Wet scrubbing tower that dissolves carbon dioxide in an alkaline solution

Abstract

A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution includes: a carbon dioxide emission device; a wet scrubbing tower connected to the carbon dioxide emission device via an exhaust gas guide pipe; the wet scrubbing tower is used to react the intake exhaust gas with the input alkaline solution, thereby dissolving the carbon dioxide in the exhaust gas into the alkaline solution; an absorbent storage tank containing the alkaline solution; the absorbent storage tank having an absorbent outlet and an absorbent inlet; the wet scrubbing tower having an exhaust gas inlet connected to the exhaust gas guide pipe, the exhaust gas inlet being used to receive carbon dioxide from the solution. The system includes: exhaust gas from the emission equipment; an alkaline solution inlet connected to the absorbent outlet of the absorbent storage tank via an alkaline solution inlet pipe; the alkaline solution inlet receiving the alkaline solution from the absorbent storage tank; an alkaline solution outlet connected to the absorbent inlet of the absorbent storage tank via an alkaline solution outlet pipe; and the alkaline solution outlet discharging the reacted alkaline solution back to the absorbent storage tank; and a packed tower zone for reacting the exhaust gas from the wet scrubbing tower with the input alkaline solution, thereby dissolving carbon dioxide in the exhaust gas into the alkaline solution.

