Carbon neutralization emission reduction capture system

Abstract

A carbon neutralization and emission reduction capture system is characterized in that flue gas of an incineration plant and a coal-fired power plant containing a thermal power plant and fly ash slurry are stirred and dissolved, carbon dioxide in the flue gas is dissolved into water to form carbonic acid, the carbonic acid and lime contained in the fly ash slurry are subjected to a neutralization reaction, and then dehydration separation is carried out; then, a high-efficiency gas-liquid mixer is matched to generate a jet flow and suck flue gas, carbon dioxide is dissolved in the first filtrate to continue a neutralization reaction, and multi-stage circular reaction elutriation is implemented in the dehydration process, so that time and water are saved, emission is reduced, and the flue gas is absorbed to replace a neutralizer, so that the production cost is reduced. Cost and carbon dioxide emission can be reduced, and environmental protection and sustainable operation of enterprises are achieved.

Description

Technical Field

[0001] This invention relates to the field of fly ash washing, filtration and drying technology, and more particularly to a carbon neutralization and emission reduction capture system. Background Technology

[0002] Incinerators and coal-fired power plants, including combined heat and power plants, generate a relatively large amount of fly ash during the combustion of waste or coal. Fly ash contains soluble substances such as potassium, sodium, and chloride ions, as well as insoluble substances such as calcium, silicon, aluminum, and iron, and is therefore classified as hazardous industrial waste.

[0003] Current methods for treating fly ash first involve washing it with water to dissolve soluble substances such as potassium, sodium, and chloride ions, and then using chelating agents to capture heavy metals. The fly ash is then sent to a dewatering machine to separate the filtrate and filter cake. However, this filtrate is strongly alkaline (pH 11-12), so an acidic agent must be added for neutralization, increasing costs and wasting resources. Therefore, how to solve these problems is a pressing research topic for industry players. Summary of the Invention

[0004] The main objective of this invention is to utilize flue gas from incineration plants and coal-fired power plants (including cogeneration plants) to stir and dissolve fly ash slurry, allowing carbon dioxide in the flue gas to dissolve in water to form carbonic acid. The carbonic acid then neutralizes the lime contained in the fly ash slurry. After dehydration and separation, a high-efficiency gas-liquid mixer is used to generate a jet stream and draw in flue gas, allowing carbon dioxide to dissolve in the first filtrate for further neutralization. The dehydration process involves multi-stage cyclic reaction washing to save time, water, and reduce emissions. Furthermore, by using flue gas instead of a neutralizing agent, costs and carbon dioxide emissions can be reduced, achieving environmental protection and sustainable business operations.

[0005] To achieve the above objectives, the carbon neutralization and emission reduction capture system of the present invention includes a fly ash supply device, a flue gas supply device, a first dissolving and stirring tank, a temporary storage and stirring tank, a first dewatering machine, and a first filtrate tank, wherein: the fly ash supply device is used to transport fly ash; the flue gas supply device is used to cool and transport flue gas; the first dissolving and stirring tank is connected to both the fly ash supply device and the flue gas supply device to receive fly ash slurry, flue gas, and a chelating agent for stirring and dissolving, utilizing the carbon dioxide in the flue gas to dissolve in water to form carbonic acid, and allowing the carbonic acid to neutralize the lime contained in the fly ash slurry to form a first fly ash treatment slurry; The temporary storage mixing tank is connected to the first dissolving mixing tank and the flue gas supply device to receive the first fly ash treatment slurry and flue gas for mixing and dissolving. The first dewatering machine is connected to the temporary storage mixing tank to receive the first fly ash treatment slurry for dewatering and separating the first filter cake and the first filtrate. The first filtrate tank receives the first filtrate from the first dewatering machine. The first filtrate tank circulates the first filtrate through the first filtrate tank and the first gas-liquid mixer to generate a jet stream. The first gas-liquid mixer is branched and connected to the flue gas supply device. The first gas-liquid mixer is used to draw in flue gas, allowing carbon dioxide to dissolve in the first filtrate and continue the neutralization reaction.

