Gas-liquid counterflow contact purification tower

Abstract

This utility model discloses a gas-liquid countercurrent contact purification tower, relating to the field of waste gas treatment. The gas-liquid countercurrent contact purification tower includes a transparent tower body, with a gas supply pipe fixedly connected to the lower end of one side of the transparent tower body and an exhaust pipe fixedly connected to the upper end of the transparent tower body. It also includes a spray pipe fixedly connected to the upper interior of the transparent tower body. This utility model adopts a countercurrent mode with CO2-containing waste gas entering from the bottom and algal liquid sprayed from the top, combined with a multi-layer packing layer containing immobilized algae, significantly extending the gas-liquid contact time, enhancing mass transfer, and solving the problems of short contact time and low carbon fixation efficiency between microalgae and polluting gases. It efficiently purifies waste gas. A circulating pump at the bottom of the tower stabilizes the algal liquid concentration, ensuring continuous and stable contact. The cylindrical structure combined with multi-layer packing takes up little space and is suitable for scenarios with limited space. The transparent tower body allows for direct monitoring of the internal gas-liquid and algal liquid states, facilitating timely handling of anomalies and improving the convenience and accuracy of operation and management.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically, it relates to a gas-liquid countercurrent contact purification tower. Background Technology

[0002] In industrial production and environmental governance, the treatment of waste gas containing pollutants such as carbon dioxide is an important link. Microalgae carbon fixation has become a research hotspot due to its combination of environmental benefits and resource potential. Gas-liquid contact purification equipment is a key carrier for realizing microalgae carbon fixation. It creates a gas-liquid interactive environment to allow microalgae to fully contact the waste gas and fix carbon dioxide through photosynthesis.

[0003] However, traditional purification towers have a short gas-liquid contact time during use. Although they have counter-current design and basic packing, the contact between microalgae and polluting gases is still insufficient. Due to the limitations of the flow field distribution and packing structure within the tower, the mass transfer efficiency is limited, making it difficult to improve carbon fixation efficiency. In addition, the equipment is not stable and easy to maintain. The algae circulation is easily affected by pipeline blockage and pump failure. Furthermore, there is a lack of intuitive monitoring methods, making it difficult to detect abnormalities in a timely manner. Therefore, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a gas-liquid countercurrent contact purification tower that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a gas-liquid countercurrent contact purification tower, including a transparent tower body, a gas supply pipe fixedly connected to the lower end of one side of the transparent tower body, and an exhaust pipe fixedly connected to the upper end of the transparent tower body, further including: a spray pipe fixedly connected to the upper part of the interior of the transparent tower body; a packing layer installed in the transparent tower body through a support ring, and multiple layers arranged from top to bottom, the packing layer being located between the gas supply pipe and the spray pipe; a circulating pump located at the bottom of the transparent tower body, the liquid suction end of the circulating pump being connected to the liquid discharge port at the bottom of the transparent tower body through a first connecting pipe, and the liquid discharge end of the circulating pump being connected to the liquid inlet of the spray pipe through a second connecting pipe; and a demister fixedly installed inside the transparent tower body, located between the spray pipe and the exhaust pipe.

[0006] Furthermore, it also includes a support frame, on which the transparent tower body is vertically mounted, and the circulating pump is fixedly mounted.

[0007] To further improve the stability of the purification tower, the four corners at the bottom of the support are all connected with support legs by threads.

[0008] To reduce the number of spray pipes 106 used and lower equipment manufacturing costs and installation complexity, multiple openings are equidistantly provided on the lower side of the spray pipe, and a rotating spray head is connected to each opening.

[0009] To facilitate easier replacement of the packing layer, the transparent tower body has a horizontal opening near the support ring, and an annular protrusion is provided inside the transparent tower body on the lower side of the support ring, with the support ring placed on the annular protrusion.

[0010] To facilitate preliminary treatment of solid impurities in the exhaust gas, a conical liquid storage tank is further fixedly connected to the inside of the transparent tower near the gas transmission pipe via a support rod. The outlet of the gas transmission pipe is connected to the inlet of the conical liquid storage tank. A valve pipe is fixedly connected to one side of the conical liquid storage tank, and a one-way valve is installed at the liquid outlet at the upper end of the conical liquid storage tank.

