Airflow oscillation regeneration device for treating solid hazardous waste salt
By using an airflow oscillation regeneration device, which utilizes an ultrasonic oscillator and stirring device within the airflow oscillation reaction tower, the problems of low conversion rate and resource waste in the treatment of solid hazardous waste salts have been solved, achieving efficient resource utilization of solid hazardous waste salts and improving the purity of sodium bicarbonate and ammonium chloride.
Patent Information
- Application Number
- CN202520173155.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-26
AI Technical Summary
In existing technologies, the treatment methods for solid hazardous waste salts, such as landfilling and high-temperature oxidation, are costly and wasteful of resources. Existing regeneration devices have low reaction conversion rates, which affect the quality of sodium bicarbonate.
An airflow oscillation regeneration device is adopted, including a sodium precipitation system, an ammonium chloride precipitation system, a crude and deammoniation system, and a sodium bicarbonate refining system. The ultrasonic oscillator and stirring device in the airflow oscillation reaction tower improve the uniformity of material mixing and reduce the use of agitators and transfer pumps.
It improves the reaction conversion rate of solid hazardous waste salt, enhances the production quality of sodium bicarbonate and ammonium chloride, reduces production costs, and is suitable for large-scale production with an annual waste salt processing capacity of up to 100,000 tons.
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Figure CN223761002U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waste treatment applications, specifically relating to an airflow oscillation regeneration device for treating solid hazardous waste salt. Background Technology
[0002] According to incomplete statistics, the annual production of solid and hazardous waste salts from industries such as fine chemicals, high-concentration wastewater, printing and dyeing, pharmaceuticals, pesticides, metallurgy, phosphorus chemicals, new energy, lithium iron phosphate, ternary cathode materials, and coal chemicals exceeds 30 million tons. These solid and hazardous waste salts contain a variety of harmful substances. If not properly treated, these waste salts containing complex organic matter will pose a serious threat to the environment. Furthermore, these waste salts are also a concentrated resource, and their level of danger and environmental harm may not necessarily be greater than other chemical products. However, as long as they are treated in accordance with regulations and resource-based disposal processes are rationally designed, they can generate both significant social and economic benefits.
[0003] Currently, the main methods for disposing of solid hazardous waste salt in China include landfill, high-temperature oxidation, and salt washing. Landfill is the primary method, but it suffers from several problems: high investment, large land occupation, and soil pollution; the scarcity of rigid landfills in my country; and high landfill costs, ranging from 2,500 to 4,000 yuan per ton of waste salt depending on the region, which is unaffordable for most enterprises. Furthermore, solid hazardous waste salt contains many valuable chemical resources that are not properly recycled, resulting in significant waste. High-temperature oxidation and salt washing both require complex equipment for pollution-free treatment, leading to even higher costs.
[0004] In existing technical solutions, such as application announcement number CN 117326572 A method and apparatus for regenerating hazardous waste salt includes a hazardous waste salt refining system, a sodium bicarbonate reaction system, a product refining system, and an ammonium chloride system. The hazardous waste salt is subjected to high-temperature pyrolysis, dissolution, refining, evaporation, and centrifugation to obtain refined salt. The refined salt is then fed into the sodium bicarbonate reaction system and the ammonium chloride system. The sodium bicarbonate reaction system reacts with the refined salt using the mother liquor from the ammonium chloride system, adjusting the particle size, and centrifuging to obtain sodium bicarbonate. The ammonium chloride system uses the remaining mother liquor from the sodium bicarbonate reaction system, adds refined salt to precipitate ammonium chloride, and performs subsequent operations to finally obtain the byproduct ammonium chloride. The product refining system uses the sodium bicarbonate produced by the sodium bicarbonate reaction system to decompose into soda ash through heating. However, the sodium bicarbonate reaction system uses the mother liquor from the ammonium chloride system and refined salt to react in an atmospheric pressure reactor to produce sodium bicarbonate. This reaction has a low conversion rate, as low as about 70%, and the generated sodium bicarbonate contains some sodium carbonate, affecting the quality of the sodium bicarbonate. Furthermore, multiple stirrers and transfer pumps are added to the reactor, and under mechanical shearing force, the particle size of the sodium bicarbonate is reduced. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and propose an airflow oscillation regeneration device for treating solid hazardous waste salt, which can improve the reaction conversion rate of solid hazardous waste salt and improve the quality of baking soda.
