Mercury-containing flue gas pre-filtering device

Abstract

The utility model discloses a mercury-containing flue gas pre-filtering device, which relates to the technical field of gas purification and comprises a base and a bottom plate, a collecting box and an adsorbent tank are fixed on the top of the base through a support, the top of the collecting box is communicated with an absorption chamber through a flow guide pipe, and the top of the adsorbent tank is communicated with a lifting pipe through a lifting pump. An electromagnetic valve is installed on the surface of the flow guide pipe, a stirring paddle is installed in the absorption chamber in a penetrating mode, a primary filtering structure is welded to the top of the bottom plate, and a pumping and draining structure is detachably connected to the top of the primary filtering structure. According to the utility model, the mercury-containing flue gas can be primarily filtered and repeatedly adsorbed and filtered by arranging a filtering mode of combining the primary filtering structure and the repeated filtering structure, and an adsorbent in the absorption chamber can be scattered and stirred for multiple times by arranging the stirring paddle capable of continuously rotating in the absorption chamber, so that the adsorption efficiency is improved. The adsorbent is in full contact with the mercury-containing flue gas, so that the adsorption strength of the adsorbent on the mercury-containing flue gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas purification, in particular to a mercury-containing flue gas pre-filtering device. Background Art

[0002] Coal-fired flue gas and non-ferrous metal smelting flue gas are currently the two main sources of anthropogenic mercury emissions. Mercury-containing flue gas affects air quality. When the mercury vapor content in the air reaches a certain concentration, it will cause damage to the respiratory system of humans and animals. The main methods for removing mercury from non-ferrous metal smelting flue gas are condensation, adsorption and absorption. Among them, the condensation method uses the decrease in mercury vapor pressure to condense and remove it to achieve the purpose of separation from the flue gas; the adsorption method uses a large adsorption capacity adsorbent to adsorb and recover mercury in the flue gas under certain temperature and mercury content conditions; the absorption method is currently a common method for purifying gaseous pollutants in flue gas. When the adsorption method is used to pre-filter mercury-containing flue gas, the existing pre-filtration method is to use an adsorbent to naturally adsorb mercury-containing flue gas. This pre-filtration efficiency is low and takes a long time, which is not conducive to improving the pre-filtration efficiency and strength of mercury-containing flue gas. For this reason, we propose a mercury-containing flue gas pre-filtration device that can effectively improve the adsorption strength of mercury-containing flue gas. Utility Model Content

[0003] The purpose of the utility model is to provide a mercury-containing flue gas pre-filtering device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mercury-containing flue gas pre-filter device, comprising a base and a bottom plate, the base and the bottom plate serving as the bottom support structure of the pre-filter device, a collection box and an adsorbent tank being fixed to the top of the base by a bracket, the adsorbent tank being used to store adsorbents, the adsorbents being one or more of carbon-based adsorbents, metal oxide adsorbents, precious metal adsorbents or metal sulfides, the top of the collection box being connected to an absorption chamber via a guide tube, the top of the adsorbent tank being connected to a lifting pipe via a lifting pump, the lifting pipe lifting the adsorbent in the adsorbent tank to the absorption chamber, an electromagnetic valve being installed on the surface of the guide tube, an agitating paddle being installed through the interior of the absorption chamber, a primary filtering structure being welded to the top of the bottom plate, the primary filtering structure performing preliminary adsorption and filtration on mercury flue gas to reduce the content of mercury in the flue gas, the top of the primary filtering structure being detachably connected to an exhaust structure, the side of the exhaust structure being connected to the absorption chamber, and the lower end of the primary filtering structure being connected to an access pipe.

[0005] As a further solution of the utility model: a counterweight block is welded at the bottom of the base, the counterweight block is a truncated cone with a radial bottom end, and a connecting block with a threaded hole is welded on the side of the counterweight block. The counterweight block can lower the center of gravity of the pre-filter device and improve the stability of the pre-filter device.

[0006] As a further solution of the utility model: a conical cavity is welded at the bottom of the collection box, the conical cavity is a hollow conical tube with a closed lower end, and an opening is opened through the bottom of the conical cavity. The conical cavity can concentrate the used adsorbent at the bottom of the collection box for easy discharge to the outside of the collection box.

[0007] As a further solution of the utility model: a telescopic cylinder is fixed through the inside of the base, and the top of the telescopic cylinder is connected to a plug made of rubber material, the top of the plug is formed with a rounded surface, the plug is adapted to be snap-fitted with the opening, and the telescopic cylinder is started, and the telescopic cylinder pulls the plug up to adapt to the opening, so as to seal the bottom of the collection box, and when the telescopic cylinder pulls the plug down and separates from the opening, it is convenient for the collection box to discharge the adsorbent collected inside.

[0008] As a further solution of the utility model: one end of the stirring paddle is connected to a motor, the stirring paddle includes a plurality of hard plates arranged at equal intervals, the width of the stirring paddle is equal to the width of the absorption chamber, and the stirring paddle can stir the adsorbent in the absorption chamber to facilitate the rapid adsorption of mercury in the flue gas.