[0006] In the aforementioned carbon neutrality emission reduction and capture system, the fly ash supply device is indirectly connected to the first dissolving and stirring tank by a stirring and dissolving tank. The stirring and dissolving tank receives fly ash, adds water, stirs and dissolves it into fly ash slurry, and then transports the fly ash slurry into the first dissolving and stirring tank.

[0007] In the aforementioned carbon neutrality and emission reduction capture system, the first filtrate tank branches and delivers the first filtrate into the first dewatering machine, whereby the first filtrate is washed and dissolved to dissolve the lime contained in the first fly ash treatment slurry inside the first dewatering machine.

[0008] In the aforementioned carbon neutrality emission reduction and capture system, the first dewatering machine is sequentially connected to a second dissolving and stirring tank and a second dewatering machine. The second dissolving and stirring tank is branched off to a flue gas supply device to receive flue gas and the first filter cake, add water, stir and dissolve, and neutralize to form a second fly ash treatment slurry. The second dewatering machine receives the second fly ash treatment slurry and dewaters it to separate the second filter cake and the second filtrate.

[0009] The aforementioned carbon neutralization and emission reduction capture system further includes a second filtrate tank and a second gas-liquid mixer. The second filtrate tank receives the second filtrate from the second dehydrator. The second filtrate tank circulates the second filtrate through the second filtrate tank and the second gas-liquid mixer to generate a jet stream. The second gas-liquid mixer is branched and connected to a flue gas supply device. Flue gas is drawn in by the second gas-liquid mixer, allowing carbon dioxide to dissolve in the second filtrate and continue the neutralization reaction.

[0010] In the aforementioned carbon neutrality emission reduction and capture system, the fly ash supply device is indirectly connected to the first dissolving and stirring tank by a stirring and dissolving tank. The stirring and dissolving tank receives fly ash, adds water, stirs and dissolves it into fly ash slurry, and then transports the fly ash slurry into the first dissolving and stirring tank. Meanwhile, the second filtrate tank branches and transports the second filtrate into the stirring and dissolving tank.

[0011] In the aforementioned carbon neutrality and emission reduction capture system, the second filtrate tank branches and delivers the second filtrate into the second dewatering machine, whereby the second filtrate is used to wash and dissolve the lime contained in the second fly ash treatment slurry inside the second dewatering machine. Attached Figure Description

[0012] Figure 1 This is a block diagram of the carbon neutrality and emission reduction capture system of the first embodiment of the present invention.

[0013] Figure 2 This is a block diagram of the carbon neutrality and emission reduction capture system of the second embodiment of the present invention.

[0014] Explanation of reference numerals in the attached figures

[0015] 1. Fly ash supply device

[0016] 2. Flue gas supply device

[0017] 3. Stirring and dissolving tank

[0018] 4. First Dissolving and Stirring Tank

[0019] 5. Chelating agent tank

[0020] 6. Temporary storage mixing tank

[0021] 7. First dehydrator

[0022] 8. First filtrate tank

[0023] 9. First gas-liquid mixer

[0024] 10. Recycling tank

[0025] 11. Discharge of wastewater

[0026] 12. Second Dissolving and Stirring Tank

[0027] 13. Second dehydrator

[0028] 14. Second filtrate tank

[0029] 15. Second gas-liquid mixer

[0030] 16. Packaging of filter cake. Detailed Implementation

[0031] To achieve the above objectives, the present invention employs technical means and achieves its effects, and feasible embodiments are provided below, along with accompanying drawings:

[0032] First, please refer to Figure 1 The first embodiment shown in the figure clearly illustrates that the carbon neutrality emission reduction and capture system of the present invention includes a fly ash supply device 1, a flue gas supply device 2, a stirring and dissolving tank 3, a first dissolving and stirring tank 4, a chelating agent tank 5, a temporary storage and stirring tank 6, a first dehydrator 7, a first filtrate tank 8, a first gas-liquid mixer 9, and a recovery water tank 10, wherein:

[0033] The fly ash supply device 1 uses a screw conveyor and a metering device (not shown) to meter and transport fly ash.

[0034] The flue gas supply device 2 uses flue gas emitted from the chimneys of incinerators and coal-fired power plants, including combined heat and power plants. The flue gas is cooled by a cooling device and transported by a high-temperature corrosion-resistant blower (not shown).