[0006] To achieve the above objectives, the present invention proposes the following technical solution:
[0007] An airflow oscillation regeneration device for treating solid hazardous waste salt includes a sodium precipitation system, an ammonium chloride precipitation system, a sodium bicarbonate crude treatment system, an ammonia removal system, and a sodium bicarbonate refining system.
[0008] The sodium precipitation system includes a sodium chloride slurry tank, a first sodium precipitation tower, a second sodium precipitation tower, a sodium precipitation filter, and a first masterbatch storage tank, all connected in sequence by pipelines. The first masterbatch storage tank is connected to the sodium precipitation filter via a pipeline. The top of the second sodium precipitation tower is equipped with a first tail gas output pipe connected to the first sodium precipitation tower. The ammonium chloride precipitation system includes a cold precipitation tower, a salting-out tower, an ammonium chloride filter, an ammonium chloride centrifuge, and an ammonium chloride packaging machine, all connected in sequence by pipelines. The second masterbatch storage tank is connected to the ammonium chloride filter via a pipeline. The cold precipitation tower is connected to the first masterbatch storage tank via a pipeline. The top of the salting-out tower is equipped with a second tail gas output pipe connected to the cold precipitation tower.
[0009] The sodium bicarbonate crude processing system includes an airflow oscillating reaction tower, a pre-reaction tower, an ammonium bicarbonate slurry tank, a crude sodium bicarbonate filter, a crude mother stock tank connected to the crude sodium bicarbonate filter via pipelines, a water washing tower, a separator, and a CO2 compressor. The airflow oscillating reaction tower is connected to the pre-reaction tower, the ammonium bicarbonate slurry tank, the crude sodium bicarbonate filter, and the CO2 compressor via pipelines. The top of the airflow oscillating reaction tower is equipped with a third tail gas output pipe connected to the pre-reaction tower. The water washing tower is connected to the pre-reaction tower via pipelines. The water washing tower, the separator, and the CO2 compressor are connected sequentially via pipelines. The CO2 compressor is connected to the second sodium precipitation tower and the salting-out tower via pipelines. The crude mother stock tank is connected to the first sodium precipitation tower via pipelines.
[0010] The deammoniation system includes a first deammoniation vessel and a second deammoniation vessel connected by pipelines. The first deammoniation vessel is connected by pipelines to a coarse sodium bicarbonate filter, a sodium precipitation filter, and a second pre-refining tank, respectively. The sodium bicarbonate refining system includes a sodium bicarbonate filter, a sodium bicarbonate centrifuge, a sodium bicarbonate dryer, and a semi-brine storage tank connected by pipelines. The sodium bicarbonate filter is connected by pipelines to the second deammoniation vessel, and the semi-brine storage tank is connected by pipelines to a sodium chloride slurry tank.
[0011] Preferably, the first and second sodium precipitation towers are used in series to perform secondary sodium precipitation, ensuring the conversion rate of the sodium precipitation system.
[0012] Preferably, the sodium chloride slurry tank is connected to the first sodium precipitation tower via a pipeline equipped with a sodium chloride slurry transfer pump; the first sodium precipitation tower is connected to the second sodium precipitation tower via a pipeline equipped with a sodium precipitation transfer pump; the first masterbatch storage tank is connected to the cold precipitation tower via a pipeline equipped with a first masterbatch transfer pump; the first ammonia removal vessel is connected to the second ammonia removal vessel via a pipeline equipped with a first ammonia removal transfer pump, and the second ammonia removal vessel is connected to the sodium bicarbonate filter via a pipeline equipped with a second ammonia removal transfer pump; the salting-out tower is connected to the cold precipitation tower via a pipeline equipped with a salting-out transfer pump, and to the ammonium chloride filter via a pipeline equipped with an ammonium chloride transfer pump; the second masterbatch storage tank is connected to the pre-reaction tower via a pipeline equipped with a second masterbatch transfer pump; the pre-reaction tower is connected to the airflow oscillating reaction tower via a pipeline equipped with a pre-liquid transfer pump; and the ammonium bicarbonate slurry tank is connected to the airflow oscillating reaction tower via a pipeline equipped with an ammonium bicarbonate slurry transfer pump.
