged in the upper half of the primary neutralization reaction tank. The overflow monitoring meter is arranged at the tail end of the overflow funnel and is then connected to the secondary overflow regulating tank. A reflux pump is arranged behind the secondary overflow regulating tank and is connected to the primary neutralization reaction tank.
[0010] The overflow regulating device is used to collect overflowed liquid and return liquid; the overflow monitoring meter in the overflow regulating device controls the start and stop of the spraying device;
[0011] The spray device is used to slow down the flooding phenomenon in the primary neutralization reaction tank;
[0012] Specifically, the system further comprises an ammonium bicarbonate dissolving device, and the ammonium bicarbonate dissolving device is provided with an overflow port connected to the primary neutralization reaction tank.
[0013] Specifically, the overflow port is arranged at 75-85% of the upper part of the ammonium bicarbonate dissolving device.
[0014] Specifically, the ammonium bicarbonate dissolving device is provided with a solvent water introduction feed port, and the solvent water is fed into the lower part of the tank.
[0015] Specifically, the ammonium bicarbonate dissolving device is equipped with a density meter, and the density meter is installed 10 to 30 cm below the overflow port of the ammonium bicarbonate dissolving device.
[0016] Specifically, the overflow funnel is arranged 10 to 20 cm away from the edge of the primary neutralization reaction tank.
[0017] Specifically, a pH monitor is also provided in the primary neutralization reaction tank, and the pH monitor is provided at the bottom of the primary neutralization reaction tank.
[0018] Compared with the prior art, the advantages of the present application are: a spray device is provided to spray and eliminate the rising foam surface, an overflow regulating device is provided, when the liquid level rises to the overflow funnel, the overflow monitoring meter responds to the signal to start the spray device, and the overflow enters the secondary overflow regulating tank, when the overflow stops, the reflux pump draws the solution from the secondary overflow regulating tank back to the primary neutralization reaction tank to continue the action, the spray device, the overflow regulating device and the ammonium bicarbonate dissolving device are linked, the liquid flooding in the neutralization tank is monitored in real time, and the liquid flooding phenomenon is slowed down in time to prevent the occurrence of the bubbling phenomenon, which can effectively avoid the safety risks caused by the bubbling during the neutralization reaction of ammonium bicarbonate and the acidic solution, avoid the inconvenience of manually cleaning the bubbling tank, effectively reduce the labor intensity and the recovery safety risk, and can automatically adjust the ammonium bicarbonate feed amount or the acidic solution feed amount, so as to achieve acid-base neutralization without human intervention, without the occurrence of the bubbling phenomenon and without the need to add defoaming agents and other agents, which is cheap, fast and safe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a reaction system of ammonium bicarbonate and acidic solution as described in the embodiments of the present application;
[0021] In the figure: 1. Ammonium bicarbonate dissolving device; 1-1. Solvent water introduction feed port; 1-2. Overflow port; 1-3. Density meter; 2. Primary neutralization reaction tank; 2-1. Spray feed port; 2-2. Reflux pump; 2-3. Spray head; 2-4. Liquid level monitoring meter; 2-5. Overflow funnel; 2-6. Overflow monitoring meter; 2-7. Underflow pump; 3. Secondary overflow regulating tank; 3-1. Reflux pump. DETAILED DESCRIPTION
[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0023] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.
[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0026] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.
[0027] The embodiment of the present application provides a reaction system of ammonium bicarbonate and an acidic solution.
[0028] It includes: a primary neutralization reaction tank, used for neutralization reaction of ammonium bicarbonate and acidic solution;
[0029] A spray device, comprising a liquid level monitor, a spray feed port, a spray pipeline, and a spray head, wherein the liquid level monitor is arranged at the notch edge of the primary neutralization reaction tank, the spray feed port is arranged at the lower half of the primary neutralization reaction tank, and the spray pipeline connects the spray feed port to the spray head arranged at the top of the primary neutralization reaction tank;
[0030] The overflow regulating device includes an overflow funnel, an overflow monitoring meter, a secondary overflow regulating tank, and a reflux pump. The overflow funnel is arranged in the upper half of the primary neutralization reaction tank. The overflow monitoring meter is arranged at the tail end of the overflow funnel and is then connected to the secondary overflow regulating tank. A reflux pump is arranged behind the secondary overflow regulating tank and is connected to the primary neutralization reaction tank.
[0031] The overflow regulating device is used to collect overflowed liquid and return liquid; the overflow monitoring meter in the overflow regulating device controls the start and stop of the spraying device;
[0032] The spray device is used to slow down the flooding phenomenon in the primary neutralization reaction tank;
[0033] Specifically, the system further comprises an ammonium bicarbonate dissolving device, and the ammonium bicarbonate dissolving device is provided with an overflow port connected to the primary neutralization reaction tank.
