Pure carbon dioxide carbonization stripping agent device in rare earth smelting industry

Abstract

The utility model discloses a pure carbon dioxide carbonization stripping agent device in the rare earth smelting industry, which comprises a carbonization tower, a carbon dioxide storage tank and an absorption water tank, the output end of the carbon dioxide storage tank is connected with the input end of the carbonization tower through a carbonization assembly, and the input end of the carbonization assembly is provided with a dilution assembly for diluting ammonia water. Through the arrangement of the carbonization assembly, the purity of liquefied carbon dioxide in the carbon dioxide storage tank is 99.5%, the liquefied carbon dioxide is more easily absorbed by ammonia water, and the liquid carbon dioxide is gasified, so that the absorption thrust in the carbonization tower is maintained, and meanwhile, due to the buffer action of the carbon dioxide buffer tank, the carbon dioxide can be more easily absorbed by ammonia water. The supply pressure and flow of carbon dioxide can be stabilized, reaction fluctuation caused by unstable supply of carbon dioxide is avoided, and the reaction stability and the product quality can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pure carbon dioxide carbonization back-extraction agent device in the rare earth smelting industry, specifically a pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry. Background Technology

[0002] Ammonium bicarbonate, a common chemical substance, plays an important role in various fields such as agriculture, food, industry, and medicine. For example, in agriculture, ammonium bicarbonate is a fast-acting nitrogen fertilizer with a nitrogen content of about 17%. It provides nitrogen to crops, promotes the growth of plant stems and leaves, makes leaves greener and thicker, improves photosynthetic efficiency, and increases crop yield. In the early stages of growth of grain crops such as wheat and rice, topdressing with ammonium bicarbonate can promote rapid seedling growth.

[0003] Most existing ammonium bicarbonate is produced using the shift gas carbonization process. However, the carbon dioxide concentration in the shift gas is low, and the partial pressure of carbon dioxide is also low. In order to maintain the carbon dioxide absorption thrust in the carbonization tower, the carbonization tower needs a high operating pressure, resulting in huge energy consumption. Utility Model Content

[0004] The purpose of this invention is to provide a pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry, in order to solve the problems mentioned in the background art, such as the low concentration of carbon dioxide in the gas and the low partial pressure of carbon dioxide, which require a high operating pressure in order to maintain the absorption thrust of carbon dioxide in the carbonization tower, resulting in huge energy consumption and requiring a higher level of operator skill.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry includes a carbonization tower, a carbon dioxide storage tank, and an absorption water tank. The output end of the carbon dioxide storage tank is connected to the input end of the carbonization tower via a carbonization component. The input end of the carbonization component is equipped with a dilution component for diluting ammonia water. The exhaust end of the carbonization tower is connected to a carbonization tail gas discharge pipe, and the other end of the carbonization tail gas discharge pipe is connected to the absorption water tank. The input end of the absorption water tank is connected to a water injection pipe, and the output end of the absorption water tank is connected to a pumping component for pumping water that absorbs the carbonization tail gas to the dilution component. The bottom of the carbonization tower is equipped with a conveying component for pumping the reacted carbonized liquid to the outside.

[0007] Preferably, the carbonization component includes a carbon dioxide vaporizer connected to the output end of a carbon dioxide storage tank, the output end of the carbon dioxide vaporizer connected to a carbon dioxide buffer tank, the output end of the carbon dioxide buffer tank connected to a carbonization mixer, and the output end of the carbonization mixer connected to the input end of the carbonization tower.

[0008] Preferably, the dilution assembly includes an online ammonia diluent connected to the input end of the carbonization mixer, the input end of the online ammonia diluent being connected to an ammonia delivery pump, and the input end of the ammonia delivery pump being connected to an ammonia input pipe.

[0009] Preferably, the pumping assembly includes a water pump connected to the output end of the absorption tank, and the output end of the water pump is connected to an online ammonia diluent.

[0010] Preferably, the conveying assembly includes a carbonized liquid discharge pump connected to the output end of the carbonization tower, the output end of the carbonized liquid discharge pump connected to a carbon dioxide gasifier, the output end of the carbon dioxide gasifier connected to a carbonization cooler, the output end of the carbonization cooler connected to a carbonized ammonia water outlet pipe, a circulation pipe connected to the middle of the carbonized ammonia water outlet pipe, the output end of the circulation pipe connected to the carbonization tower, and the output end of the carbonized ammonia water outlet pipe connected to a densitometer.

[0011] Preferably, both the carbonization tower and the absorption water tank are connected to a level gauge on one side.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By setting up carbonization components, the liquefied carbon dioxide in the carbon dioxide storage tank has a purity of 99.5%, which is more easily absorbed by ammonia water. The liquid carbon dioxide is also vaporized, thereby maintaining the absorption thrust in the carbonization tower. At the same time, the buffering effect of the carbon dioxide buffer tank can stabilize the supply pressure and flow rate of carbon dioxide, avoid reaction fluctuations caused by unstable carbon dioxide supply, and help improve the stability of the reaction and product quality.