[0035] The stirring and dissolving tank 3 is connected between the fly ash supply device 1 and the first dissolving and stirring tank 4. The stirring and dissolving tank 3 receives fly ash, adds water, stirs and dissolves it into fly ash slurry, and then transports the fly ash slurry into the first dissolving and stirring tank 4.

[0036] The first dissolving and stirring tank 4 is connected to the stirring and dissolving tank 3, the flue gas supply device 2, and the chelating agent tank 5 respectively, so as to receive fly ash slurry, flue gas and chelating agent for stirring and dissolving. The carbon dioxide in the flue gas is dissolved into water to become carbonic acid by using a jet-type aeration nozzle, and the carbonic acid is neutralized with the lime contained in the fly ash slurry to form the first fly ash treatment slurry.

[0037] The temporary storage mixing tank 6 is connected to the first dissolving mixing tank 4 and the flue gas supply device 2 respectively, so as to receive the first fly ash treatment slurry and flue gas for mixing and dissolving, allowing carbon dioxide and lime contained in the first fly ash treatment slurry to continue to undergo neutralization reaction.

[0038] The first dewatering machine 7 is connected to the temporary storage and stirring tank 6 to receive the first fly ash treatment slurry and dewater it to separate the first filter cake and the first filtrate.

[0039] The first filtrate tank 8 receives the first filtrate from the first dewatering machine 7. The first filtrate tank 8 then circulates the first filtrate through the first gas-liquid mixer 9 to generate a jet stream. The first gas-liquid mixer 9 is branched into the flue gas supply device 2 via a Venturi tube, continuously drawing in flue gas to dissolve carbon dioxide in the first filtrate for further neutralization. Furthermore, the first filtrate tank 8 can control the branching of the first filtrate into the first dewatering machine 7, allowing the first filtrate to wash and dissolve the lime contained in the first fly ash treatment slurry inside the first dewatering machine 7, continuing the neutralization reaction. The first filtrate tank 8 can also control the flow of the first filtrate into the recovery water tank 10 for supply to the stirring and dissolving tank 3. Moreover, when the neutralization reaction of the first filtrate reaches the wastewater discharge standard, the first filtrate tank 8 can also discharge wastewater 11. Thus, the carbon neutrality emission reduction capture system can meet wastewater discharge standards during operation. Moreover, by using flue gas absorption instead of neutralizing agents, it can reduce costs and carbon dioxide emissions. Furthermore, the system process can reduce water consumption, achieving environmental protection and sustainable business operations.

[0040] Please see Figure 2 The second embodiment shown in the figure clearly shows that the main difference between the second embodiment and the first embodiment is that the first dewatering machine 7 is sequentially connected to the second dissolving and stirring tank 12 and the second dewatering machine 13. The second dissolving and stirring tank 12 is branched to the flue gas supply device 2. The first filter cake is first ground and crushed. The second dissolving and stirring tank 12 then receives flue gas and the crushed filter cake, adds water, and stirs and dissolves it, allowing carbon dioxide and lime to continue neutralizing and reacting to form the second fly ash treatment slurry. Then, the second dewatering machine 13 receives the second fly ash treatment slurry and dehydrates it to separate the second filter cake and the second filtrate. The second filtrate tank 14 receives the second filtrate from the second dewatering machine 13. The second filtrate tank 14 then circulates the second filtrate through the second filtrate tank 14 and the second gas-liquid mixer 15 to generate a jet stream. The second gas-liquid mixer 15 is branched to the flue gas supply device 2, and the second gas-liquid mixer 15 continuously draws in flue gas, allowing carbon dioxide to dissolve in the second filtrate and continue neutralizing and reacting. Furthermore, the second filtrate tank 14 can control the branching of the second filtrate into the second dewatering machine 13, allowing the second filtrate to wash and dissolve the lime contained in the second fly ash treatment slurry inside the second dewatering machine 13, in order to continue the neutralization reaction. The second filtrate tank 14 can also control the branching of the second filtrate into the recovery water tank 10 to supply the stirring and dissolving tank 3. The second filter cake can be packaged using a space bag 16. Thus, during operation, the carbon neutrality and emission reduction capture system implements multi-stage circulating reaction washing of the first and second filtrates during the dewatering process, saving time, water, and reducing emissions, meeting wastewater discharge standards. Moreover, by using flue gas absorption instead of a neutralizing agent, costs and carbon dioxide emissions are reduced, and the system process further reduces water consumption, achieving environmental protection and sustainable business operations.