[0009] As a further solution of the utility model: a plurality of breaking rods are glued and connected to the inner wall of the absorption chamber, and the breaking rods are elastic cylindrical rods, which can prevent the adsorbent from agglomerating.

[0010] As a further solution of the utility model: the primary filtration structure includes a primary filtration bin and an activated carbon adsorption plate. The interior of the primary filtration bin is detachably connected with an activated carbon adsorption plate. The activated carbon adsorption plate is a long spiral activated carbon particle plate. The surface of the primary filtration bin is connected with a bin door, which facilitates the replacement of the activated carbon adsorption plate.

[0011] As a further solution of the utility model: the exhaust structure includes a connecting pipe and an exhaust fan, the connecting pipe is welded to the exhaust fan, the exhaust fan is connected with the absorption chamber through, and the exhaust fan can drain the mercury-containing flue gas.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model can perform preliminary filtration and repeated adsorption filtration on mercury-containing flue gas by setting a filtration method combining a primary filtration structure with a repeated filtration structure. By installing a stirring paddle that can rotate continuously in the absorption chamber, the adsorbent in the absorption chamber can be dispersed and stirred multiple times, so that the adsorbent is fully in contact with the mercury-containing flue gas, thereby improving the adsorption strength of the adsorbent on the mercury-containing flue gas.

[0014] 2. The utility model welds a counterweight block at the bottom of the base, which can lower the center of gravity of the pre-filter device, thereby improving the stability of the pre-filter device. The plug is pulled up by the telescopic cylinder to fit the opening, so as to seal the bottom of the collection box. When the plug is pulled down and separated from the opening by the telescopic cylinder, the adsorbent collected in the collection box can be discharged easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 It is a partial exploded structural diagram of the utility model;

[0017] Figure 3 It is a front view of the utility model.

[0018] In the figure: 1. base; 2. counterweight; 3. connecting block; 4. bracket; 5. collecting box; 51. conical cavity; 6. adsorbent tank; 7. guide pipe; 8. solenoid valve; 9. absorption chamber; 10. stirring slurry; 11. breaking rod; 12. lifting pipe; 13. lifting pump; 14. telescopic cylinder; 15. plug; 16. vacuum pump; 17. connecting pipe; 18. primary filtration bin; 181. bin door; 19. activated carbon adsorption plate; 20. bottom plate; 21. access pipe. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-Figure 3 The utility model provides a technical solution: a mercury-containing flue gas pre-filter device, comprising a base 1 and a bottom plate 20, the base 1 and the bottom plate 20 serving as the bottom support structure of the pre-filter device, a collecting box 5 and an adsorbent tank 6 being fixed to the top of the base 1 through a bracket 4, the adsorbent tank 6 being used to store adsorbent, the adsorbent being a carbon-based adsorbent, the top of the collecting box 5 being connected to an absorption chamber 9 through a guide tube 7, the top of the adsorbent tank 6 being connected to a lifting pipe 12 through a lifting pump 13, the lifting pipe 12 lifting the adsorbent in the adsorbent tank 6 to the absorption chamber 9, and a solenoid valve 8 being installed on the surface of the guide tube 7.

[0021] A stirring paddle 10 is installed throughout the interior of the absorption chamber 9, one end of which is connected to a motor. The stirring paddle 10 includes a plurality of hard plates arranged at equal intervals, and the width of the stirring paddle 10 is equal to the width of the absorption chamber 9. The stirring paddle 10 can stir the adsorbent in the absorption chamber 9 to facilitate the rapid adsorption of mercury in the flue gas. A primary filtering structure is welded to the top of the bottom plate 20, and the primary filtering structure performs preliminary adsorption and filtration on the mercury flue gas to reduce the mercury content in the flue gas. The primary filtering structure includes a primary filtering bin 18 and an activated carbon adsorption plate 19. The interior of the primary filtering bin 18 is detachably connected with an activated carbon adsorption plate 19, and the activated carbon adsorption plate 19 is a long spiral activated carbon granular plate. The surface of the primary filtering bin 18 is connected with a bin door 181, and the bin door 181 is convenient for replacing the activated carbon adsorption plate 19.

[0022] The top of the primary filtering structure is detachably connected to an exhaust structure, the side of the exhaust structure is connected to the absorption chamber 9, the lower end of the primary filtering structure is connected to an access pipe 21, the exhaust structure includes a connecting pipe 17 and an exhaust fan 16, the connecting pipe 17 is welded and connected to the exhaust fan 16, the exhaust fan 16 is connected to the absorption chamber 9, and the exhaust fan 16 can drain the mercury-containing flue gas.

[0023] Preferably, Figure 1 As shown, a counterweight block 2 is welded to the bottom of the base 1. The counterweight block 2 is a truncated cone with a radial bottom end. A connecting block 3 with a threaded hole is welded to the side of the counterweight block 2. The counterweight block 2 can lower the center of gravity of the pre-filter device and improve the stability of the pre-filter device.

