CN212680588U

CN212680588U - Filter element for removing mercury in coal-fired flue gas

Info

Publication number: CN212680588U
Application number: CN202020551905.9U
Authority: CN
Inventors: 陶君; 谷小兵; 孟磊; 杜明生; 张国柱; 李广利; 白玉勇
Original assignee: Datang Environment Industry Group Co Ltd
Current assignee: Datang Environment Industry Group Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-03-12
Anticipated expiration: 2030-04-15

Abstract

The utility model provides a filter core for removing coal-fired flue gas mercury, which comprises a shell, wherein the inside of the shell is movably provided with a filter core, the outer surface of the shell is wrapped with a sealing ring, the outer surfaces of the upper and lower ends of the shell are respectively provided with an opening, the outer surface of the upper end of the shell is respectively provided with an installation notch, the shell wraps the outer surfaces of the four and upper and lower ends of the filter core, the filter core for removing the coal-fired flue gas mercury is convenient to install and disassemble, meanwhile, the sealing performance between the filter core and a packed tower is stronger, the friction force between the filter core and the tower wall is increased by adopting a spiral sealing ring, the filter core is not easy to fall off in the using process, the problems that the price of an active carbon adsorbent is high, the adsorbent affects the secondary utilization of fly ash, the secondary release of mercury in the subsequent fly ash utilization process and, and the secondary utilization of the fly ash is not influenced, and the secondary release of mercury can be effectively prevented.

Description

Filter element for removing mercury in coal-fired flue gas

Technical Field

The utility model belongs to the technical field of coal-fired flue gas purification treatment technique and specifically relates to a filter core for desorption coal-fired flue gas mercury is related to.

Background

Mercury is the fourth largest coal-fired flue gas pollutant after dust, SOx and NOx, and the release of mercury becomes an important environmental pollution problem with serious threat to human health due to the fact that mercury has high toxicity, easy mobility, biological richness and high concealment, and at the present stage, artificial mercury pollution mainly comes from a coal-fired boiler;

among the demercuration technologies, the activated carbon injection technology is considered to be the flue gas demercuration technology with the best industrial application prospect, the technology mainly takes coal-based activated carbon as an adsorbent, the coal-based activated carbon is injected into a flue between an air preheater and a dust remover, the adsorbent is used for adsorbing mercury in flue gas, the adsorbent after adsorbing mercury is removed by the dust remover, and finally the adsorbent enters fly ash collected by the dust remover;

the activated carbon injection technology has higher mercury removal efficiency, but also has more obvious defects. Firstly, the price of the activated carbon is high, so that the operation cost of the method is too high, and the economic benefit of a power plant is adversely affected; secondly, the activated carbon adopted by the technology can enter the fly ash collected by the dust remover at last, the secondary utilization of the fly ash can be seriously influenced, and the danger of secondary release of mercury in the subsequent fly ash utilization process also exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a filter core for desorption coal-fired flue gas mercury, this a filter core for desorption coal-fired flue gas mercury, convenient to install and dismantle, simultaneously and the leakproofness between the packed tower stronger, adopt spiral sealing ring increase and tower wall between the frictional force, be difficult for droing in the use, the active carbon adsorbent that exists among the solution prior art is expensive, the adsorbent influences flying dust reutilization, and follow-up flying dust utilizes the secondary release scheduling problem of in-process mercury, when guaranteeing demercuration efficiency, the running cost is reduced, and do not influence the reutilization of flying dust, and can effectively prevent the secondary release of mercury.

The utility model provides a filter core for desorption fires coal gas mercury, which comprises a housin, the inside movable mounting of casing has the filter core, and the surface parcel of casing has the sealing ring, the opening has all been seted up to the upper and lower both ends surface of casing, the installation notch has all been seted up all around to the upper end surface of casing.

Preferably, the shell wraps the outer surfaces of the periphery, the upper end and the lower end of the filter element.

Wrap up the filter core through the casing, strengthen the leakproofness between filter core and the tower wall, improve the filter effect.

Preferably, the material of the filter element is ceramic foam made of alumina.

The ceramic foam is high temperature resistant, the pore size is small, the filtering effect is more excellent, and meanwhile, the price is low, and the cost can be reduced.

Preferably, the filter element is soaked in a mixed solution of sulfhydryl fatty acid, acetic anhydride and concentrated sulfuric acid, washed to be neutral by deionized water and then air-dried.

The filter element is modified by using a mixed solution of sulfhydryl fatty acid, acetic anhydride and concentrated sulfuric acid, the surface of the modified filter element contains rich sulfhydryl functional groups, and the sulfhydryl functional groups can form a very stable complex with mercury in flue gas, so that the mercury in the flue gas can be efficiently removed.