[0013] Preferably, the gas flow oscillation reaction tower is equipped with an ultrasonic oscillator, which on the one hand ensures uniform mixing of materials in the tower, and on the other hand prevents the sodium bicarbonate produced in the reaction from forming scale and sticking to the wall.
[0014] Preferably, the top of the gas flow oscillation reaction tower is equipped with a stirring device to mix the incoming ammonium bicarbonate slurry and preparative liquid evenly and allow them to react fully, thereby improving the conversion rate.
[0015] Preferably, the water washing tower is equipped with a water washing tower circulating spray pump, the pre-reaction tower is equipped with a fourth tail gas output pipe connected to the water washing tower, and the water washing tower is equipped with a gas output pipe connected to the separator. Under the action of the water washing tower circulating spray pump, the ammonia gas in the tail gas output from the pre-reaction tower is sprayed and absorbed in the water washing tower, so that the CO2 in the tail gas is transported to the separator.
[0016] Preferably, the cold separation tower is equipped with a cooling coil, which reduces the temperature inside the tower through heat exchange with the refrigerant in the coil, and is also equipped with an ultrasonic device to reduce the crystallization of materials on the cooling coil.
[0017] Specifically, industrial waste salts generated in industries such as petrochemicals, coal chemicals, and metallurgy are prepared into sodium chloride slurry in a sodium chloride slurry preparation tank. This slurry is then pumped to the first sodium precipitation tower via an ammonium chloride slurry pump. The crude mother liquor from the crude mother liquor tank is also sent to the first sodium precipitation tower. Tail gas from the top of the second sodium precipitation tower is sent to the first sodium precipitation tower, where it is stirred and mixed under the influence of the tail gas. The mixture is then pumped to the second sodium precipitation tower via a sodium precipitation transfer pump. CO2 gas from a CO2 compressor is introduced into the second sodium precipitation tower, where the solid and liquid components undergo a oscillating and mixing reaction under the influence of the CO2 gas. The mixture in the second sodium precipitation tower is then centrifuged using a sodium precipitation filter, and the resulting first refined mother liquor is sent to a first refined mother liquor tank for storage. The first refined mother liquor in the first refined mother liquor tank is then processed by the... The mother liquor is pumped to a cold precipitation tower, where it is cooled by a refrigerant to precipitate ammonium chloride. The solid-liquid mixture overflows into a salting-out tower, where ammonium chloride slurry from an ammonium chloride slurry tank is introduced at a certain ratio. CO2 gas from a CO2 compressor is introduced into the bottom of the salting-out tower, and the solid-liquid mixture inside the tower is shaken, mixed, and dissolved under the action of the CO2 gas. The tail gas from the top of the salting-out tower is discharged to the cold precipitation tower for agitation. The ammonium chloride slurry generated in the middle of the salting-out tower is pumped to an ammonium chloride filter for solid-liquid separation. The resulting solid ammonium chloride is further dehydrated by an ammonium chloride centrifuge and then packaged by an ammonium chloride baler to output the finished ammonium chloride product.
[0018] The sodium chloride slurry undergoes two sodium precipitation processes followed by cold precipitation, while the coarse sodium bicarbonate undergoes two deammoniation processes followed by dehydration, further improving the reaction conversion rate of industrial waste salt.