[0011] To facilitate the automatic and continuous replenishment of nitrogen, phosphorus, and other nutrients required for the growth of microalgae in the tower, the liquid stored in the conical storage tank is a microalgae nutrient solution.

[0012] To further facilitate maintaining the exhaust gas temperature within the optimal temperature range for microalgae growth, a waterproof electric heater is fixedly installed at the bottom of the conical liquid storage tank, with the heating rod of the electric heater located inside the conical liquid storage tank.

[0013] After adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: This utility model adopts a countercurrent mode with CO2-containing waste gas entering from the bottom and algal liquid spraying from the top, combined with a multi-layer packing layer with immobilized algae, which greatly extends the gas-liquid contact time, enhances mass transfer, solves the problem of short contact between microalgae and polluting gas and low carbon fixation efficiency, and efficiently purifies waste gas. The bottom circulation pump stabilizes the algal liquid concentration, ensuring continuous and stable contact. The demister recovers moisture, combining environmental protection and economic value. The support frame provides stable support, reduces equipment operation risk, and ensures long-term reliable operation. The cylindrical structure with multi-layer packing takes up little space and is suitable for scenarios with limited space. The transparent tower body allows for intuitive monitoring of the internal gas-liquid and algal liquid status, facilitating timely handling of abnormalities and improving the convenience and accuracy of operation and management. From multiple dimensions such as efficiency, stability, space, and operation and maintenance, it helps carbon fixation and waste gas purification.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the transparent tower body of this utility model. Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the internal structure of the transparent tower body of this utility model. Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the structure of the bracket and legs in this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the conical liquid storage tank of this utility model.

[0021] In the diagram: 1. Transparent tower body; 101. Gas delivery pipe; 102. Exhaust pipe; 103. Packing layer; 104. Support ring; 105. Annular protrusion; 106. Spray pipe; 107. Rotary spray head; 108. Circulation pump; 109. First connecting pipe; 1010. Second connecting pipe; 1011. Demister; 2. Support frame; 201. Support leg; 3. Conical liquid storage tank; 301. Valve pipe; 302. Electric heater. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] Example 1:

[0024] Reference Figures 1-5 The gas-liquid countercurrent contact purification tower includes a transparent tower body 1, with a gas supply pipe 101 fixedly connected to the lower end of one side of the transparent tower body 1 and an exhaust pipe 102 fixedly connected to the upper end of the transparent tower body 1. It also includes: a spray pipe 106 fixedly connected to the upper interior of the transparent tower body 1; a packing layer 103 installed inside the transparent tower body 1 via a support ring 104, with multiple layers arranged from top to bottom, the packing layer 103 located between the gas supply pipe 101 and the spray pipe 106; a circulating pump 108 located at the bottom of the transparent tower body 1, the liquid suction end of the circulating pump 108 connected to the liquid outlet at the bottom of the transparent tower body 1 via a first connecting pipe 109, and the liquid outlet end of the circulating pump 108 connected to the liquid inlet of the spray pipe 106 via a second connecting pipe 1010; and a demister 1011 fixedly installed inside the transparent tower body 1, located between the spray pipe 106 and the exhaust pipe 102.

[0025] It also includes a support 2, with the transparent tower body 1 vertically mounted on the support 2, and the circulating pump 108 fixedly mounted on the support 2.

[0026] Inside the transparent tower 1, multiple layers of packing 103 are installed via support rings 104 according to design requirements to ensure that the packing 103 is stable and evenly distributed. Immobilized algae are attached to the surface of the packing, providing a basis for gas-liquid contact and microalgae carbon fixation. At the same time, check whether the demister 1011 is installed in place, whether the circulation pump 108 and all pipelines (gas supply pipe 101, exhaust pipe 102, first connecting pipe 109, second connecting pipe 1010, etc.) are tightly connected without leakage, and whether the support 2 provides stable support for the transparent tower 1 and the circulation pump 108.

[0027] Inject algal solution containing microalgae into the bottom of the transparent tower body 1, start the circulation pump 108, the algal solution is sucked in through the first connecting pipe 109, and transported to the spray pipe 106 through the second connecting pipe 1010, and sprayed out from the spray pipe 106 to form a spray state. Observe whether the algal solution circulation is smooth, adjust the parameters of the circulation pump 108 to ensure that the algal solution is sprayed stably and fills the packing layer 103 area, in preparation for subsequent gas-liquid contact.

