Membrane superposition type flue gas demercuration device

Abstract

The utility model relates to the technical field of flue gas demercuration, in particular to a membrane superposition type flue gas demercuration device which comprises liquid membrane reaction chambers, the liquid membrane reaction chambers are arranged on the left side of a liquid bearing chamber at intervals, and gaseous membrane reaction chambers are arranged on the right side of the liquid bearing chamber at intervals. The gaseous membrane reaction chamber is connected with the liquid bearing chamber through a first connecting pipe and a second connecting pipe, the liquid membrane reaction chamber is connected with the liquid bearing chamber through a third connecting pipe and a fourth connecting pipe, a liquid membrane is assembled in the liquid membrane reaction chamber, and a gaseous membrane is arranged in the gaseous membrane reaction chamber. According to the utility model, the liquid bearing chamber is connected with the gaseous membrane reaction chamber through the transition interface, a solution can enter the reaction chamber to achieve the effect of regenerating a gaseous membrane, and the membrane can be reused, and the liquid membrane reaction chamber is arranged, so that mercury ions in mercury-containing waste liquid can be converted into mercury ore at a liquid membrane, and the recycling of resources is realized; the waste liquid is converted into the original solution again for reuse, so that the consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas mercury removal, in particular to a membrane stacking type flue gas mercury removal device. Background Art

[0002] Flue gas demercurization refers to the process of removing mercury from flue gas by specific technical means. Flue gas demercurization is a technology for removing mercury from industrial flue gas, especially from flue gas from coal-fired power plants. Mercury is a harmful substance that has serious impacts on the environment and human health, so flue gas demercurization is crucial to protecting the environment and human health. The principles of flue gas demercurization technology mainly include chemical adsorption, physical adsorption and chemical reaction. These technical means are aimed at capturing and converting mercury in flue gas to reduce its emission into the atmosphere. Mercury in flue gas mainly exists in three forms: elemental mercury (Hg0), divalent mercury (Hg2+) and particulate mercury (HgP). Among them, elemental mercury is the most difficult form to remove from flue gas due to its high volatility, poor solubility in water and stability. Divalent mercury and particulate mercury are relatively easy to capture by conventional wet flue gas desulfurization equipment or dust removal equipment.

[0003] However, the existing mercury removal equipment will produce some waste gas after flue gas mercury removal, and there are liquids, water vapor and other substances in the waste, and the existing mercury removal equipment does not have the effect of integrated gas and liquid mercury removal, resulting in poor gas treatment and high consumption cost. The existing mercury removal technology has certain disadvantages in terms of cost and removal efficiency. In order to overcome the shortcomings of the existing technology, membrane technology has great potential in the environmental field based on the characteristics of simple process, wide applicability and low cost. Therefore, it is of great significance to research and develop economical, efficient and secondary pollution-free membrane mercury removal technology. The utility model provides a membrane stacked flue gas mercury removal device. Utility Model Content

[0004] In view of the existing deficiencies, the utility model provides a membrane stacking type flue gas mercury removal device, which solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A membrane stacking flue gas mercury removal device comprises a liquid membrane reaction chamber and a liquid bearing chamber, wherein the liquid membrane reaction chamber is arranged at a distance on the left side of the liquid bearing chamber, and a gas membrane reaction chamber is arranged at a distance on the right side of the liquid bearing chamber, the gas membrane reaction chamber is connected to the liquid bearing chamber through a first connecting pipe and a second connecting pipe, and the liquid membrane reaction chamber is connected to the liquid bearing chamber through a third connecting pipe and a fourth connecting pipe, a liquid membrane is arranged inside the liquid membrane reaction chamber, a gas membrane is arranged inside the gas membrane reaction chamber, a liquid introduction pipe is connected to the front end of the liquid bearing chamber, a waste liquid discharge pipe is connected to the rear end of the liquid bearing chamber, a gas receiving pipe is connected to the front end of the gas membrane reaction chamber, and a gas discharge pipe is connected to the rear end of the gas membrane reaction chamber.