[0034] Specifically, the overflow port is arranged at 75-85% of the upper part of the ammonium bicarbonate dissolving device.
[0035] Specifically, the ammonium bicarbonate dissolving device is provided with a solvent water introduction feed port, and the solvent water is fed into the lower part of the tank.
[0036] Specifically, the ammonium bicarbonate dissolving device is equipped with a density meter, and the density meter is installed 10 to 30 cm below the overflow port of the ammonium bicarbonate dissolving device.
[0037] Specifically, the overflow funnel is arranged 10 to 20 cm away from the edge of the primary neutralization reaction tank.
[0038] Specifically, a pH monitor is also provided in the primary neutralization reaction tank, and the pH monitor is provided at the bottom of the primary neutralization reaction tank.
[0039] Example 1
[0040] The reaction system of ammonium bicarbonate and acid solution comprises: an ammonium bicarbonate dissolving device, a primary neutralization reaction tank, a spraying device and an overflow regulating device.
[0041] The ammonium bicarbonate dissolving device includes a stirring rod and the dissolving tank is heated and thermostatic. The ammonium bicarbonate solvent device is provided with a solvent water introduction feed port. The solvent water enters from the upper feed port end, flows along the inner wall to the bottom of the tank, and is fed from the lower part of the tank. Ammonium bicarbonate is added to the ammonium bicarbonate dissolving device for dissolution. The overflow port is arranged at 75-85% above the dissolving tank. The solute ammonium bicarbonate is metered and added to the top of the ammonium bicarbonate dissolving device, and the solvent water is added from the lower part of the tank to dissolve and form an ammonium bicarbonate solution. A density meter is arranged in the dissolving tank, and the density meter is arranged and installed 15 cm below the overflow port of the ammonium bicarbonate dissolving device. The density meter can manage the amount of new ammonium bicarbonate added by the density of the dissolved liquid. The discharge temperature of the ammonium bicarbonate solution is 40-70°C.
[0042] A stirring rod, a liquid level monitor and a pH monitor are provided on the primary neutralization reaction tank. The ammonium bicarbonate solution is discharged into the primary neutralization reaction tank, and an acidic solution is added to the top of the primary neutralization reaction tank. At the same time, the stirring rod is used for stirring. The ammonium bicarbonate solution and the acidic solution undergo a neutralization reaction, and a large amount of carbon dioxide overflows from the reaction liquid. There are solid suspended substances in the reaction liquid, which causes flooding and the foam surface rises rapidly.
[0043] The overflow regulating device comprises an overflow funnel, an overflow monitoring meter, a secondary overflow regulating tank and a reflux pump; the neutralization reaction in the primary neutralization reaction tank causes the foam surface to rise rapidly, and the foam surface quickly reaches the liquid level of the overflow funnel. At this time, the overflow monitoring meter responds, opens the spraying device to spray and reduce the foam surface, and the overflowing liquid enters the secondary overflow regulating tank. When the overflow monitoring meter does not respond, that is, there is no overflow in the primary neutralization reaction tank, the secondary overflow regulating tank returns the overflow slurry to the primary neutralization reaction tank through the reflux pump.
[0044] The spray device includes a liquid level monitor, a spray device feed port, a spray pipeline, a reflux pump, and a spray head; the overflow monitor in the overflow regulating device detects overflow, the liquid level monitor monitors the liquid level, the spray device responds, the liquid in the primary neutralization reaction tank enters the spray pipeline through the spray feed port, the reflux pump draws the liquid to the spray head, and sprays the foam surface in the primary neutralization reaction tank, wherein the spray pressure of the spray system is 1.5-2.5MPa, the spray pressure is achieved by a pressure valve arranged after the reflux pump, and the foam surface drops.
[0045] The above steps are repeated several times until the pH value of the neutralization solution in the primary neutralization reaction tank is 7, and the underflow pump of the primary neutralization reaction tank is turned on to send the neutralization solution to the next process.
[0046] Example 2
[0047] When the ammonium bicarbonate neutralizes the acidic solution, about 40% of the volume of ammonium bicarbonate solid is added into the ammonium bicarbonate dissolving tank 1, water is added through the solvent water introduction type feed port 1-1, and the ammonium bicarbonate dissolving tank 1 is opened to heat up, and the ammonium bicarbonate solid is dissolved. With the continuous introduction of water, the liquid level in the ammonium bicarbonate dissolving tank 1 rises continuously, and when the liquid level rises to the liquid level of the upper overflow port 1-2 of the ammonium bicarbonate solution, the water intake is stopped. At this time, the temperature in the ammonium bicarbonate dissolving tank 1 drops sharply and then rises slowly, until the temperature of the solution in the ammonium bicarbonate dissolving tank 1 is 60° C., and then the water intake is continued slowly, and the density of the solution in the ammonium bicarbonate dissolving tank 1 is maintained to be ≥1.05g / m3 by continuously adding ammonium bicarbonate and water; at the same time, the ammonium bicarbonate solution flows out from the upper overflow port 1-2 of the ammonium bicarbonate solution and enters the primary neutralization reaction tank 2.