Description

Technical Field

[0001] The present invention relates to a wet scrubber, in particular to a wet scrubber for dissolving carbon dioxide into an alkaline solution. Prior Art Carbon dioxide is the main greenhouse gas. In addition to natural production, most of the carbon dioxide comes from industrial emissions. Since the beginning of the Industrial Revolution, the concentration of carbon dioxide in the atmosphere has continued to rise. Carbon dioxide absorbs infrared rays, which cannot penetrate the atmosphere, so heat is constantly retained on the surface of the earth, causing a greenhouse effect, leading to melting of ice in the Arctic and Antarctic, rising sea levels, and global climate change. The most serious problem is that industrial operations generate a large amount of waste gas, such as factory boilers, incinerators, natural gas, coal, etc. These devices generate a large amount of waste gas after internal combustion, and the waste gas concentration is quite high. These waste gases are often directly discharged to the outside through the chimneys of the equipment. However, if these waste gases are directly discharged into nature without being treated, global warming, which has been quite serious in recent years, will develop into an irreversible situation. Therefore, carbon reduction has been a very important topic in recent years. With the progress of the times, the government has also formulated many relevant laws and regulations to limit the carbon emissions of enterprises. However, these methods are nothing more than installing air pollution treatment equipment or fining enterprises that emit waste gas. But in fact, the popularity of installing air pollution treatment equipment is not high and the cost is relatively high. Therefore, many factories still secretly discharge waste gas at night. These methods are only temporary solutions and not fundamental solutions. Therefore, a large amount of waste gas is still discharged into our nature every year to cause damage. Therefore, this case hopes to propose a new wet scrubber that dissolves carbon dioxide into an alkaline solution to solve the above-mentioned defects in the prior art. Summary of the invention Therefore, the purpose of the present invention is to solve the above-mentioned problems in the conventional technology. The present invention proposes a wet scrubber that dissolves carbon dioxide into an alkaline solution. The wet scrubber uses a guide pipeline to introduce the exhaust gas of the carbon dioxide emission equipment and the alkaline liquid in the absorption liquid storage tank into the wet scrubber, so that the carbon dioxide in the exhaust gas is dissolved in the alkaline liquid. Therefore, the content of carbon dioxide in the exhaust gas can be reduced, and a large amount of carbon dioxide will not be discharged into the atmosphere to cause environmental damage. It can not only reduce the effect of the greenhouse effect, but also slow down the rate of global warming, thereby protecting our natural environment. In order to achieve the above-mentioned purpose, the present invention proposes a wet scrubber for dissolving carbon dioxide into an alkaline solution, comprising: a carbon dioxide emission device (100), which is an industrial device that emits a large amount of waste gas containing carbon dioxide during use, and the waste gas is discharged to the outside through the carbon dioxide emission device; a wet scrubber (10) connected to the carbon dioxide emission device via a waste gas guide pipe; the wet scrubber is used to react the inhaled waste gas with the input alkaline solution, so that the carbon dioxide in the waste gas is dissolved in the alkaline solution; an absorption liquid storage tank (20) containing the alkaline solution; the absorption liquid storage tank has an absorption liquid outlet and an absorption liquid inlet; the wet scrubber (10) has a waste gas inlet (12), a waste gas outlet (14), an alkaline solution inlet (16), an alkaline solution outlet (18) and a filling tower area (11); wherein the waste gas inlet is connected to the waste gas guide pipe, the The waste gas inlet is used to receive the waste gas from the carbon dioxide emission device; the waste gas outlet is used to discharge the waste gas remaining after the reaction; wherein the waste gas outlet can be connected to a waste gas discharge pipeline; the alkaline solution inlet is connected to the absorption liquid outlet of the absorption liquid storage tank via an alkaline solution introduction pipe; the alkaline solution inlet is used to receive the alkaline solution from the absorption liquid storage tank; the alkaline solution outlet is connected to the absorption liquid inlet of the absorption liquid storage tank via an alkaline solution outlet pipe; the alkaline solution outlet is used to discharge the alkaline solution after the reaction and transport it to the absorption liquid storage tank through the alkaline solution outlet pipe; the filling tower area is located above the waste gas inlet, and the filling tower area is used to react the waste gas passing through the wet scrubber with the input alkaline solution, so that the carbon dioxide in the waste gas is dissolved in the alkaline solution; a pH value meter is located in the absorption liquid storage tank, and is used to measure the pH value of the alkaline solution in the absorption liquid storage tank. The features and advantages of the present invention can be further understood from the following