[0024] Preferably, Figure 3 As shown, a conical cavity 51 is welded to the bottom of the collecting box 5. The conical cavity 51 is a hollow conical tube with a closed lower end. An opening is opened through the bottom of the conical cavity 51. The conical cavity 51 can concentrate the used adsorbent at the bottom of the collecting box 5 to facilitate discharge to the outside of the collecting box 5.

[0025] Preferably, Figure 3 As shown, a telescopic cylinder 14 is fixedly passed through the interior of the base 1, and a plug 15 made of rubber material is connected to the top of the telescopic cylinder 14. The top of the plug 15 is formed with a rounded surface, and the plug 15 is adapted to be snap-fitted with the opening. When the telescopic cylinder 14 is started, the telescopic cylinder 14 pulls the plug 15 upward to fit the opening, so as to seal the bottom of the collection box 5. When the telescopic cylinder 14 pulls the plug 15 downward to leave the opening, it is convenient for the collection box 5 to discharge the adsorbent collected inside.

[0026] Preferably, Figure 1 As shown, a plurality of breaking rods 11 are glued and connected to the inner wall of the absorption chamber 9. The breaking rods 11 are elastic cylindrical rods, and the breaking rods 11 can prevent the adsorbent from agglomerating.

[0027] Working principle: When in use, the power supply at the input end of the pre-filter device is turned on, the access pipe 21 is connected to the external pipeline for conveying mercury-containing flue gas, and the mercury-containing flue gas is passed into the interior of the primary filter chamber 18. In the process of the flue gas rising, it is fully in contact with the long spiral activated carbon adsorption plate 19, which can preliminarily filter the mercury-containing flue gas and reduce the mercury content in the flue gas. The activated carbon adsorption plate 19 can be disassembled and replaced. The mercury-containing flue gas after preliminary filtration further enters the exhaust fan 16 through the connecting pipe 17. The exhaust fan 16 passes the flue gas into the absorption chamber 9, and the lifting pump 13 is started. The lifting pump 13 can lift the adsorbent in the adsorbent tank 6 into the absorption chamber 9 through the lifting pipe 12. After the adsorbent enters the absorption chamber 9, it can be broken up by the breaking rod 11, thereby increasing the contact area with the mercury-containing flue gas. On the other hand, the continuously rotating stirring paddle 10 can break up and stir the adsorbent in the absorption chamber 9 for many times, so that the adsorbent is fully in contact with the mercury-containing flue gas, thereby improving the adsorption strength of the adsorbent on the mercury-containing flue gas.

[0028] 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.

[0029] 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. A mercury-containing flue gas pre-filter device, comprising a base (1) and a bottom plate (20), characterized in that: A collecting box (5) and an adsorbent tank (6) are fixed to the top of the base (1) via a bracket (4); the top of the collecting box (5) is connected to an absorption chamber (9) via a flow guide pipe (7); the top of the adsorbent tank (6) is connected to a lifting pipe (12) via a lifting pump (13); the lifting pipe (12) lifts the adsorbent in the adsorbent tank (6) to the absorption chamber (9); a solenoid valve (8) is installed on the surface of the flow guide pipe (7); a stirring paddle (10) is installed through the inside of the absorption chamber (9); a primary filtering structure is welded to the top of the bottom plate (20); a pumping structure is detachably connected to the top of the primary filtering structure; a side of the pumping structure is connected to the absorption chamber (9); and a lower end of the primary filtering structure is connected to an access pipe (21).

2. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: A counterweight block (2) is welded to the bottom of the base (1); the counterweight block (2) is a truncated cone with a radial bottom end; a connecting block (3) with a threaded hole is welded to the side of the counterweight block (2).

3. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: A conical cavity (51) is welded to the bottom of the collection box (5); the conical cavity (51) is a hollow conical tube with a closed lower end; an opening is provided through the bottom of the conical cavity (51).

4. The mercury-containing flue gas pre-filter device according to claim 3, characterized in that: A telescopic cylinder (14) is fixedly passed through the interior of the base (1), and a plug (15) made of a rubber material is connected to the top of the telescopic cylinder (14). The top of the plug (15) is formed with a rounded surface, and the plug (15) is snap-fitted with the opening.

5. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: One end of the stirring paddle (10) is connected to a motor. The stirring paddle (10) comprises a plurality of hard plates arranged at equal intervals. The width of the stirring paddle (10) is equal to the width of the absorption chamber (9).

6. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: A plurality of breaking rods (11) are glued and connected to the inner wall of the absorption chamber (9), and the breaking rods (11) are elastic cylindrical rods.

7. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: The primary filtering structure comprises a primary filtering chamber (18) and an activated carbon adsorption plate (19); the activated carbon adsorption plate (19) is detachably snap-connected to the interior of the primary filtering chamber (18); the activated carbon adsorption plate (19) is a long spiral activated carbon particle plate; and a chamber door (181) is snap-connected to the surface of the primary filtering chamber (18).

8. The mercury-containing flue gas pre-filter device according to claim 1, characterized in that: The exhaust structure comprises a connecting pipe (17) and an exhaust fan (16); the connecting pipe (17) is connected to the exhaust fan (16) by welding, and the exhaust fan (16) is connected to the absorption chamber (9) through a through-hole.

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