[0007] Furthermore, the gas receiving pipe, the gas discharge pipe, the waste liquid discharge pipe and the liquid introduction pipe are all equipped with solenoid valves.

[0008] Furthermore, the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all equipped with transition joints.

[0009] Furthermore, a partition is vertically arranged in the middle of the liquid bearing chamber, and the partition divides the internal space of the liquid bearing chamber into two parts.

[0010] Furthermore, a group of C-shaped connecting tubes are connected to the right side of the liquid carrying chamber, one end of the connecting tubes is connected to the front space of the liquid carrying chamber, and the other end is connected to the rear space.

[0011] Furthermore, the connecting pipe is equipped with a valve.

[0012] Furthermore, a solution detector is provided in the liquid carrying chamber.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model is provided with a transition interface to connect the liquid bearing chamber with the gas membrane reaction chamber, so that the solution can enter the reaction chamber to achieve the effect of regenerating the gas membrane and realize the reuse of the membrane. The liquid membrane reaction chamber is provided so that the mercury-containing waste liquid can realize the conversion of mercury ions into mercury ore at the liquid membrane, realize the recycling of resources, and convert the waste liquid back into the original solution for reuse, reducing consumption.

[0015] 2. The utility model overcomes three key problems: efficient removal of multi-media mercury, rapid regeneration of composite membranes with low energy consumption, and resource recovery of multi-form mercury. The membrane material can be regenerated after adsorbing mercury, has good regenerative performance, and has good acid resistance. The use of membrane products and reactor systems can greatly solve the problem of excessive heavy metal mercury emissions, achieve green, high efficiency and low cost, and solve the pain points of enterprises in the field of environmental protection.

[0016] 3. The membrane stacking flue gas mercury removal technology used in the utility model does not release the mercury on the composite membrane material into the environment during the mercury removal process, does not cause secondary pollution, meets environmentally friendly requirements, does not cause secondary damage to the environment, and has high environmental benefits.

[0017] 4. The device achieves efficient and low-cost flue gas demercurization by integrating liquid membrane and gas membrane technology, which not only improves the demercurization efficiency, but also reduces the liquid and water vapor content in the exhaust gas, making a positive contribution to environmental protection, improving gas treatment effects and reducing consumption costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic structural diagram of the utility model from another angle.

[0020] Figure 3 It is a partial cross-sectional view of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the liquid carrying chamber in the utility model.

[0022] In the figure: 1. liquid membrane reaction chamber; 2. liquid carrying chamber; 3. gas membrane reaction chamber; 4. first connecting pipe; 5. second connecting pipe; 6. third connecting pipe; 7. fourth connecting pipe; 8. transition joint; 9. solution detector; 10. liquid inlet pipe; 11. gas receiving pipe; 12. gas discharge pipe; 13. waste liquid discharge pipe; 14. solenoid valve; 15. liquid membrane; 16. gas membrane; 17. partition; 18. connecting pipe; 19. valve. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example:

[0025] like Figures 1 to 4As shown, a membrane stacking flue gas mercury removal device comprises a liquid membrane reaction chamber 1 and a liquid bearing chamber 2, wherein the liquid membrane reaction chamber 1 is arranged at intervals on the left side of the liquid bearing chamber 2, and a gas membrane reaction chamber 3 is arranged at intervals on the right side of the liquid bearing chamber 2, the gas membrane reaction chamber 3 is connected to the liquid bearing chamber 2 through a first connecting pipe 4 and a second connecting pipe 5, the liquid membrane reaction chamber 1 is connected to the liquid bearing chamber 2 through a third connecting pipe 6 and a fourth connecting pipe 7, a liquid membrane 15 is installed inside the liquid membrane reaction chamber 1, and a gas membrane 15 is installed inside the gas membrane reaction chamber 3 The gas membrane 16, the front end of the liquid carrying chamber 2 is connected to a liquid introduction pipe 10, the rear end of the liquid carrying chamber 2 is connected to a waste liquid discharge pipe 13, the front end of the gas membrane reaction chamber 3 is connected to a gas receiving pipe 11, and the rear end of the gas membrane reaction chamber 3 is connected to a gas discharge pipe 12. This design solves the problem that the existing mercury removal equipment will generate some waste gas after flue gas mercury removal, and there are liquids, water vapor and other substances in the waste gas, and the existing mercury removal equipment does not have the effect of integrated gas-liquid mercury removal, resulting in poor gas treatment and high consumption cost.