description, and please refer to the accompanying drawings when reading. Simple diagram description FIG1 shows the structural diagram of this case. FIG. 2 shows an embodiment of the present invention. FIG. 3 is a schematic diagram showing the exhaust gas flow direction of the present invention. FIG. 4 is a schematic diagram showing the exhaust gas flow direction according to an embodiment of the present invention. FIG. 5 is a schematic diagram showing the gas retention structure in the packed tower area of ​​the present invention. FIG. 6 is a schematic diagram showing the flow direction of the alkaline liquid in the present invention. Implementation The structural composition of the present invention, as well as the effects and advantages it can produce, are described in detail below with reference to the drawings and a preferred embodiment of the present invention. The structure of this case is to capture carbon dioxide in the exhaust gas before it is discharged into the atmosphere, and then treat the alkaline solution dissolved in carbon dioxide and reuse it. Please refer to Figures 1 to 6, which show the wet scrubber for dissolving carbon dioxide into an alkaline solution according to the present invention, comprising the following elements: A carbon dioxide emission device 100 is an industrial device that emits a large amount of waste gas containing carbon dioxide during use, such as factory boilers, incineration plants, power plants, natural gas burning equipment, coal burning equipment, etc. These devices will generate a large amount of waste gas after internal combustion, and the waste gas concentration is quite high. These waste gases will be discharged to the outside through the chimney of the carbon dioxide emission device 100. However, if these waste gases are directly discharged into nature without being treated, they will cause considerable harm to our natural environment. A wet scrubber 10 is connected to the carbon dioxide emission device 100 via an exhaust gas guide pipe 15. The wet scrubber 10 is used to react the inhaled exhaust gas with the input alkaline solution, so that the carbon dioxide in the exhaust gas is dissolved in the alkaline solution. An absorption liquid storage tank 20 contains the alkaline solution 22. The absorption liquid storage tank 20 has an absorption liquid outlet 24 and an absorption liquid inlet 26. The wet scrubber 10 has an exhaust gas inlet 12, an exhaust gas outlet 14, an alkaline solution inlet 16, an alkaline solution outlet 18 and a packed tower section 11. The positions of the four inlets and outlets shown in the figure are not intended to limit the present invention, and their positions can be determined as needed in actual use. The exhaust gas inlet 12 is connected to the exhaust gas guide pipe 15, and the exhaust gas inlet 12 is used to receive the exhaust gas from the carbon dioxide emission device 100. The waste gas outlet 14 is used to discharge the waste gas remaining after the reaction. The waste gas outlet 14 can be connected to a waste gas discharge pipeline 17, as shown in FIG1 . In the embodiment shown in Fig. 2, the exhaust gas discharge pipeline 17 is connected to the exhaust gas guide pipe 15. The arrow direction of the three-way valve in Fig. 2 and Fig. 4 does not have any directional meaning, and the gas direction can be adjusted according to the application method. The alkaline solution inlet 16 is connected to the absorption liquid outlet 24 of the absorption liquid storage tank 20 via an alkaline solution introduction pipe 25 ; the alkaline solution inlet 16 is used to receive the alkaline solution 22 from the absorption liquid storage tank 20 . The alkaline solution outlet 18 is connected to the absorption liquid inlet 26 of the absorption liquid storage tank 20 via an alkaline solution outlet pipe 27. The alkaline solution outlet 18 is used to discharge the alkaline solution 22 after the reaction and transport it to the absorption liquid storage tank 20 via the alkaline solution outlet pipe 27. The packed tower section 11 is used to react the waste gas passing through the wet scrubbing tower 10 with the input alkaline solution 22 , so that the carbon dioxide in the waste gas is dissolved in the alkaline solution 22 . The reaction of the packed tower zone 11 can be carried out in a variety of ways, which are described as follows: The first method is to pass the alkaline solution 22 through the exhaust gas floating upward from the bottom in the form of a water curtain or high-pressure water mist, so that the carbon dioxide in the exhaust gas dissolves into the alkaline solution 22. This structure is well known in the art and its details are not repeated here. The second method is to pressurize the exhaust gas to a high pressure and pass it through the alkaline solution 22 so that the carbon dioxide in the exhaust gas dissolves into the alkaline solution 22. This structure is well known in the art and its details are not repeated here. The third method is to form a gas retention structure 111 (as shown in FIG. 5 ) in the packed tower area 11, so that the carbon dioxide in the exhaust gas and the alkaline solution 22 must spend a longer time to pass through the gas retention structure 111, so that the two can fully react, thereby improving the overall reaction efficiency. The gas retention structure 111 has many different forms, and the gas retention structure 111 shown in the figure is only used as an example, which is not used to limit the scope of this case. These