[0019] The second mother liquor obtained after solid-liquid separation by ammonium chloride centrifuge is sent to the second mother liquor storage tank for storage, and then transported to the pre-reaction tower via the second mother liquor transfer pump. Under certain reaction temperature and pressure, the tail gas from the top of the airflow oscillation reaction tower is sent to the pre-reaction tower. Under the airflow oscillation of the tail gas, the reaction and absorption take place in the pre-reaction tower to produce a preparative liquid. The tail gas from the top of the pre-reaction tower is discharged to the water washing tower, where the ammonia gas in the tail gas is absorbed by the water washing tower through the circulating spray pump. The remaining CO2 is separated to remove moisture, and then mixed with fresh CO2 gas and enters the CO2 compressor to be compressed to 0.1~0.2MPa for recycling. The compressed CO2 gas is supplied to the airflow oscillation reaction tower, the second sodium precipitation tower, and the salting-out tower to produce an oscillating mixing effect, optimize the reaction effect, and at the same time, ensure that all the small amount of carbonate ions present in the reaction are converted into sodium bicarbonate, thereby improving the reaction conversion rate of solid hazardous waste salt.
[0020] The preparative liquid is pumped to the airflow oscillating reaction tower via a preparative liquid transfer pump, and the ammonium bicarbonate slurry is pumped to the airflow oscillating reaction tower via an ammonium bicarbonate slurry transfer pump. The preparative liquid and ammonium bicarbonate slurry are mixed in a certain proportion. A CO2 compressor supplies CO2 gas to the airflow oscillating reaction tower, and the mixture reacts under the action of airflow oscillation to produce coarse sodium bicarbonate. The coarse sodium bicarbonate is centrifuged by a coarse sodium bicarbonate filter. The coarse sodium bicarbonate solid after centrifugation and the solids after sodium precipitation filter centrifugation are successively sent to the first deammoniation reactor and the second mother liquor tank. The second mother liquor is pumped to the first deammoniation reactor via the second mother liquor transfer pump. Deammoniation is carried out in the first deammoniation reactor. The mixture is then pumped to the second deammoniation reactor via the first deammoniation transfer pump for a second deammoniation. After that, it is pumped to the sodium bicarbonate filter via the second deammoniation transfer pump. The sodium bicarbonate solid obtained by centrifugation in the sodium bicarbonate filter is further centrifuged and dehydrated by the sodium bicarbonate centrifuge, and then further dried with sodium bicarbonate desiccant to finally obtain refined sodium bicarbonate. The crude mother liquor after centrifugation in the crude sodium bicarbonate filter is sent to the crude mother liquor tank for storage and later use.
[0021] The beneficial effects of this utility model are as follows:
[0022] This invention establishes a complete airflow oscillation regeneration device and method for treating solid hazardous waste salt by setting up a sodium precipitation system, an ammonium chloride precipitation system, a sodium bicarbonate crude treatment system, an ammonia removal system, and a sodium bicarbonate refining system, which work together in close coordination to form a complete system. It is suitable for large-scale production with an annual waste salt processing capacity of up to 100,000 tons.
[0023] This invention utilizes airflow oscillation reaction. By disturbing the airflow, the reactants are fully mixed and reacted in the reaction tower, which improves the reaction efficiency of sodium precipitation, ammonium chloride precipitation, and crude sodium bicarbonate, thereby increasing the reaction conversion rate of solid hazardous waste salts and improving the production quality of sodium bicarbonate and ammonium chloride.
[0024] This invention utilizes airflow oscillation in an airflow oscillation reaction tower to ensure thorough mixing and reaction of the reactants within the tower, reducing the need for agitators. Furthermore, it minimizes the use of transfer pumps in both the sodium bicarbonate coarse and refined sodium bicarbonate systems, thereby guaranteeing the required particle size of the sodium bicarbonate.
[0025] By adopting the above scheme, this utility model can improve the reaction conversion rate of solid hazardous waste salt and improve the production quality of sodium bicarbonate and ammonium chloride. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0027] Figure 1 This is the overall process flow diagram of this utility model.
