Fly ash mineralization device

Abstract

The utility model provides a fly ash mineralization device. Including: support frame, feeding system, leaching reaction kettle, first filter, mineralization system and second filter. Among them, the feeding system is installed in the position of support frame near one side wall. The leaching reaction kettle is arranged in the position of support frame near the side wall of feeding system one side, and is configured to be connected with the feeding system. The first filter is arranged in the middle position of support frame, and is connected with the discharge port of leaching reaction kettle. The mineralization system is arranged in the position of support frame away from the side wall of feeding system one side. The second filter is arranged in the middle position of support frame, and is connected with the discharge port of mineralization system. Fly ash mineralization device can selectively leach calcium ions in fly ash solid through the filtering effect of first filter and second filter.

Description

Technical Field

[0001] This utility model relates to the field of solid waste resource utilization, and in particular to a fly ash mineralization device. Background Technology

[0002] The combustion of fossil fuels not only brings CO2 emissions, but also presents a significant challenge in handling the large quantities of alkaline solid waste generated. my country's annual fly ash production exceeds 800 million tons, making it one of the largest accumulated solid wastes. Carbon dioxide capture, utilization, and storage (CCUS) technology is the only effective carbon removal technology, necessitating the development of low-cost carbon sequestration solutions. Utilizing the high alkalinity and large specific surface area of ​​this type of solid waste, a carbonation reaction with carbon dioxide can produce high-value-added products. This approach can solve the problems of solid waste accumulation and carbon emissions from coal-fired power plants, while also generating direct economic benefits and possessing promising market prospects.

[0003] However, some conventional fly ash mineralization devices still have shortcomings. On the one hand, current conventional fly ash mineralization devices cannot effectively and selectively leach calcium ions. On the other hand, the leaching agent in the reaction process of current conventional fly ash mineralization devices cannot be effectively recycled, and the loss of leaching agent leads to a large amount of resource waste. Utility Model Content

[0004] One objective of this invention is to overcome at least one deficiency in the prior art and to provide a fly ash mineralization device.

[0005] A further objective of this invention is to use a first filter to separate the leaching solution before the mineralization reaction and to use a second filter to separate solid calcium carbonate after the mineralization reaction, thereby effectively and selectively leaching calcium ions.

[0006] Another further objective of this invention is to utilize the first filtrate device, the second filtrate device, the first cleaning device, and the second cleaning device to regenerate the leaching agent during the reaction process of the fly ash mineralization device, thereby effectively controlling the cost of the leaching agent.

[0007] Specifically, this utility model provides a fly ash mineralization device, comprising: a support frame; a feeding system installed on one side wall of the support frame for feeding fly ash solids and a leaching agent into the fly ash mineralization device; a leaching reactor disposed within the support frame near the side wall of the feeding system and configured to connect to the feeding system so that the fly ash solids and the leaching agent react within the leaching reactor; a first filter disposed in the middle of the support frame and connected to the outlet of the leaching reactor for separating the leaching liquid and solid waste generated in the leaching reactor; a mineralization system disposed within the support frame on the side wall away from the feeding system for using the leaching liquid for mineralization reaction; and a second filter disposed in the middle of the support frame and connected to the outlet of the mineralization system for separating the solid calcium carbonate and leaching liquid generated in the mineralization reaction.

[0008] Optionally, the fly ash mineralization device further includes: a first filtrate device, located between the leaching reactor and the second filter, connected to the outlet of the first filter, for filtering the leaching liquid output by the first filter; and a second filtrate device, located between the mineralization system and the second filter, connected to the outlet of the second filter, for filtering the leaching liquid output by the second filter.

[0009] Optionally, the fly ash mineralization device further includes: a first cleaning device, spaced apart on the side of the first filter near the feeding system, for storing cleaning liquid, and configured such that the inlet of the first cleaning device is connected to the first filter, so that the leaching liquid reacts with the cleaning liquid to generate an extractant; and a second cleaning device, spaced apart on the side of the first filter away from the feeding system, for storing cleaning liquid, and configured such that the inlet of the second cleaning device is connected to the second filter, so that the leaching liquid reacts with the cleaning liquid to generate an extractant.

[0010] Optionally, the mineralization system includes: a mineralization reactor connected to a first filtrate device, and a leaching solution prepared for mineralization reaction in the mineralization reactor.

[0011] Optionally, the mineralization reactor includes a bubble distributor disposed at the bottom of the mineralization reactor for generating carbon dioxide bubbles, so that the carbon dioxide bubbles penetrate the leachate from bottom to top.

[0012] Optionally, the mineralization system further includes: a mixing tank, connected to the mineralization reactor, for mixing the gases required for the mineralization reaction and then introducing them into the mineralization reactor; and a condenser, connected to the mineralization reactor, for regulating the dew point of the gases required for the mineralization reaction.