are all familiar in the art, and the details will not be repeated here. An absorption liquid pump 30 is used to drive and transport the alkaline solution 22 so that the alkaline solution 22 in the absorption liquid storage tank 20 flows into the wet scrubber 10 or flows out of the wet scrubber 10. The absorption liquid pump 30 is located on the alkaline solution inlet pipe 25 or the alkaline solution outlet pipe 27. As shown in Figure 2, this case also includes: An absorption liquid flow meter 32 is disposed at the alkali solution introduction pipe 25 for measuring the flow rate of the alkaline solution 22 in the alkali solution introduction pipe 25 . A pH value measuring device 34 is located in the absorption liquid storage tank 20 and is used to measure the pH value of the alkaline solution 22 in the absorption liquid storage tank 20 . The main reaction of this case is that when the waste gas is discharged from the carbon dioxide emission device 100 and then passes through the chimney of the carbon dioxide emission device 100, it will flow through the waste gas guide pipe 15 and be guided to the waste gas inlet 12 of the wet scrubber 10, and enter the wet scrubber 10. The alkaline solution 22 in the absorption liquid storage tank 20 will enter the alkaline solution introduction pipe 25 through the absorption liquid pump 30, and then enter the wet scrubber 10 from the alkaline solution inlet 16, and then the carbon dioxide in the waste gas and the alkaline solution 22 enter the packed tower area 11 for reaction. The flow direction of the waste gas is shown by the dotted line in Figure 3. After the reaction, the carbon dioxide in the exhaust gas will dissolve in the alkaline solution 22, and the alkaline solution 22 containing carbon dioxide will flow back to the absorption liquid inlet 26 of the absorption liquid storage tank 20 through the alkaline solution outlet 18 and the alkaline solution outlet pipe 27, and thus be introduced into the absorption liquid storage tank 20. The flow direction of the alkaline solution 22 is shown by the dotted line in FIG6 . At this time, the pH value measuring device 34 measures the pH value of the alkaline solution 22 in the absorption liquid storage tank 20. When the pH value meets the setting, the absorption liquid pump 30 stops operating, thereby stopping the reaction in the entire wet scrubber 10, and the alkaline solution 22 can be taken out and other treatment steps can be performed as needed. If the pH value of the alkaline solution 22 measured by the pH value measuring device 34 is still greater than the setting value, the absorption liquid pump 30 continues to function so that the alkaline solution 22 can continue to absorb carbon dioxide in the exhaust gas in the wet scrubber 10. As shown in FIG. 4 , a carbon dioxide content measuring device 40 can also be installed on the exhaust gas discharge pipeline 17 in the present case to measure the carbon dioxide content of the exhaust gas in the exhaust gas discharge pipeline 17 . When the measured carbon dioxide content is higher than the set value, the exhaust gas can be guided to the exhaust gas guide pipe 15 through the exhaust gas discharge pipeline 17 , so as to re-enter the exhaust gas treatment cycle and continue the reaction of the alkaline solution 22 absorbing carbon dioxide. The exhaust gas flow direction is shown by the dotted line in FIG. 4 . In this case, a suitable pump body can be added to each gas or liquid flow channel such as the guide pipe, the outlet pipe, the inlet pipe, etc. to guide the flow of the fluid. This is within the scope of the present invention. The advantage of this case is that the exhaust gas from the carbon dioxide emission equipment and the alkaline liquid in the absorption liquid storage tank are introduced into the wet scrubber through a guide pipeline, so that the carbon dioxide in the exhaust gas dissolves in the alkaline liquid, thereby reducing the content of carbon dioxide in the exhaust gas, and no large amount of carbon dioxide is discharged into the atmosphere to cause environmental harm. It can not only reduce the effect of the greenhouse effect, but also slow down the rate of global warming, thereby protecting our natural environment. In summary, the humanized and considerate design of this case is quite in line with actual needs. Its specific improvement of existing deficiencies is obviously a breakthrough in progress compared to the conventional technology, and it does have an improvement in efficacy, which is not easy to achieve. This case has not been published or disclosed in domestic and foreign literature and markets, and has complied with the provisions of the Patent Law. The above detailed description is a specific description of a feasible embodiment of the present invention, but the embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the technical spirit of the present invention should be included in the patent scope of this case. 10: Wet scrubber 11: Filling tower area 12: Exhaust gas inlet 14: Exhaust gas outlet 15: Exhaust gas guide pipe 16: Alkaline solution inlet 17: Exhaust gas discharge pipe 18: Alkaline solution outlet 20: Absorption liquid storage tank 22: Alkaline solution 24: Absorption liquid outlet 25: Alkali solution inlet pipe 26: Absorption liquid inlet 27: Alkali solution outlet pipe 30: Absorption liquid pump 32: Absorption liquid flow meter 34: PH value meter 40: Carbon dioxide content meter 100: Carbon dioxide emission equipment 111: Gas retention structure

