Efficient mercury removal and resource recovery device

Abstract

The utility model discloses an efficient demercuration and resource recovery device, which comprises a fixed column, a pipeline system and a demercuration system, the pipeline system is arranged on the front side of the fixed column, and the demercuration system is arranged on the rear side of the fixed column. According to the present invention, the flue gas passes through the adsorption film, the adsorption film adopts the CI-PANI-coated MWCNTs material, the polyaniline (PANI) is the conductive polymer, and does not consume the energy during the Hg < 0 > removal process, the adsorbed Hg is stable at the high temperature and does not release the Hg again, and the easy acid doping / dealkalization performance and the excellent environmental stability make the regeneration method simple and mild, and the method has the characteristics of environmental protection and environmental protection. Therefore, the adsorption film has excellent reusability, good water resistance and high thermal stability, and has cyclic utilization and relatively high practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of mercury removal, in particular to a high-efficiency mercury removal and resource recovery device. Background Art

[0002] Existing devices utilize oxidation absorption, adsorption and catalytic oxidation to efficiently remove mercury, but all of them have corresponding disadvantages.

[0003] Oxidation method: The main oxidation absorption methods include O3 removal method, chlorine species method, ultraviolet irradiation hydrogen peroxide method, etc. However, ozone currently has problems such as high preparation cost, instability, difficulty in transportation, and immature application technology; sodium chlorite is relatively expensive, and there is a risk of excessive chloride ions when removing pollutants.

[0004] Adsorption method: using physical and chemical adsorption to 0 Converted to Hg 2+ and Hg P , and is removed through subsequent dust removal and desulfurization equipment, but the modified activated carbon has problems such as long preparation time and high cost.

[0005] Catalytic oxidation method: mainly includes photocatalytic oxidation technology, metal and metal oxide catalytic oxidation technology, etc. For example, the catalytic oxidation of Mo-modified manganese oxide has high efficiency in removing mercury, but in the process of removing mercury, there is Hg 2+ The restore and release problem.

[0006] Therefore, the utility model provides a high-efficiency mercury removal and resource recovery device to solve the above problems. Utility Model Content

[0007] In view of the deficiencies of the prior art, the utility model provides a highly efficient mercury removal and resource recovery device to solve the above problems.

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: an efficient mercury removal and resource recovery device, including a fixed column, a pipeline system and a mercury removal system,

[0009] The pipeline system is arranged at the front side of the fixed column, and the mercury removal system is arranged at the rear side of the fixed column.

[0010] Preferably, the pipeline system includes a first electric three-way valve and a second electric three-way valve, the first electric three-way valve and the second electric three-way valve are fixedly connected to the front side of a fixed column, the front side of the first electric three-way valve is connected to a main infusion pipeline, and the right end of the first electric three-way valve is connected to a first pipeline.

[0011] Preferably, the front end of the second electric three-way valve is connected to an air intake main pipeline, the side of the second electric three-way valve is connected to an air intake pipeline, and the pipeline system also includes a second pipeline and an air outlet pipeline.

[0012] Preferably, the mercury removal system further comprises a mercury removal cylinder, which is fixedly connected to the rear side of the fixed column via a fixing plate, a cylinder cover is arranged on the upper side of the mercury removal cylinder, an adsorption film is arranged inside the cylinder cover, and the second pipe is fixedly connected to the gas outlet pipe on the mercury removal cylinder.

[0013] Preferably, the lower side of the mercury removal cylinder is connected to an electric valve, and the lower side of the electric valve is connected to a liquid discharge pipe.

[0014] Preferably, an adsorption film is provided inside the demercuration cylinder, and the material of the adsorption film is Cl - Doped protonated polyaniline-capped multi-walled carbon nanotubes (CI-PANI@MWCNTs).

[0015] Beneficial Effects

[0016] The utility model provides a highly efficient mercury removal and resource recovery device. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The efficient mercury removal and resource recovery device uses an adsorption membrane set inside the mercury removal cylinder to allow flue gas to pass through the adsorption membrane. The adsorption membrane is made of CI-PANI@MWCNTs material. The polyaniline (PANI) it contains is a conductive polymer that has the ability to remove Hg 0 The process has the advantage of not consuming energy, the adsorbed Hg is stable at high temperature and no Hg is released, its easy acid doping / de-alkali performance and excellent environmental stability make the regeneration method simple and gentle, so that the adsorption membrane has excellent reusability, good water resistance and high thermal stability, thus having recycling and high practicality.