[0048] The amount of ammonium bicarbonate solution in the primary neutralization reaction tank 2 is continuously increased. After the amount of ammonium bicarbonate solution in the primary neutralization reaction tank 2 reaches 10% of the volume of the primary neutralization reaction tank 2, the acidic solution to be neutralized is slowly injected into the primary neutralization reaction tank 2. The acidic solution and the ammonium bicarbonate solution undergo a neutralization reaction to release a large amount of gas, and the liquid surface is in a boiling state. During this time, the liquid level is monitored by a liquid level monitor 2-4 provided on the primary neutralization reaction tank 2, and the ammonium bicarbonate solution and the acidic solution to be neutralized are continuously added until the liquid level monitor 2-4 monitors that the liquid level reaches 50% of the volume of the primary neutralization reaction tank 2, then the addition of the ammonium bicarbonate solution is stopped, and the acidic solution to be neutralized is continuously added until the pH value of the slurry in the neutralization tank is approximately 7, thereby completing the neutralization process.
[0049] During the neutralization process, when the liquid level rises rapidly and the liquid overflow occurs, the overflow monitoring meter 2-6 detects flow and stops adding the ammonium bicarbonate solution and the acid solution, and starts the reflux pump 2-2 to suppress the foam layer by spraying to prevent the primary neutralization reaction tank 1 from bubbling.
[0050] After spraying, the foam surface drops and the overflow monitoring meter 2-6 no longer detects flow, the spraying stops, and the secondary overflow regulating tank 3 returns the overflow slurry to the primary neutralization reaction tank 2 through its attached reflux pump 3-1.
[0051] After continuously repeating various actions according to different situations, when the pH and liquid level of the neutralization solution of the ammonium bicarbonate solution in the primary reaction neutralization reaction tank 2 and the acid solution to be neutralized both meet the standards, the slurry is sent to the next process through the underflow pump 2-7.
[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A system for reacting ammonium bicarbonate with an acidic solution, characterized in that: include: A primary neutralization reaction tank, used for neutralization reaction of ammonium bicarbonate and acidic solution; A spray device, comprising a liquid level monitor, a spray feed port, a spray pipeline, and a spray head, wherein the liquid level monitor is arranged at the notch edge of the primary neutralization reaction tank, the spray feed port is arranged at the lower half of the primary neutralization reaction tank, and the spray pipeline connects the spray feed port to the spray head arranged at the top of the primary neutralization reaction tank; The overflow regulating device comprises an overflow funnel, an overflow monitoring meter, a secondary overflow regulating tank, and a reflux pump. The overflow funnel is arranged at the upper half of the primary neutralization reaction tank. The overflow monitoring meter is arranged at the tail end of the overflow funnel and then connected to the secondary overflow regulating tank. A reflux pump is arranged after the secondary overflow regulating tank and connected to the primary neutralization reaction tank. The overflow regulating device is used to collect overflowed liquid and return liquid; the overflow monitoring meter in the overflow regulating device controls the start and stop of the spraying device; The spray device is used to slow down the flooding phenomenon in the primary neutralization reaction tank.
2. The system according to claim 1, characterized in that The system also includes an ammonium bicarbonate dissolving device, and the ammonium bicarbonate dissolving device is provided with an overflow port connected to the primary neutralization reaction tank.
3. The system according to claim 2, characterized in that The overflow port is arranged at 75-85% of the upper part of the ammonium bicarbonate dissolving device.
4. The system according to claim 2, characterized in that The ammonium bicarbonate dissolving device is provided with a solvent water introduction feed port, and the solvent water is fed into the lower part of the tank.
5. The system according to claim 2, characterized in that The ammonium bicarbonate dissolving device is equipped with a density meter, and the density meter is installed 10 to 30 cm below the overflow port of the ammonium bicarbonate dissolving device.
6. The system according to claim 1, characterized in that The overflow funnel is arranged at a distance of 10 to 20 cm from the edge of the primary neutralization reaction tank.
7. The system according to claim 1, characterized in that A pH monitor is also provided in the primary neutralization reaction tank, and the pH monitor is provided at the bottom of the primary neutralization reaction tank.