[0013] Optionally, the feeding system includes: a feeder, located outside the support frame, for conveying fly ash solids to the leaching reactor; and a batching device, located inside the support frame, for mixing amino acid solids with water to obtain an extractant, and conveying the extractant to the leaching reactor.

[0014] Optionally, the feeding system also includes a conveyor, located between the feeder and the leaching reactor, for conveying fly ash solids into the leaching reactor.

[0015] Optionally, the leaching reactor includes a stirrer disposed at the bottom of the leaching reactor for stirring the fly ash solids and the leaching agent.

[0016] Optionally, the fly ash mineralization device also includes a pressure sensor connected to the leaching reactor for measuring the internal pressure of the leaching reactor.

[0017] The fly ash mineralization device provided by this utility model includes a feeding system that delivers solid fly ash and a leaching agent into the device, where a leaching reaction occurs in a leaching reactor. A first filter separates the leaching solution and solid waste generated in the reactor; the leaching solution is then used for mineralization in the mineralization system. A second filter separates the solid calcium carbonate generated in the mineralization reaction from the leaching solution. This fly ash mineralization device can effectively and selectively leach calcium ions.

[0018] Furthermore, the first and second filtrate devices can be used to filter the leaching liquid, and the first and second cleaning devices can be used to regenerate the leaching agent during the reaction process of the fly ash mineralization device, which can effectively control the cost of the leaching agent.

[0019] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a perspective view of a fly ash mineralization device according to an embodiment of the present invention; Figure 2 This is a connection diagram of a fly ash mineralization device according to an embodiment of the present invention. Detailed Implementation

[0021] This utility model provides a fly ash mineralization device 10. For example... Figure 1 and Figure 2 As shown, the fly ash mineralization device 10 of this embodiment generally includes a support frame 100, a feeding system 110, a leaching reactor 120, a first filter 131, a mineralization system 140, and a second filter 132. The support frame 100 provides support and housing space for the fly ash mineralization device 10. The feeding system 110 can be installed near one side wall of the support frame 100 to feed fly ash solids and leaching agent into the fly ash mineralization device 10.

[0022] Furthermore, the feeding system 110 may include a feeder 111, a batching device 112, and a conveyor 113. The feeder 111 may be located outside the support frame 100 and is used to transport fly ash solids to the leaching reactor 120. The feeder 111 may be a bucket feeder 111, and the bucket feeder 111 may also integrate a ventilation unit to prevent fly ash particles from spreading to the surrounding environment and causing dust pollution.

[0023] The mixing device 112 can be disposed within the support frame 100, and is used to mix amino acid solids with water to obtain an extractant, and to transport the extractant to the leaching reactor 120. The amino acid can be one or a mixture of serine, glutamic acid, lysine, and glycine. Preferably, the concentration of the extractant can be from 0.1 to 10 mol / L, and the flow rate of the extractant can be less than 200 L / h.

[0024] The conveyor 113 can be installed between the feeder 111 and the leaching reactor 120 to transport fly ash solids into the leaching reactor 120. The conveyor 113 can be a screw conveyor 113, and the screw conveyor 113 is equipped with a variable frequency motor to adjust the fly ash feeding rate and feeding volume.

[0025] The leaching reactor 120 can be located within the support frame 100 near the side wall of the feeding system 110 and configured to connect to the feeding system 110, so that the fly ash solids and the leaching agent react within the leaching reactor 120. Within the leaching reactor 120, the fly ash solids and the leaching agent are stirred until dissolution equilibrium is reached, and then the mixed solution, stirred to dissolution equilibrium, undergoes a leaching reaction to obtain the reacted slurry. Preferably, the stirring speed within the leaching reactor 120 can be 50 to 1000 rpm, and the leaching reaction temperature can be 15 to 35°C. The leaching time is 10 to 200 minutes.

[0026] Furthermore, the leaching reactor 120 may include a stirrer 121 disposed at the bottom of the leaching reactor 120 for stirring the fly ash solid and the leaching agent, so that the fly ash solid and the leaching agent can react fully, improve the yield of the leaching solution, and thus improve the yield of solid calcium carbonate.

[0027] In some optional embodiments, the fly ash mineralization device 10 may further include a pressure sensor 122. The pressure sensor 122 is connected to the leaching reactor 120 and is used to measure the internal pressure of the leaching reactor 120. Monitoring the internal pressure of the reactor can, on the one hand, monitor the reaction progress and process status based on the pressure measured by the pressure sensor 122, and on the other hand, prevent overpressure in the fly ash mineralization device 10, thus eliminating the occurrence of safety accidents.