[0028] In the diagram, 1-Separator; 2-Washing tower; 3-Pre-reaction tower; 4-Airflow oscillating reaction tower; 5-Ammonium bicarbonate slurry tank; 6-Coarse sodium bicarbonate filter; 7-Coarse mother stock tank; 8-Washing tower circulating spray pump; 9-Preparation liquid transfer pump; 10-CO2 compressor; 11-Ammonium bicarbonate slurry transfer pump; 12-Sodium bicarbonate centrifuge; 13-Sodium bicarbonate dryer; 14-Sodium bicarbonate filter; 15-Semi-brine storage tank; 16-Second ammonia removal vessel; 17-First ammonia removal vessel; 18-First ammonia removal transfer pump; 19-The... 20-Sodium chloride slurry transfer pump; 21-Sodium chloride slurry transfer pump; 22-First sodium precipitation tower; 23-Sodium precipitation transfer pump; 24-Second sodium precipitation tower; 25-Sodium precipitation filter; 26-First masterbatch storage tank; 27-First masterbatch transfer pump; 28-Salting out tower; 29-Salting out transfer pump; 30-Cold precipitation tower; 31-Ammonium chloride transfer pump; 32-Second masterbatch transfer pump; 33-Second masterbatch storage tank; 34-Ammonium chloride filter; 35-Ammonium chloride centrifuge; 36-Ammonium chloride baler. Detailed Implementation
[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0033] like Figure 1 As shown, an airflow oscillation regeneration device for treating solid hazardous waste salt includes a sodium precipitation system, an ammonium chloride precipitation system, a sodium bicarbonate crude treatment system, an ammonia removal system, and a sodium bicarbonate refining system.
[0034] The sodium precipitation system includes a sodium chloride slurry tank 20, a first sodium precipitation tower 22, a second sodium precipitation tower 24, a sodium precipitation filter 25, and a first masterbatch storage tank 26, which are connected in sequence by pipelines. The first masterbatch storage tank 26 is connected to the sodium precipitation filter 25 by pipelines. The top of the second sodium precipitation tower 24 is provided with a first tail gas output pipe connected to the first sodium precipitation tower 22. The ammonium chloride precipitation system includes a cold precipitation tower 30, a salt precipitation tower 28, an ammonium chloride filter 34, an ammonium chloride centrifuge 35, and an ammonium chloride baler 36, which are connected in sequence by pipelines. The second masterbatch storage tank 33 is connected to the ammonium chloride filter 36 by pipelines. The cold precipitation tower 30 is connected to the first masterbatch storage tank 26 by pipelines. The top of the salt precipitation tower 28 is provided with a second tail gas output pipe connected to the cold precipitation tower 30.
[0035] The sodium bicarbonate crude processing system includes an airflow oscillating reaction tower 4, a pre-reaction tower 3, an ammonium bicarbonate slurry tank 5, a crude sodium bicarbonate filter 6, a crude mother stock tank 7 connected to the crude sodium bicarbonate filter 6 via pipelines, a water washing tower 2, a separator 1, and a CO2 compressor 10. The airflow oscillating reaction tower 4 is connected to the pre-reaction tower 3, the ammonium bicarbonate slurry tank 5, the crude sodium bicarbonate filter 6, and the CO2 compressor 10 via pipelines. The top of the airflow oscillating reaction tower 4 is equipped with a third tail gas output pipe connected to the pre-reaction tower 3. The water washing tower 2 is connected to the pre-reaction tower 3 via pipelines. The water washing tower 2, the separator 1, and the CO2 compressor 10 are connected sequentially via pipelines. The CO2 compressor 10 is connected to the second sodium precipitation tower 24 and the salting-out tower 28 via pipelines. The crude mother stock tank 7 is connected to the first sodium precipitation tower 22 via pipelines.
[0036] The deammoniation system includes a first deammoniation vessel 17 and a second deammoniation vessel 16 connected by pipelines. The first deammoniation vessel 17 is connected by pipelines to a coarse sodium bicarbonate filter 6, a sodium precipitation filter 25, and a second refined mother stock tank 33, respectively. The sodium bicarbonate refining system includes a sodium bicarbonate filter 14, a sodium bicarbonate centrifuge 12, a sodium bicarbonate dryer 13, and a semi-brine storage tank 15 connected to the sodium bicarbonate filter 14, which are connected by pipelines in sequence. The sodium bicarbonate filter 14 is connected to the second deammoniation vessel 16 by pipelines, and the semi-brine storage tank 15 is connected to a sodium chloride pulping tank 20 by pipelines.