[0026] The gas receiving pipe 11, the gas discharge pipe 12, the waste liquid discharge pipe 13 and the liquid introduction pipe 10 are all equipped with electromagnetic valves 14. The electromagnetic valves 14 are used to control the on-off of each pipeline, which plays a role in automatically controlling the flow of fluid, providing the device with higher control flexibility and accuracy.

[0027] The first connecting pipe 4, the second connecting pipe 5, the third connecting pipe 6 and the fourth connecting pipe 7 are all equipped with transition joints 8. The transition joints 8 are used to control the opening and closing of the first connecting pipe 4, the second connecting pipe 5, the third connecting pipe 6 and the fourth connecting pipe 7, and can ensure the smooth connection between the pipes, reduce the resistance of the fluid at the pipe connection, provide better sealing performance, and prevent gas or liquid leakage at the connection.

[0028] A partition 17 is vertically arranged in the middle of the liquid carrying chamber 2, and the partition 17 divides the internal space of the liquid carrying chamber 2 into two parts. By separating the spaces, the flow and processing flow of the liquid and gas can be optimized. The liquid and gas can be processed in different areas respectively, avoiding mixing and cross contamination, thereby improving the processing efficiency.

[0029] A set of C-shaped connecting pipes 18 are connected to the right side of the liquid carrying chamber 2. One end of the connecting pipe 18 is connected to the front space of the liquid carrying chamber 2, and the other end is connected to the rear space. This design realizes the connection between the two separated areas inside the liquid carrying chamber 2 through the C-shaped connecting pipe 18, which is convenient for the later discharge of waste liquid.

[0030] The connecting pipe 18 is equipped with a valve 19 for controlling the flow of liquid between the two separated areas. When the valve 19 is opened, the liquid in the front area will flow to the rear area and then be discharged through the waste liquid discharge pipe 13 to facilitate the later discharge of the waste liquid.

[0031] A solution detector 9 is provided in the liquid carrying chamber 2. The solution detector 9 is provided to facilitate detection of the solution in the liquid carrying chamber 2, and can detect whether the liquid meets the requirements for recycling, thereby achieving recycling, reducing solution consumption, and reducing costs.

[0032] The working principle of the membrane stacking flue gas mercury removal device is as follows: in actual use, the solenoid valve 14 on the gas receiving pipe 11 is opened, and the flue gas enters the gas membrane reaction chamber 3 through the gas receiving pipe 11, and the flue gas fully reacts with the gas membrane 16 in the gas membrane reaction chamber 3, and the mercury pollutants in the gas are enriched on the gas membrane 16. After the flue gas is successfully demercured, the gas is discharged from the device through the gas discharge pipe 12;

[0033] The flue gas demercuration reaction causes the gaseous membrane 16 in the gaseous membrane reaction chamber 3 to be used. To achieve the purpose of regeneration, the solenoid valve 14 on the liquid introduction pipe 10 is opened, and the sodium chloride or hydrogen chloride solution is introduced into the liquid bearing chamber 2 through the liquid introduction pipe 10. At this time, the transition interfaces on the first connecting pipe 4, the third connecting pipe 6 and the fourth connecting pipe 7 are in a closed state, and the solution flows into the gaseous membrane reaction chamber 3 through the second connecting pipe 5, so that the gaseous membrane 16 is immersed in the sodium chloride or hydrogen chloride solution, and the base-rich mercury on the membrane falls off, and the gaseous membrane 16 is regenerated. The original solution contains mercury, so it becomes mercury-containing wastewater and needs to be treated in the next step;