[0014] 2. This utility model uses a carbonization liquid discharge pump to first send the carbonization liquid at the bottom of the carbonization tower to the carbon dioxide vaporizer, and uses the heat of the carbonization liquid to vaporize the carbon dioxide, thus realizing effective energy recovery. Then, the carbonization liquid is cooled to a suitable temperature by the carbonization cooler 307, which helps to control the balance of the carbonization reaction and the crystallization process, and part of it is returned to the carbonization tower to reduce the temperature of the carbonization tower. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to this utility model.

[0016] In the picture:

[0017] 100. Ammonia water outlet pipe; 101. Ammonia water inlet pipe; 102. Exhaust gas outlet pipe; 103. Water injection pipe; 104. Ammonia water transfer pump; 105. Ammonia water online diluent; 107. Circulation pipe; 108. Density meter;

[0018] 200. Absorption tank; 201. Water pump;

[0019] 300. Carbonization tower; 301. Level gauge; 302. Carbonization mixer; 303. Carbon dioxide buffer tank; 304. Carbon dioxide vaporizer; 305. Carbonization liquid discharge pump; 306. Carbon dioxide storage tank; 307. Carbonization cooler; 308. Circulating return water pipe; 309. Circulating cooling water inlet pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1This embodiment provides a pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry, including a carbonization tower 300, a carbon dioxide storage tank 306, and an absorption water tank 200. The output end of the carbon dioxide storage tank 306 is connected to the input end of the carbonization tower 300 through a carbonization component. The input end of the carbonization component is equipped with a dilution component for diluting ammonia water. The exhaust end of the carbonization tower 300 is connected to a carbonization tail gas discharge pipe 102, and the other end of the carbonization tail gas discharge pipe 102 is connected to the absorption water tank 200. The input end of the absorption water tank 200 is connected to a water injection pipe 103, and the output end of the absorption water tank 200 is connected to a pumping component for pumping water from the carbonization tail gas to the dilution component. The bottom of the carbonization tower 300 is equipped with a conveying component for pumping the reacted carbonized liquid to the outside. The carbonization component includes a carbon dioxide vaporizer 304 connected to the output end of a carbon dioxide storage tank 306. The output end of the carbon dioxide vaporizer 304 is connected to a carbon dioxide buffer tank 303. The output end of the carbon dioxide buffer tank 303 is connected to a carbonization mixer 302. The output end of the carbonization mixer 302 is connected to the input end of the carbonization tower 300. Through the configuration of the carbonization component, the purity of the liquefied carbon dioxide in the carbon dioxide storage tank 306 is 99.5%, which is more easily absorbed by ammonia water and vaporizes the liquid carbon dioxide, thereby maintaining the absorption thrust in the carbonization tower 300. At the same time, the buffering function of the carbon dioxide buffer tank 303 can stabilize the supply pressure and flow rate of carbon dioxide, avoid reaction fluctuations caused by unstable carbon dioxide supply, and help improve the stability of the reaction and product quality.

[0022] Furthermore, the dilution assembly includes an online ammonia diluent 105 connected to the input end of the carbonization mixer 302. The input end of the online ammonia diluent 105 is connected to an ammonia delivery pump 104, and the input end of the ammonia delivery pump 104 is connected to an ammonia inlet pipe 101. The pumping assembly includes a water pump 201 connected to the output end of the absorption tank 200, and the output end of the water pump 201 is connected to the online ammonia diluent 105. Through the configuration of the pumping assembly, the water pump 201 delivers the water that has absorbed the carbonization tail gas in the absorption tank 200 to the online ammonia diluent 105, realizing the recycling of water. On the one hand, it reduces the amount of process water used and lowers the production cost. On the other hand, it uses the water that has absorbed the heat of the tail gas to dilute the ammonia, thus realizing energy recovery and utilization to a certain extent.

[0023] Furthermore, the conveying assembly includes a carbonization liquid discharge pump 305 connected to the output end of the carbonization tower 300. The output end of the carbonization liquid discharge pump 305 is connected to a carbon dioxide vaporizer 304. The output end of the carbon dioxide vaporizer 304 is connected to a carbonization cooler 307. The output end of the carbonization cooler 307 is connected to a carbonized ammonia water outlet pipe 100. A circulation pipe 107 is connected to the middle of the carbonized ammonia water outlet pipe 100. The output end of the circulation pipe 107 is connected to the carbonization tower 300. The carbonized ammonia water outlet... The output end of the water pipe 100 is connected to a densitometer 108. Through the setting of the conveying component, the carbonization liquid discharge pump 305 first sends the carbonization liquid at the bottom of the carbonization tower 300 to the carbon dioxide vaporizer 304. The heat of the carbonization liquid is used to vaporize the carbon dioxide, realizing the effective recovery of energy. Then, the carbonization liquid is cooled to a suitable temperature by the carbonization cooler 307, which helps to control the balance of the carbonization reaction and the crystallization process. Part of it is also returned to the carbonization tower 300 to reduce the temperature of the carbonization tower 300.