[0028] The polluted gas containing CO2 is introduced into the bottom of the transparent tower 1 through the gas supply pipe 101. The gas flows from bottom to top and gradually passes through the multi-layer packing layer 103 by relying on its own pressure and flow characteristics. The algal liquid sprayed from the top spray pipe 106 flows from top to bottom and forms a countercurrent contact with the waste gas flowing from bottom to top in the packing layer 103 area. The immobilized algae attached to the surface of the packing layer 103 increases the gas-liquid contact area and prolongs the contact time. CO2 in the waste gas continuously diffuses into the algal liquid. The microalgae absorb CO2 through photosynthesis to fix carbon, thereby achieving the purification treatment of the polluted gas.

[0029] After passing through the packing layer 103, the gas continues to flow upward and passes through the demister 1011. The demister 1011 effectively intercepts small droplets of algae liquid carried in the gas, recovers moisture, and the purified gas is discharged from the exhaust pipe 102.

[0030] During operation, the transparency of the transparent tower body 1 is used to observe the algae spraying situation and the gas-liquid contact state, such as whether there is gas-liquid deviation in the packing layer 103 and whether the algae circulation is stable. At the same time, parameters such as the exhaust gas flow rate of the gas supply pipe 101, the algae concentration in the tower, and the gas composition and content of the exhaust pipe 102 are monitored in real time. The operating conditions are adjusted according to the changes in parameters, such as adjusting the frequency of the circulating pump 108 to change the algae spraying volume, or adjusting the exhaust gas flow rate.

[0031] Regularly clean any impurities and algae deposits that may appear in the gas supply pipe 101 and exhaust pipe 102 to prevent pipe blockage from affecting gas flow. Inspect the packing layer 103. If the activity of the immobilized algae is reduced or the packing is blocked, replace the packing layer 103 in time or reactivate the algae. Perform routine maintenance on the circulation pump 108, check the pump body wear and sealing condition to ensure stable operation and maintain normal circulation of algae solution.

[0032] Through the cylindrical tower structure design, the countercurrent contact method of bottom-intake of waste gas and top-spraying algal liquid, combined with multi-layer packing layer 103 and immobilized algae species, greatly extends the gas-liquid contact time. Compared with traditional contact methods, CO2 in the waste gas can more fully contact with microalgae and be absorbed and fixed. By utilizing the countercurrent absorption principle, the mass transfer process is enhanced, significantly improving carbon fixation efficiency. This effectively solves the problems of short contact time between microalgae and polluting gas and limited carbon fixation efficiency, and can achieve efficient purification treatment of CO2-containing waste gas.

[0033] The bottom circulation pump 108 maintains a stable circulation of algal liquid concentration, ensuring the continuity and stability of gas-liquid contact. The demister 1011 recovers water, reducing algal liquid loss and its impact on subsequent emissions, combining environmental protection and economy. The stable support of the bracket 2 makes the operation of the transparent tower body 1 and its components more reliable, reducing the risk of vibration and displacement during equipment operation and ensuring long-term stable operation.

[0034] The cylindrical structure combined with the multi-layer packing layer 103 design achieves efficient carbon fixation while reducing the floor space compared to some complex purification equipment, making it more suitable for applications with limited space. The transparent tower body 1 allows for direct observation of the internal gas-liquid contact, algae liquid circulation, and other operating statuses, facilitating real-time monitoring by operators to promptly detect and address any abnormalities, thereby improving the convenience and accuracy of equipment operation and management.

[0035] Example 2:

[0036] Reference Figures 1-5 The gas-liquid countercurrent contact purification tower is basically the same as in Example 1, but with a further improvement: each of the four corners at the bottom of the support 2 is connected to a support leg 201 by thread. When the ground at the installation site of the purification tower is uneven, the operator can precisely adjust the extension length of each support leg 201 by rotating the threaded structure, quickly calibrating the support 2 for horizontal alignment and height adaptation, ensuring that the transparent tower body 1 and the entire set of equipment are stably placed, effectively avoiding problems such as equipment tilting and operational vibration caused by ground differences. Moreover, in different application scenarios (such as changes in ground material and height coordination requirements of supporting equipment), there is no need to replace the support 2; simply adjusting the support leg 201 can easily adapt to the installation conditions, greatly improving the flexibility and adaptability of equipment installation, reducing the stringent requirements on the installation environment, and facilitating the rapid deployment and stable operation of the equipment.