[0034] At this time, the transition interfaces on the second connecting pipe 5 and the third connecting pipe 6 are closed, and the transition interfaces on the first connecting pipe 4 and the fourth connecting pipe 7 are opened, and the mercury-containing wastewater will flow from the gas membrane reaction chamber 3 through the liquid bearing chamber 2 and finally reach the liquid membrane reaction chamber 1. The mercury-containing wastewater undergoes mercury removal reaction in the liquid membrane reaction chamber 1, and finally the mercury is enriched on the liquid membrane, thereby realizing the treatment of the mercury-containing wastewater;

[0035] After the mercury-containing wastewater is treated, it is converted back into a pure solution of sodium chloride or hydrogen chloride. At this time, the transition interface on the third connecting pipe 6 is opened, and the other transition interfaces are in a closed state. The solution will flow back from the liquid membrane reaction chamber 1 to the liquid bearing chamber 2. Since the solution obtained by treating the wastewater is consistent with the solution introduced at the beginning, in order to achieve recycling, reduce the consumption of sodium chloride or hydrogen chloride solution, and reduce costs, a solution detector 9 is provided in the liquid bearing chamber 2. If the solution obtained at this time meets the detection index, it can directly flow into the gas membrane reaction chamber 3 through the second connecting pipe 5 and enter the circulation again. If the solution detection does not meet the standard, the valve 19 on the connecting pipe 18 will be opened, the solution will flow out from the waste liquid discharge pipe 13, and then a new solution will be introduced through the liquid introduction pipe 10, and the device will start to circulate again.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A membrane stacking flue gas mercury removal device, comprising a liquid membrane reaction chamber (1) and a liquid carrying chamber (2), characterized in that: The liquid membrane reaction chamber (1) is arranged at a distance on the left side of the liquid bearing chamber (2), and a gas membrane reaction chamber (3) is arranged at a distance on the right side of the liquid bearing chamber (2). The gas membrane reaction chamber (3) is connected to the liquid bearing chamber (2) through a first connecting pipe (4) and a second connecting pipe (5), and the liquid membrane reaction chamber (1) is connected to the liquid bearing chamber (2) through a third connecting pipe (6) and a fourth connecting pipe (7). A liquid membrane (15) is installed inside the liquid membrane reaction chamber (1), and a gas membrane (16) is arranged inside the gas membrane reaction chamber (3). The front end of the liquid bearing chamber (2) is connected to a liquid introduction pipe (10), and the rear end of the liquid bearing chamber (2) is connected to a waste liquid discharge pipe (13). The front end of the gas membrane reaction chamber (3) is connected to a gas receiving pipe (11), and the rear end of the gas membrane reaction chamber (3) is connected to a gas discharge pipe (12).

2. The membrane stacking flue gas mercury removal device according to claim 1, characterized in that: The gas receiving pipe (11), the gas discharge pipe (12), the waste liquid discharge pipe (13) and the liquid introduction pipe (10) are all equipped with solenoid valves (14).

3. The membrane stacking flue gas mercury removal device according to claim 1, characterized in that: The first connecting pipe (4), the second connecting pipe (5), the third connecting pipe (6) and the fourth connecting pipe (7) are all equipped with transition joints (8).

4. The membrane stacking flue gas mercury removal device according to claim 1, characterized in that: A partition plate (17) is vertically arranged in the middle of the liquid carrying chamber (2), and the partition plate (17) divides the internal space of the liquid carrying chamber (2) into two parts.

5. The membrane stacking flue gas mercury removal device according to claim 4, characterized in that: A group of C-shaped connecting tubes (18) are connected to the right side of the liquid carrying chamber (2), one end of the connecting tube (18) is connected to the front space of the liquid carrying chamber (2), and the other end is connected to the rear space.

6. The membrane stacking flue gas mercury removal device according to claim 5, characterized in that: The connecting pipe (18) is equipped with a valve (19).

7. The membrane stacking flue gas mercury removal device according to claim 4, characterized in that: A solution detector (9) is provided in the liquid carrying chamber (2).

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