[0024] The carbonization cooler 307 is connected to a circulating return water pipe 308 and a circulating cooling water inlet pipe 309 on one side.

[0025] Preferably, a level gauge 301 is connected to one side of both the carbonization tower 300 and the absorption water tank 200. By setting up the level gauge 301, the level gauge 301 connected to one side of the carbonization tower 300 and the absorption water tank 200 can monitor the liquid level in the equipment in real time, so as to prevent the liquid level from being too high or too low from having an adverse effect on the reaction.

[0026] Working principle;

[0027] The gas discharged from the carbonization tower 300 enters the absorption water tank 200 through the carbonization tail gas discharge pipe 102. After being purified by the water injected into the absorption water tank 200, it is discharged into the atmosphere through the pipe of the absorption water tank 200. At the same time, water enters the absorption water tank 200 through the water injection pipe 103 and absorbs the carbonization tail gas discharged from the carbonization tower 300. Then, it is pumped into the ammonia water online diluent 105 by the water pump 201, where it is mixed with ammonia water to dilute the ammonia water online into a low concentration of ammonia water. The diluted ammonia water enters the carbonization mixer 302.

[0028] Liquid carbon dioxide in carbon dioxide storage tank 306 is vaporized by carbon dioxide vaporizer 304 and fed into carbon dioxide buffer tank 303. After being buffered by carbon dioxide buffer tank 303, the pressure is reduced and the flow rate is adjusted according to the set flow rate to enter carbonization mixer 302 and mixed with low concentration ammonia water in proportion, and then enters carbonization tower 300 for reaction.

[0029] The carbonized liquid discharge pump 305 pumps the carbonized liquid to the carbon dioxide vaporizer 304, and then to the carbonization cooler 307. Since the sublimation of carbon dioxide requires the absorption of heat, the heat in the carbonized liquid is absorbed, thereby cooling it to a safe temperature. The liquid is then transported to the outside through the carbonized ammonia water outlet pipe 100. At the same time, part of the carbonized ammonia water flows back to the carbonization tower 300 to cool it. The density meter 108 at the end of the carbonized ammonia water outlet pipe 100 is observed. When the reading indicates that the concentration of the ammonium bicarbonate and ammonia water mixed solution is qualified, the liquid is started to be collected. The qualified concentration of carbonized ammonia water is collected and discharged to the external product tank.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for pure carbon dioxide carbonization back-extraction agent in the rare earth smelting industry, characterized in that, The system includes a carbonization tower (300), a carbon dioxide storage tank (306), and an absorption water tank (200). The output end of the carbon dioxide storage tank (306) is connected to the input end of the carbonization tower (300) through a carbonization component. The input end of the carbonization component is equipped with a dilution component for diluting ammonia water. The exhaust end of the carbonization tower (300) is connected to a carbonization tail gas discharge pipe (102). The other end of the carbonization tail gas discharge pipe (102) is connected to the absorption water tank (200). The input end of the absorption water tank (200) is connected to a water injection pipe (103). The output end of the absorption water tank (200) is connected to a pumping component for pumping water from the carbonization tail gas to the dilution component. The bottom of the carbonization tower (300) is equipped with a conveying component for pumping the carbonized liquid after the reaction is completed to the outside.

2. The pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to claim 1, characterized in that: The carbonization assembly includes a carbon dioxide vaporizer (304) connected to the output end of a carbon dioxide storage tank (306), the output end of which is connected to a carbon dioxide buffer tank (303), the output end of which is connected to a carbonization mixer (302), and the output end of which is connected to the input end of a carbonization tower (300).

3. The pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to claim 2, characterized in that: The dilution assembly includes an online ammonia diluent (105) connected to the input of the carbonization mixer (302), the input of the online ammonia diluent (105) being connected to an ammonia delivery pump (104), and the input of the ammonia delivery pump (104) being connected to an ammonia inlet pipe (101).

4. The pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to claim 3, characterized in that: The pumping assembly includes a water pump (201) connected to the output of the absorption tank (200), the output of which is connected to an online ammonia diluent (105).

5. A pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to claim 4, characterized in that: The conveying assembly includes a carbonized liquid discharge pump (305) connected to the output end of the carbonization tower (300), the output end of the carbonized liquid discharge pump (305) connected to a carbon dioxide gasifier (304), the output end of the carbon dioxide gasifier (304) connected to a carbonization cooler (307), the output end of the carbonization cooler (307) connected to a carbonized ammonia water outlet pipe (100), the middle part of the carbonized ammonia water outlet pipe (100) connected to a circulation pipe (107), the output end of the circulation pipe (107) connected to the carbonization tower (300), and the output end of the carbonized ammonia water outlet pipe (100) connected to a densitometer (108).

6. A pure carbon dioxide carbonization back-extraction agent device for the rare earth smelting industry according to claim 5, characterized in that: The carbonization tower (300) and the absorption water tank (200) are both connected to a level gauge (301) on one side.

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