[0037] Multiple openings are equidistantly provided on the lower side of the spray pipe 106, and a rotating spray head 107 is connected to each opening. This design, where the spray pipe 106 has openings at its lower side connected to the rotating spray head 107, allows for more efficient algae coverage with fewer spray pipes 106. Traditional spraying methods require multiple spray pipes 106 to ensure uniform algae distribution across the cross-section of the tower. However, the rotating spray head 107 can rotate automatically under the pressure of the algae, and disperses the algae in all directions through centrifugal force, significantly increasing the coverage area of ​​a single spray head. Therefore, by reasonably setting a few openings on the spray pipe 106 and installing rotating spray heads 107, the spraying effect of multiple traditional spray pipes 106 can be replaced, significantly reducing the number of spray pipes 106 used, lowering equipment manufacturing costs and installation complexity, simplifying pipeline layout, reducing the risk of leakage due to too many pipeline connection points, and improving the overall stability of the purification tower.

[0038] A pick-and-place port is horizontally provided on the transparent tower body 1 near the support ring 104. An annular protrusion 105 is provided on the lower side of the support ring 104 inside the transparent tower body 1. The support ring 104 is placed on the annular protrusion 105. The pick-and-place port on the transparent tower body 1 at the corresponding position of the support ring 104, together with the design of the annular protrusion 105, greatly facilitates the replacement of the packing layer 103. When the packing layer 103 has been used for a period of time, the activity of the immobilized algae decreases or the packing becomes clogged. The operator can directly access the support ring 104 through the pick-and-place port. Since the support ring 104 only needs to be placed on the annular protrusion 105, no complicated installation structure is required. It can be easily disassembled by hand or with the help of simple tools. When replacing the new packing layer 103, the support ring 104 and the packing layer 103 can also be quickly placed on the annular protrusion 105 through the pick-and-place port to complete the installation. The whole process is simple to operate, which greatly shortens the time and difficulty of replacing the packing layer 103, reduces the downtime for equipment maintenance, and ensures the continuous and efficient operation of the purification tower.

[0039] Example 3:

[0040] Reference Figures 1-5The gas-liquid countercurrent contact purification tower is basically the same as in Example 2, but with a further improvement: a conical liquid storage tank 3 is fixedly connected to the inside of the transparent tower body 1 near the gas delivery pipe 101 via a support rod. The outlet of the gas delivery pipe 101 is connected to the inlet of the conical liquid storage tank 3. A valve pipe 301 is fixedly connected to one side of the conical liquid storage tank 3. A one-way valve is installed at the liquid outlet at the upper end of the conical liquid storage tank 3. The design of setting up a conical liquid storage tank 3 near the gas delivery pipe 101 inside the transparent tower body 1 and fixing it with a support rod, and connecting it to the outlet of the gas delivery pipe 101, can efficiently perform preliminary treatment of impurities in the waste gas. The waste gas containing carbon dioxide enters the conical liquid storage tank 3 from the gas delivery pipe 101. Subsequently, due to the conical structure of the box, the flow path of the exhaust gas changes and the flow velocity decreases. Some larger particulate impurities settle to the bottom of the storage tank under gravity. At the same time, the washing liquid in the storage tank can wash the exhaust gas, further adsorbing and intercepting dust, oil mist and other impurities in the exhaust gas. After the impurities are intercepted, the purified exhaust gas is discharged into the transparent tower 1 through the liquid outlet. The one-way valve prevents the microalgae solution from entering, ensuring a smooth exhaust gas treatment process. This structure can effectively remove impurities in the exhaust gas without the need for additional complex pretreatment equipment, reduce the impact of impurities on the packing layer 103 and microalgae, extend the service life of the packing, and improve the overall operational stability and carbon fixation efficiency of the purification tower.

[0041] The liquid stored in the conical storage tank 3 is microalgae nutrient solution. The design of storing microalgae nutrient solution in the conical storage tank 3 can cleverly utilize the flow characteristics of waste gas to supplement nutrients for microalgae. When the waste gas enters the conical storage tank 3, it comes into full contact with the nutrient solution. Some of the nutrient solution will adhere to the surface of the waste gas to form tiny droplets. As the waste gas leaves the storage tank and enters the transparent tower 1, the waste gas carrying the nutrient solution will come into contact with the surface of the packing and the sprayed algae solution during the upward flow, releasing the nutrient solution into the algae solution. This method can continuously supplement the microalgae in the tower with the nitrogen, phosphorus and other nutrients required for growth without the need for additional nutrient addition equipment, ensuring the activity and growth metabolism of microalgae, promoting its efficient photosynthesis to fix carbon dioxide, and reducing the frequency of manual nutrient addition, thereby improving the automation and economy of the purification tower operation.