Claims

1. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution, comprising: a carbon dioxide emission device, which is an industrial device that emits large amounts of waste gas containing carbon dioxide during operation, and the waste gas is discharged to the outside through the carbon dioxide emission device; a wet scrubbing tower connected to the carbon dioxide emission device via a waste gas guide pipe; the wet scrubbing tower is used to react the inhaled waste gas with the input alkaline solution, so that the carbon dioxide in the waste gas dissolves in the alkaline solution; an absorbent storage tank containing the alkaline solution; the absorbent storage tank having an absorbent outlet and an absorbent inlet; the wet scrubbing tower having a waste gas inlet, a waste gas outlet, an alkaline solution inlet, an alkaline solution outlet, and an alkaline solution outlet. A packed tower section; wherein the exhaust gas inlet is connected to the exhaust gas guide pipe, and the exhaust gas inlet is used to receive exhaust gas from the carbon dioxide emission equipment; the exhaust gas outlet is used to discharge the remaining exhaust gas after the reaction; wherein the exhaust gas outlet is connected to an exhaust gas discharge pipeline; the alkaline solution inlet is connected to the absorbent outlet of the absorbent storage tank via an alkaline solution inlet pipe; the alkaline solution inlet is used to receive the alkaline solution from the absorbent storage tank; the alkaline solution outlet is connected to the absorbent inlet of the absorbent storage tank via an alkaline solution outlet pipe; the alkaline solution outlet is used to discharge the alkaline solution after the reaction, and transport it to the absorbent storage tank via the alkaline solution outlet pipe; the packed tower section is used to process the waste gas that has passed through the wet scrubbing tower. The waste gas reacts with the input alkaline solution, causing the carbon dioxide in the waste gas to dissolve in the alkaline solution. A pH meter is located in the absorbent storage tank to measure the pH value of the alkaline solution in the absorbent storage tank. When the waste gas is discharged from the carbon dioxide emission device, it flows through the waste gas guide pipe and is guided to the waste gas inlet of the wet scrubber, entering the wet scrubber. The alkaline solution in the absorbent storage tank is pumped by an absorbent pump into the alkaline solution inlet pipe, and then enters the wet scrubber from the alkaline solution inlet. The carbon dioxide in the waste gas and the alkaline solution then enter the packed tower zone to react. After the reaction, the carbon dioxide in the waste gas will... The alkaline solution containing carbon dioxide, dissolved in the alkaline solution, flows back to the absorbent inlet of the absorbent storage tank through the alkaline solution outlet and the alkaline solution outlet pipe, thus entering the absorbent storage tank. At this time, the pH meter measures the pH value of the alkaline solution in the absorbent storage tank. When the pH value meets the set value, the operation of the absorbent pump is stopped, thus stopping the reaction in the entire wet scrubbing tower. The alkaline solution can be removed and further processed as needed. If the pH value of the alkaline solution measured by the pH meter is still greater than the set value, the absorbent pump continues to operate so that the alkaline solution can continue to absorb carbon dioxide from the waste gas in the wet scrubbing tower.

2. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1, wherein in the packed tower zone, the alkaline solution is passed through the exhaust gas that is dispersed from bottom to top in the form of a water curtain or high-pressure water mist, so that the carbon dioxide in the exhaust gas dissolves in the alkaline solution.

3. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1, wherein in the packed tower zone, exhaust gas is pressurized to a high pressure and passed through the alkaline solution, thereby dissolving carbon dioxide in the exhaust gas into the alkaline solution.

4. The wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1, wherein a gas retention structure is formed in the packed tower zone, so that the carbon dioxide in the waste gas and the alkaline solution must take a longer time to pass through the gas retention structure, thus allowing them to react fully and thereby improving the overall reaction efficiency.

5. The wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1 further includes an absorbent pump for driving the delivery of the alkaline solution, so that the alkaline solution in the absorbent storage tank flows into or out of the wet scrubbing tower.

6. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 5, wherein the absorbent pump is located on the alkaline inlet pipe or the alkaline outlet pipe.

7. The wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1 further includes an absorbent flow meter disposed at the alkaline inlet pipe for measuring the flow rate of the alkaline solution in the alkaline inlet pipe.

8. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 1, wherein a carbon dioxide content measuring device is installed on the exhaust gas discharge pipe to measure the carbon dioxide content of the exhaust gas in the exhaust gas discharge pipe.

9. A wet scrubbing tower for dissolving carbon dioxide in an alkaline solution as described in claim 8, wherein when the carbon dioxide content measured by the carbon dioxide content measuring device is higher than a set value, the waste gas is guided through the waste gas discharge pipe to the waste gas guide pipe, thus re-entering the waste gas treatment cycle to continue the reaction of the alkaline solution absorbing carbon dioxide.

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