[0018] (2) The raw materials of the adsorption membrane of this efficient mercury removal and resource recovery device are easily available and reusable, with high economic benefits. The raw materials used in the new composite membrane materials developed by our team are all common industrial raw materials. The raw materials are cheap and can be used for a long time, which has higher economic benefits than conventional mercury removal technology.

[0019] (3) The highly efficient mercury removal and resource recovery device, by setting up two mercury removal cylinders and a pipeline system for use in combination, can maintain the continuity of mercury removal of the entire device and also facilitate the regeneration of the adsorption membrane. One cylinder is in operation while the other is recovering, giving the adsorption membrane enough time to regenerate and recover mercury, without secondary pollution, and with high environmental benefits.

[0020] (4) This highly efficient mercury removal and resource recovery device adsorbs Cl on the membrane -Doping is a good doping process, which is beneficial to accelerate electron transfer and redox reaction. - Species can greatly increase Hg 0 Excellent removal performance and high mercury removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0022] Figure 2 It is a piping system diagram of the utility model;

[0023] Figure 3 It is a cross-sectional view of the interior of the mercury removal cylinder of the utility model;

[0024] Figure 4 It is a rear view of the structure of the utility model;

[0025] Figure 5 It is a structural side view of the utility model.

[0026] In the figure: 1. Fixed column;

[0027] Pipeline system: 21, air inlet pipeline; 22, first pipeline; 23, second pipeline; 24, air outlet pipeline; 25, main air inlet pipeline; 26, main liquid infusion pipeline; 27, first electric three-way valve; 28, second electric three-way valve;

[0028] Mercury removal system: 31. Mercury removal cylinder; 32. Cylinder cover; 33. Electric valve; 34. Drain pipe; 35. Adsorption membrane. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in 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 in 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.

[0030] Embodiment 1:

[0031] See also Figure 1-5 , a highly efficient mercury removal and resource recovery device, comprising a fixed column 1, a pipeline system and a mercury removal system,

[0032] The pipeline system is arranged at the front side of the fixed column 1 , and the mercury removal system is arranged at the rear side of the fixed column 1 .

[0033] The pipeline system includes a first electric three-way valve 27 and a second electric three-way valve 28. The first electric three-way valve 27 and the second electric three-way valve 28 are fixedly connected to the front side of the fixed column 1. The front side of the first electric three-way valve 27 is connected to the main infusion pipeline 26, and the right end of the first electric three-way valve 27 is connected to the first pipeline 22.

[0034] The front end of the second electric three-way valve 28 is connected to the intake main pipeline 25 , and the side of the second electric three-way valve 28 is connected to the intake pipeline 21 . The pipeline system also includes a second pipeline 23 and an outlet pipeline 24 .

[0035] The mercury removal system also includes a mercury removal cylinder 31, which is fixedly connected to the rear side of the fixed column 1 through a fixing plate. A cylinder cover 32 is arranged on the upper side of the mercury removal cylinder 31, and an adsorption film 35 is arranged inside the cylinder cover 32. The second pipe 23 and the gas outlet pipe 24 are fixedly connected to the mercury removal cylinder 31.

[0036] The lower side of the mercury removal cylinder 31 is connected to an electric valve 33 , and the lower side of the electric valve 33 is connected to a liquid discharge pipe 38 .

[0037] The mercury removal cylinder 31 is provided with an adsorption film 35, and the material of the adsorption film 35 is Cl - Doped protonated polyaniline-capped multi-walled carbon nanotubes (CI-PANI@MWCNTs).