[0028] The first filter 131 can be located in the middle of the support frame 100 and connected to the outlet of the leaching reactor 120. It is used to separate the leaching liquid and solid waste generated in the leaching reactor 120. Through the filtration action of the first filter 131, solid waste can be removed and a leaching liquid with higher purity can be obtained, ultimately improving the quality and purity of solid calcium carbonate production.

[0029] The mineralization system 140 can be located within the support frame 100 on a side wall away from the feeding system 110, and is used for mineralization reaction using the leaching solution. The second filter 132 can be located in the middle of the support frame 100, connected to the outlet of the mineralization system 140, and is used to separate the solid calcium carbonate produced by the mineralization reaction from the leaching solution. In the mineralization system 140, a mixed gas is introduced to carry out the mineralization reaction. The mineralization slurry produced by the mineralization reaction is then subjected to solid-liquid separation again using the second filter 132, thereby achieving selective leaching of calcium ions and obtaining high-purity solid calcium carbonate. Preferably, the stirring speed in the mineralization system 140 is 50 to 1000 rpm, and the stirring time is 10 to 200 minutes.

[0030] In some optional embodiments, the fly ash mineralization device 10 may further include a first filtrate device 151 and a second filtrate device 152. The first filtrate device 151 may be located between the leaching reactor 120 and the second filter 132, connected to the outlet of the first filter 131, and used to filter the leaching liquid output by the first filter 131. The second filtrate device 152 may be located between the mineralization system 140 and the second filter 132, connected to the outlet of the second filter 132, and used to filter the leaching liquid output by the second filter 132. During operation of the fly ash mineralization device 10, the filtration of the leaching liquid by the first filtrate device 151 and the second filtrate device 152 removes impurities from the leaching liquid, further improving the purity of the obtained solid calcium carbonate.

[0031] In some optional embodiments, the fly ash mineralization device 10 may further include a first cleaning device 161 and a second cleaning device 162. The first cleaning device 161 may be spaced apart on the side of the first filter 131 near the feeding system 110, for storing cleaning liquid, and configured such that the inlet of the first cleaning device 161 is connected to the first filter 131, so that the leaching liquid reacts with the cleaning liquid to generate an extractant. The second cleaning device 162 may be spaced apart on the side of the first filter 131 away from the feeding system 110, for storing cleaning liquid, and configured such that the inlet of the second cleaning device 162 is connected to the second filter 132, so that the leaching liquid reacts with the cleaning liquid to generate an extractant.

[0032] The leaching liquid output from the first filtrate device 151 and the second filtrate device 152 is then cleaned by the cleaning liquid in the first cleaning device 161 and the second cleaning device 162, which can regenerate the leaching agent, thereby reducing the overall process cost of the fly ash mineralization device 10. A return pipeline can also be installed at the output ports of the first filtrate device 151 and the second filtrate device 152 to return the regenerated leaching agent to the leaching reactor 120, allowing for the recycling of the leaching agent and effectively reducing process costs.

[0033] In some alternative embodiments, the mineralization system 140 may include a mineralization reactor 141, which is connected to a first filtrate device 151 and prepares a leachate for a mineralization reaction in the mineralization reactor 141. The calcium-containing leachate reacts with carbon dioxide in the mineralization system 140 to produce solid calcium carbonate.

[0034] Furthermore, the mineralization reactor 141 may include a bubble distributor 142 disposed at the bottom of the mineralization reactor 141 to generate carbon dioxide bubbles, allowing the carbon dioxide bubbles to penetrate the leachate from bottom to top. The bubble distributor 142 enables carbon dioxide to penetrate the leachate layer from bottom to top in the form of continuous microbubbles. The carbon dioxide is absorbed by the high-concentration amino acid solution rich in calcium ions and converted into carbamate, which then reacts with calcium ions in the mixed solution to obtain calcium carbonate crystals. This effectively increases the contact area between carbon dioxide gas and the leachate, thereby increasing the rate of the mineralization reaction in the mineralization system 140.

[0035] In some optional embodiments, the mineralization system 140 may further include a mixing tank 143 and a condenser 144. The mixing tank 143 may be connected to the mineralization reactor 141 to mix the gases required for the mineralization reaction before introducing them into the reactor 141. Those skilled in the art can select a suitable inert gas to mix with carbon dioxide in the mixing tank 143 according to actual process requirements to prevent oxygen or other active substances from reacting with the leachate during the mineralization reaction.

[0036] The condenser 144 can be connected to the mineralization reactor 141 to control the dew point of the gas required for the mineralization reaction. Since the chemical properties of the leachate may be greatly affected by moisture, in the process of the fly ash mineralization unit 10, it is necessary to use the condenser 144 to strictly control the dew point of the gas required for the mineralization reaction in order to improve the output rate of the fly ash mineralization unit 10.