[0041] The embodiments described above are only for the purpose of illustrating the present invention and are not intended to limit it. Various simple changes and modifications that can be made by those skilled in the art without departing from the spirit and scope of the present invention should still be included in the claims of this application.

Claims

1. A carbon neutral emission reduction capture system, comprising a fly ash supply device, a flue gas supply device, a first dissolving agitator tank, a temporary storage agitator tank, a first dewatering machine, and a first filtrate tank, wherein: the fly ash supply device is configured to deliver fly ash; the flue gas supply device is configured to deliver flue gas; the first dissolving agitator tank is connected to the fly ash supply device and the flue gas supply device to receive fly ash slurry, the flue gas, and a chelating agent to be agitated and dissolved, to dissolve carbon dioxide in the flue gas into carbonic acid in water, and to neutralize the carbonic acid with lime contained in the fly ash slurry to form a first fly ash treatment slurry; the temporary storage agitator tank is connected to the first dissolving agitator tank and the flue gas supply device to receive the first fly ash treatment slurry and the flue gas to be agitated and dissolved; the first dewatering machine is connected to the temporary storage agitator tank to receive the first fly ash treatment slurry to be separated into a first filter cake and a first filtrate; the first filtrate tank receives the first filtrate from the first dewatering machine, and the first filtrate tank delivers the first filtrate to be circulated through the first filtrate tank and a first gas-liquid mixer to generate a jet stream, and the first gas-liquid mixer is connected to the flue gas supply device to draw the flue gas into the first gas-liquid mixer to dissolve carbon dioxide in the first filtrate to continue the neutralization reaction.

2. The carbon neutral emission reduction capture system of claim 1, wherein a dissolving agitator tank is connected between the fly ash supply device and the first dissolving agitator tank, and the dissolving agitator tank receives the fly ash and water to be agitated and dissolved into the fly ash slurry, and the dissolving agitator tank delivers the fly ash slurry into the first dissolving agitator tank.

3. The carbon neutral emission reduction capture system of claim 1, wherein the first filtrate tank delivers the first filtrate into the first dewatering machine to leach and dissolve the lime contained in the first fly ash treatment slurry inside the first dewatering machine.

4. The carbon neutral emission reduction capture system of claim 1, wherein the first dewatering machine is connected in sequence to a second dissolving agitator tank and a second dewatering machine, the second dissolving agitator tank is connected to the flue gas supply device to receive the flue gas and the first filter cake and water to be agitated and dissolved, and to neutralize the second fly ash treatment slurry, and the second dewatering machine receives the second fly ash treatment slurry to be separated into a second filter cake and a second filtrate.

5. The carbon neutral emission reduction capture system of claim 4, further comprising a second filtrate tank and a second gas-liquid mixer, the second filtrate tank receives the second filtrate from the second dewatering machine, and the second filtrate tank delivers the second filtrate to be circulated through the second filtrate tank and the second gas-liquid mixer to generate a jet stream, and the second gas-liquid mixer is connected to the flue gas supply device to draw the flue gas into the second gas-liquid mixer to dissolve carbon dioxide in the second filtrate to continue the neutralization reaction.

6. The carbon neutral emission reduction capture system of claim 5, wherein a stirring dissolving tank is connected between the fly ash supply device and the first dissolving stirring tank, the stirring dissolving tank receives the fly ash and water to be stirred and dissolved into the fly ash slurry, and the fly ash slurry is transported into the first dissolving stirring tank, and the second filtrate tank diverges the second filtrate into the stirring dissolving tank.

7. The carbon neutral emission reduction capture system of claim 5, wherein the second filtrate tank diverges the second filtrate into the second dewatering machine, and the second filtrate is used to wash and dissolve the lime contained in the second fly ash treatment slurry inside the second dewatering machine.

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