[0038] Working process:

[0039] A certain amount of acidic sodium chloride solution is introduced through the second pipe 23, and the amount of the acidic sodium chloride solution is controlled to prevent the solution inside the demercuration cylinder 31 from being higher than the height of the second pipe 23 and lower than the bottom of the adsorption membrane 35. The second electric three-way valve 28 is manually controlled to be opened, so that the second electric three-way valve 28 allows flue gas to be introduced. After the flue gas passes through the adsorption membrane 35, the material of the adsorption membrane 35 is CI-PANI@MWCNTs, and the adsorption membrane 35 can separate and enrich the gaseous elemental mercury in the flue gas. The gaseous elemental mercury is enriched by the adsorption membrane 35 and melted into the acidic sodium chloride solution. The demercured flue gas is discharged through the outlet pipe 24. The second electric three-way valve 28 is manually controlled to be opened. An electric three-way valve 27 is used to pass the sulfur-containing solution through the main liquid infusion pipeline 26. The sulfur-containing solution enters the demercuration cylinder 31 and reacts with the mercury in the sodium chloride solution to generate mercuric sulfide precipitation. The electric valve 33 is opened to discharge the solution inside the demercuration cylinder 31 to a designated location for collection through the discharge pipe 38. When the waste liquid and mercuric sulfide are collected on the left side, the left side of the second electric three-way valve 28 is controlled to be closed and the right side is opened to discharge the flue gas into the right demercuration cylinder 31 to maintain overall continuity. It is also convenient for the left side to pass the sodium chloride solution again to regenerate the adsorption membrane 35, so that one is running and the other is recovering, giving enough time for the adsorption membrane 35 to regenerate and the mercury to recover.

[0040] The heavy metal adsorption membrane prepared by CI-PANI@MWCNTs material 35 realizes the separation and enrichment of gas phase mercury, and can remove highly volatile and insoluble Hg in flue gas. 0 .Cl - Doped protonated polyaniline-coated multi-walled carbon nanotubes (Cl-PANI@MWCNTs) have excellent reusability, good water resistance and high thermal stability. Due to the conjugation effect, MWCNT has excellent conductivity. Polyaniline (PANI) is a conductive polymer with the ability to remove Hg 0 The process does not consume energy, the adsorbed Hg is stable at high temperature and there is no Hg release, its easy acid doping / de-alkalization performance and excellent environmental stability make the regeneration method simple and mild. Doping and protonating PANI can greatly improve its conductivity. - Doping is a good doping process, which is beneficial to accelerate electron transfer and redox reaction. - Species can greatly increase Hg 0 removal performance.

[0041] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient mercury removal and resource recovery device, comprising a fixed column (1), characterized in that: It also comprises a pipeline system and a mercury removal system, wherein the pipeline system is arranged on the front side of the fixed column (1), and the mercury removal system is arranged on the rear side of the fixed column (1); The mercury removal system comprises a mercury removal cylinder (31), the mercury removal cylinder (31) being fixedly connected to the rear side of a fixed column (1) via a fixed plate, a cylinder cover (32) being arranged on the upper side of the mercury removal cylinder (31), an adsorption film (35) being arranged inside the cylinder cover (32), and a second pipe (23) and an air outlet pipe (24) being fixedly connected to the mercury removal cylinder (31).

2. The high-efficiency mercury removal and resource recovery device according to claim 1, characterized in that: The pipeline system comprises a first electric three-way valve (27) and a second electric three-way valve (28), wherein the first electric three-way valve (27) and the second electric three-way valve (28) are fixedly connected to the front side of the fixed column (1), the front side of the first electric three-way valve (27) is connected to the main infusion pipeline (26), and the right end of the first electric three-way valve (27) is connected to the first pipeline (22).

3. The high-efficiency mercury removal and resource recovery device according to claim 2, characterized in that: The front end of the second electric three-way valve (28) is connected to an air intake main pipeline (25), and the side of the second electric three-way valve (28) is connected to an air intake pipeline (21). The pipeline system also includes a second pipeline (23) and an air outlet pipeline (24).

4. The high-efficiency mercury removal and resource recovery device according to claim 1, characterized in that: The lower side of the mercury removal cylinder (31) is connected to an electric valve (33), and the lower side of the electric valve (33) is connected to a liquid discharge pipe (34).

5. The high-efficiency mercury removal and resource recovery device according to claim 4, characterized in that: An adsorption film (35) is arranged inside the mercury removal cylinder (31), and the material of the adsorption film (35) is Cl - Doped protonated polyaniline-coated multi-walled carbon nanotubes.

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