Preferably, the sealing ring is helical.

The spiral sealing ring increases the one-way friction force between the filter element and the tower wall, and the filter element and the tower wall can not fall off due to the thrust of smoke in the using process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a view of the casing and the mounting notch of the present invention.

Description of reference numerals:

1. a housing; 2. a filter element; 3. a seal ring; 4. a port; 5. and installing a notch.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 2, the present invention provides a technical solution:

a filter element for removing mercury from coal-fired flue gas comprises a shell 1, wherein a filter element 2 is movably arranged in the shell 1, and the outer surface of the shell 1 is wrapped by a sealing ring 3;

as shown in fig. 2, the outer surfaces of the upper and lower ends of the housing 1 are both provided with through openings 4;

as shown in fig. 3, the periphery of the outer surface of the upper end of the casing 1 is provided with mounting notches 5.

Through adopting above-mentioned technical scheme, wrap up filter core 2 through casing 1, strengthen the leakproofness between filter core 2 and the tower wall, improve the filter effect, spiral helicine sealing ring 3 has increased the one-way frictional force between filter core 2 and the tower wall, can not lead to filter core 2 and tower wall to take place to drop because of the thrust of flue gas in the use, insert the instrument and rotate casing 1 in installation notch 5, rotation through positive and negative, be convenient for install casing 1 to packed column inside and take out, with the mercapto fatty acid, acetic anhydride, the mixed solution of concentrated sulfuric acid is modified

filter core

2, 2 surfaces of filter core after the modification contain abundant mercapto functional group, mercapto functional group can form very stable complex with the mercury in the flue gas, mercury in the high-efficient desorption flue gas.

Specifically, as shown in fig. 2, the housing 1 wraps the outer surfaces of the periphery, the upper end and the lower end of the filter element 2.

Through adopting above-mentioned technical scheme, wrap up filter core 2 through casing 1, strengthen the leakproofness between filter core 2 and the tower wall, improve the filter effect.

Specifically, as shown in fig. 1 and 2, the filter element 2 is made of ceramic foam made of alumina.

Through adopting above-mentioned technical scheme, ceramic foam is high temperature resistant, and the aperture is less, and the filter effect is more excellent, and simultaneously the low price can reduce cost.

Specifically, as shown in fig. 1 and 2, the filter element 2 is soaked in a mixed solution of mercaptofatty acid, acetic anhydride, and concentrated sulfuric acid, washed to be neutral by deionized water, and then air-dried.

By adopting the technical scheme, the filter element 2 is modified by using the mixed solution of the mercapto fatty acid, the acetic anhydride and the concentrated sulfuric acid, the surface of the modified filter element 2 contains rich mercapto functional groups, and the mercapto functional groups can form a very stable complex with mercury in the flue gas, so that the mercury in the flue gas can be efficiently removed.

Specifically, as shown in fig. 1, the seal ring 3 has a spiral shape.

Through adopting above-mentioned technical scheme, spiral helicine sealing ring 3 has increased the one-way frictional force between filter core 2 and the tower wall, can not lead to filter core 2 and tower wall to take place to drop because of the thrust of flue gas in the use.

The working principle is as follows: wrap up filter core 2 through casing 1, strengthen the leakproofness between filter core 2 and the tower wall, improve the filter effect, spiral helicine sealing ring 3 has increased the one-way frictional force between filter core 2 and the tower wall, can not lead to filter core 2 and tower wall to take place to drop because of the thrust of flue gas in the use, insert the instrument and rotate casing 1 in the installation notch 5, rotation through positive and negative, be convenient for install casing 1 to the packed column inside and take out, with the mercapto fatty acid, acetic anhydride, the mixed solution of concentrated sulfuric acid is modified

filter core

The using method comprises the following steps: firstly, mercapto fatty acid, acetic anhydride and concentrated sulfuric acid are prepared into mixed solution according to the volume ratio of (150-.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a filter core for desorption fires coal flue gas mercury, includes casing (1), its characterized in that, the inside movable mounting of casing (1) has filter core (2), and the surface coating of casing (1) has sealing ring (3), opening (4) have all been seted up to the upper and lower both ends surface of casing (1), installation notch (5) have all been seted up all around to the upper end surface of casing (1).

2. The filter element for removing mercury from coal-fired flue gas according to claim 1, wherein the shell (1) covers the outer surfaces of the periphery, the upper end and the lower end of the filter element (2).

3. The filter element for removing mercury from coal-fired flue gas according to claim 1, wherein the material of the filter element (2) is ceramic foam made of alumina.

4. A filter element for removing mercury from coal-fired flue gas according to claim 1, wherein the sealing ring (3) is helical.