[0037] The first sodium precipitation tower 22 and the second sodium precipitation tower 24 are used in series to perform secondary sodium precipitation, ensuring the conversion rate of the sodium precipitation system.
[0038] The sodium chloride slurry preparation tank 20 is connected to the first sodium precipitation tower 22 via a pipeline equipped with a sodium chloride slurry transfer pump 21; the first sodium precipitation tower 22 is connected to the second sodium precipitation tower 24 via a pipeline equipped with a sodium precipitation transfer pump 23; the first mother liquor storage tank 26 is connected to the cold precipitation tower 30 via a pipeline equipped with a first mother liquor transfer pump 27; the first ammonia removal vessel 17 is connected to the second ammonia removal vessel 16 via a pipeline equipped with a first ammonia removal transfer pump 18, and the second ammonia removal vessel 16 is connected to the small... The soda filter 14 is connected; the salting-out tower 28 is connected to the cold precipitation tower 30 through a pipe equipped with a salting-out transfer pump 29, and is connected to the ammonium chloride filter 34 through a pipe equipped with an ammonium chloride transfer pump 31; the second mother stock storage tank 33 is connected to the pre-reaction tower 3 through a pipe equipped with a second mother stock transfer pump 32; the pre-reaction tower 3 is connected to the airflow oscillating reaction tower 4 through a pipe equipped with a pre-liquid transfer pump 9; the ammonium bicarbonate slurry tank 5 is connected to the airflow oscillating reaction tower 4 through a pipe equipped with an ammonium bicarbonate slurry transfer pump 11.
[0039] The airflow oscillation reaction tower 4 is equipped with an ultrasonic oscillator, which on the one hand ensures that the materials in the tower are mixed evenly, and on the other hand prevents the sodium bicarbonate produced in the reaction from forming scale and sticking to the wall.
[0040] The gas flow oscillation reaction tower 4 is equipped with a stirring device at the top, which is used to mix the incoming ammonium bicarbonate slurry and preparative liquid evenly and allow them to react fully, thereby improving the conversion rate.
[0041] The water washing tower 3 is equipped with a water washing tower circulating spray pump 8, and the pre-reaction tower 3 is equipped with a fourth tail gas output pipe, which is connected to the water washing tower 2. The water washing tower 2 is equipped with a gas output pipe connected to the separator 1. Under the action of the water washing tower circulating spray pump, the ammonia gas in the tail gas output from the pre-reaction tower 3 is sprayed and absorbed in the water washing tower 2, so that the CO2 in the tail gas is transported to the separator 1.
[0042] The cold separation tower 30 is equipped with a cooling coil, which reduces the temperature inside the tower by heat exchange through the refrigerant in the coil. It is also equipped with an ultrasonic device to reduce the crystallization of materials on the cooling coil.
[0043] Using the apparatus provided in the first embodiment, industrial waste salt is regenerated and converted, and the final reaction conversion rate of industrial waste salt is increased to 80%, the purity of baking soda is increased by 20%, and the purity of ammonium chloride is also increased by 10%.