[0037] In some optional embodiments, the fly ash mineralization device 10 may further include multiple sets of liquid transfer pumps and shut-off valves. The liquid transfer pumps and shut-off valves work together to ensure the smooth operation of the entire fly ash mineralization device 10. Those skilled in the art can flexibly set the number and location of the liquid transfer pumps and shut-off valves according to the actual process conditions.

[0038] Furthermore, the fly ash mineralization device 10 may also include multiple liquid flow meters installed in the leaching reactor 120 or the mineralization reactor 141 to monitor the liquid flow rate in each reactor. Operators can closely monitor the process progress using the data measured by the liquid flow meters.

[0039] In some optional embodiments, the fly ash mineralization device 10 may also be provided with multiple cleaning ports and connected to cleaning pipelines, and the fly ash mineralization device 10 may be flushed at fixed intervals to prevent the reactor and device pipelines from being blocked by sediment deposition.

[0040] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

[0041] In the description of this disclosure, it should be understood that the terms "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0042] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Unless otherwise specified, all terms used in the description of this disclosure (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0044] In the description of this disclosure, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

Claims

1. A fly ash mineralization device, characterized in that... include: Supporting framework; The feeding system is installed near one side wall of the support frame and is used to feed fly ash solids and leaching agent into the fly ash mineralization device. The leaching reactor is located within the support frame near the side wall of the feeding system and is configured to be connected to the feeding system so that the fly ash solids and the leaching agent react within the leaching reactor. The first filter is located in the middle of the support frame and is connected to the outlet of the leaching reactor. It is used to separate the leaching liquid and solid waste generated in the leaching reactor. A mineralization system is located within the support frame on a side wall away from the feeding system, and is used to carry out a mineralization reaction using the leachate; The second filter is located in the middle of the support frame and is connected to the outlet of the mineralization system. It is used to separate the solid calcium carbonate generated by the mineralization reaction from the leaching liquid.

2. The fly ash mineralization device according to claim 1, characterized in that, Also includes: The first filtration device is disposed between the leaching reactor and the second filter and is connected to the outlet of the first filter for filtering the leaching liquid output by the first filter. The second filtrate device is located between the mineralization system and the second filter, and is connected to the outlet of the second filter, for filtering the leachate output by the second filter.

3. The fly ash mineralization device according to claim 2, characterized in that, Also includes: A first cleaning device is spaced apart on the side of the first filter near the feeding system, used to store cleaning liquid, and configured such that the inlet of the first cleaning device is connected to the first filter, so that the filtrate reacts with the cleaning liquid to generate the extractant. The second cleaning device is spaced apart from the first filter on the side away from the feeding system. It is used to store the cleaning liquid and is configured such that the inlet of the second cleaning device is connected to the second filter, so that the filtrate reacts with the cleaning liquid to generate the extractant.

4. The fly ash mineralization device according to claim 2, characterized in that, The mineralization system includes: A mineralization reactor is connected to the first filtrate device, and the filtrate prepared therefor undergoes a mineralization reaction in the mineralization reactor.

5. The fly ash mineralization device according to claim 4, characterized in that, The mineralization reactor includes: A bubble distributor, located at the bottom of the mineralization reactor, is used to generate carbon dioxide bubbles so that the carbon dioxide bubbles penetrate the leaching liquid from bottom to top.

6. The fly ash mineralization device according to claim 4, characterized in that, The mineralization system also includes: A gas mixing tank, connected to the mineralization reactor, is used to mix the gases required for the mineralization reaction and then introduce them into the mineralization reactor; A condenser, connected to the mineralization reactor, is used to regulate the dew point of the gas required for the mineralization reaction.

7. The fly ash mineralization device according to claim 1, characterized in that, The feeding system includes: A feeder, located outside the support frame, is used to transport the fly ash solids into the leaching reactor; A mixing device, located within the supporting frame, is used to mix amino acid solids with water to obtain the extractant, and to transport the extractant to the leaching reactor.

8. The fly ash mineralization device according to claim 7, characterized in that, The feeding system also includes: A conveyor is installed between the feeder and the leaching reactor to transport the fly ash solids to the leaching reactor.

9. The fly ash mineralization device according to claim 1, characterized in that, The leaching reactor includes: A stirrer, located at the bottom of the leaching reactor, is used to stir the fly ash solids and the leaching agent.

10. The fly ash mineralization device according to claim 1, characterized in that, Also includes: A pressure sensor, connected to the leaching reactor, is used to measure the internal pressure of the leaching reactor.

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