[0042] A waterproof electric heater 302 is fixedly installed at the bottom of the conical storage tank 3. The heating rod of the electric heater 302 is located inside the conical storage tank 3. The design of the waterproof electric heater 302, with its heating rod extending deep into the tank, can heat the exhaust gas. After the exhaust gas containing carbon dioxide enters the conical storage tank 3, it will come into full contact with the microalgae nutrient solution heated by the electric heater 302. On the one hand, the heat in the nutrient solution will be quickly transferred to the exhaust gas, raising the exhaust gas temperature. On the other hand, the electric heater 302 can flexibly adjust the heating power according to actual needs through the temperature control system to maintain the exhaust gas temperature within the optimal temperature range for microalgae growth. At the suitable temperature, the enzyme activity in the microalgae cells is enhanced, and the photosynthetic efficiency is significantly improved, thereby more efficiently absorbing and fixing carbon dioxide in the exhaust gas. At the same time, it avoids inhibiting microalgae activity due to excessively low exhaust gas temperature, ensuring the long-term stable operation of the purification tower and improving the overall carbon fixation efficiency.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A gas-liquid counter-current contact purification column, characterized by, The system includes a transparent tower body (1), with a gas supply pipe (101) fixedly connected to the lower end of one side of the transparent tower body (1) and an exhaust pipe (102) fixedly connected to the upper end of the transparent tower body (1), and further includes: The spray pipe (106) is fixedly connected to the upper part of the interior of the transparent tower body (1); The packing layer (103) is installed inside the transparent tower body (1) by a support ring (104), and multiple layers are arranged from top to bottom. The packing layer (103) is located between the gas transmission pipe (101) and the spray pipe (106). A circulating pump (108) is installed at the bottom of the transparent tower body (1). The suction end of the circulating pump (108) is connected to the discharge port at the bottom of the transparent tower body (1) through a first connecting pipe (109). The discharge end of the circulating pump (108) is connected to the inlet of the spray pipe (106) through a second connecting pipe (1010). The demister (1011) is fixedly installed inside the transparent tower body (1) and located between the spray pipe (106) and the exhaust pipe (102).

2. The gas-liquid countercurrent contact purification column according to claim 1, characterized by It also includes a support (2), the transparent tower body (1) is vertically mounted on the support (2), and the circulating pump (108) is fixedly mounted on the support (2).

3. The gas-liquid countercurrent contact purification column according to claim 2, characterized by The four corners at the bottom of the bracket (2) are each connected to a support leg (201) by a thread.

4. The gas-liquid countercurrent contact purification tower according to claim 1, characterized in that, The spray pipe (106) has multiple openings at equal intervals on its lower side, and a rotating spray head (107) is connected to each opening of the spray pipe (106).

5. The gas-liquid countercurrent contact purification column according to claim 1, characterized by The transparent tower body (1) has a horizontal opening for taking out and putting in near the support ring (104). Inside the transparent tower body (1), there is an annular protrusion (105) located on the lower side of the support ring (104), and the support ring (104) is placed on the annular protrusion (105).

6. The gas-liquid countercurrent contact purification column according to claim 1, characterized by Inside the transparent tower body (1), near the gas transmission pipe (101), a conical liquid storage tank (3) is fixedly connected by a support rod. The gas outlet of the gas transmission pipe (101) is connected to the gas inlet of the conical liquid storage tank (3). A valve pipe (301) is fixedly connected to one side of the conical liquid storage tank (3). A one-way valve is installed at the liquid outlet at the upper end of the conical liquid storage tank (3).

7. The gas-liquid countercurrent contact purification column according to claim 6, characterized by The liquid stored in the conical storage tank (3) is a microalgae nutrient solution.

8. The gas-liquid countercurrent contact purification column according to claim 6, characterized by A waterproof electric heater (302) is fixedly installed at the bottom of the conical liquid storage tank (3), and the heating rod of the electric heater (302) is located inside the conical liquid storage tank (3).

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