[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A gas stream shockwave regenerative device for treating solid waste salt, characterized by: The system comprises a sodium precipitation system, an ammonium chloride precipitation system, a bicarbonate crude system, an ammonia removal system, and a bicarbonate refining system; the sodium precipitation system comprises a sodium chloride pulping tank, a first sodium precipitation tower, a second sodium precipitation tower, a sodium precipitation belt filter, and a first refined mother liquor tank connected by pipelines in sequence, the second sodium precipitation tower is connected with the first sodium precipitation tower by a first tail gas output pipe; the ammonium chloride precipitation system comprises a cold precipitation tower, a salt precipitation tower, an ammonium chloride belt filter, an ammonium chloride centrifuge, an ammonium chloride packer, and a second refined mother liquor tank connected by pipelines in sequence, the cold precipitation tower is connected with the first refined mother liquor tank by a pipeline, the salt precipitation tower is connected with the cold precipitation tower by a second tail gas output pipe; the bicarbonate crude system comprises an airflow oscillation reaction tower, a pre-reaction tower, a carbon ammonium pulping tank, a crude bicarbonate belt filter, a crude mother liquor tank connected with the crude bicarbonate belt filter, a water washing tower, a separator, and a CO2 compressor, the airflow oscillation reaction tower is connected with the pre-reaction tower, the carbon ammonium pulping tank, the crude bicarbonate belt filter, and the CO2 compressor by pipelines respectively, the airflow oscillation reaction tower is connected with the pre-reaction tower by a third tail gas output pipe, the water washing tower is connected with the pre-reaction tower by a pipeline, the water washing tower, the separator, and the CO2 compressor are connected by pipelines in sequence; the CO2 compressor is connected with the second sodium precipitation tower and the salt precipitation tower by pipelines, the crude mother liquor tank is connected with the first sodium precipitation tower by a pipeline; the ammonia removal system comprises a first ammonia removal kettle and a second ammonia removal kettle connected by a pipeline, the first ammonia removal kettle is connected with the crude bicarbonate belt filter, the sodium precipitation belt filter, and the second refined mother liquor tank by pipelines respectively; the bicarbonate refining system comprises a bicarbonate belt filter, a bicarbonate centrifuge, a bicarbonate dryer, and a semi-halogen water tank connected with the bicarbonate belt filter by pipelines in sequence, the bicarbonate belt filter is connected with the second ammonia removal kettle by a pipeline, and the semi-halogen water tank is connected with the sodium chloride pulping tank by a pipeline.
2. The device for regenerating a gas stream from solid waste salts according to claim 1, characterized in that: The sodium chloride pulping tank is connected with the first sodium precipitation tower by a pipeline provided with a sodium chloride slurry transfer pump; the first sodium precipitation tower is connected with the second sodium precipitation tower by a pipeline provided with a sodium precipitation transfer pump; the first refined mother liquor tank is connected with the cold precipitation tower by a pipeline provided with a first refined mother liquor transfer pump; the first ammonia removal kettle is connected with the second ammonia removal kettle by a pipeline provided with a first ammonia removal transfer pump; the second ammonia removal kettle is connected with the bicarbonate belt filter by a pipeline provided with a second ammonia removal transfer pump; the salt precipitation tower is connected with the cold precipitation tower by a pipeline provided with a salt precipitation transfer pump, and connected with the ammonium chloride belt filter by a pipeline provided with an ammonium chloride transfer pump; the second refined mother liquor tank is connected with the pre-reaction tower by a pipeline provided with a second refined mother liquor transfer pump; the pre-reaction tower is connected with the airflow oscillation reaction tower by a pipeline provided with a pre-prepared liquid transfer pump; the carbon ammonium pulping tank is connected with the airflow oscillation reaction tower by a pipeline provided with a carbon ammonium slurry transfer pump.
3. The device for regenerating solid waste salt by gas flow shock according to claim 1, characterized in that: An ultrasonic oscillator is arranged in the airflow oscillation reaction tower, and a stirring device is arranged at the top of the airflow oscillation reaction tower.
4. The device for regenerating solid waste salt by gas flow shock according to claim 1, characterized in that: The water washing tower is provided with a water washing tower circulating spray pump, the pre-reaction tower is provided with a fourth tail gas output pipe connected with the water washing tower, and the water washing tower is provided with a gas output pipe connected with the separator.
5. The device for regenerating solid waste salt by gas flow shock according to claim 1, characterized in that: The cooling disc pipe is arranged in the cold precipitation tower, and is matched with an ultrasonic device.
Citation Information
Patent Citations
Solid hazardous waste salt regeneration device and method
CN117326572A