CN209952564U

CN209952564U - Desulfurization, denitrification and dust removal integrated device for cement kiln

Info

Publication number: CN209952564U
Application number: CN201920522820.5U
Authority: CN
Inventors: 李传永
Original assignee: Mikkeli Technology (beijing) Co Ltd
Current assignee: Mikkeli Technology (beijing) Co Ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2020-01-17
Anticipated expiration: 2029-04-17

Abstract

The application discloses cement kiln SOx/NOx control dust removal integrated device relates to the environmental protection field. The integrated device for desulfurization, denitrification and dust removal of the cement kiln is arranged between a preheater and a chimney and comprises the following components in the flowing direction of flue gas: the system comprises a dry desulfurization device, a denitration agent doser, a denitration and dust removal integrated device and a waste heat boiler which are sequentially arranged and connected through pipelines. The dry desulfurization device is used for desulfurizing the flue gas through the desulfurization powder. Denitration agent doser is used for spraying denitration agent in the pipeline. The denitration and dust removal integrated device is used for denitration and dust removal of flue gas. The waste heat boiler is used for recovering heat in the flue gas. The dry desulfurization device is used for desulfurization, so that the occupied area is reduced, and the spraying and cooling process is omitted, thereby saving energy consumption. And no sludge or sewage is generated in the dry desulfurization process, so that the pollution is reduced. Because no white smoke is generated in the treatment process, the white removal treatment is not needed, so that the process is simplified. The heat energy is recovered through the waste heat boiler, and the energy is fully utilized.

Description

Desulfurization, denitrification and dust removal integrated device for cement kiln

Technical Field

The application relates to the field of environmental protection, especially relates to a cement kiln SOx/NOx control dust removal integrated device.

Background

The combustion of coal dust and the calcination of clinker in a cement kiln can generate a large amount of smoke accompanied by dust particles and SO₂、NO_XAnd pollutants such as fluoride and the like, which can cause various adverse effects on the social ecological environment and the health of people, and more strict control indexes have been proposed for the country.

At present, most manufacturers arrange a desulfurization and dust removal device between a preheater and a chimney in a cement kiln to complete desulfurization and dust removal. The flue gas is cooled by a preheater through a water spraying device and a humidifying tower, dedusted by a deduster, desulfurized by a wet desulphurization device, and then discharged by a chimney.

The wet desulphurization dedusting device has large occupied area, high energy consumption due to spray cooling in the treatment process, new pollution caused by incapability of treating generated sludge and sewage, complex whitening treatment process for generating white smoke by using water vapor generated in the evaporation process, and waste of heat energy due to direct discharge of the water vapor.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.

The application provides a cement kiln SOx/NOx control dust removal integrated device sets up between pre-heater and chimney, includes according to flue gas flow direction: arranged in series and connected by conduits

The dry desulfurization device is used for desulfurizing the flue gas by the desulfurization powder;

the denitration agent doser is used for spraying a denitration agent into the pipeline;

the denitration and dust removal integrated device is used for performing denitration and dust removal on the flue gas; and

and the waste heat boiler is used for recovering heat in the flue gas.

Optionally, dry desulfurization device includes desulfurizer storehouse, screw conveyer and has the draught fan of tripe governing valve, screw conveyer sets up the below in desulfurizer storehouse, screw conveyer's end-to-end connection is to the pipeline, the draught fan setting that has the tripe governing valve is in screw conveyer's front end and link to each other with the pipeline, the desulfurizer warp the desulfurizer storehouse with screw conveyer carries to the pipeline, the draught fan that has the tripe governing valve introduce the pipeline with the flue gas with the desulfurizer mixes.

Optionally, denitration dust removal integrated device includes casing, installed part, blowback device and denitration dust removal ceramic filter core, the casing has air inlet and gas outlet, the installed part is installed inside the casing, denitration dust removal ceramic filter core is installed part department, the blowback device install the casing outside and with the casing intercommunication, the blowback device is used for blowing off attached to the dust of denitration dust removal ceramic filter core department.

Optionally, the denitration dust removal ceramic filter element is a high-temperature-resistant denitration dust removal ceramic filter element.

Optionally, the integrated device for desulfurization, denitrification and dust removal of the cement kiln further comprises a cyclone dust removal device, which is arranged behind the dry desulfurization device and in front of the integrated device for desulfurization, denitrification and dust removal and is used for removing dust in flue gas and recovering a desulfurizer.

Optionally, the cyclone dust removal device comprises a cyclone, a screw conveyor of the cyclone dust removal device and a desulfurization bin in the order from top to bottom.

The utility model provides a cement kiln SOx/NOx control dust removal integrated device, through the desulfurization of dry process desulphurization unit, owing to it need not to use water jet equipment and humidification tower, not only reduced area, saved moreover and sprayed the cooling process, energy saving consumes from this. And no sludge or sewage is generated in the dry desulfurization process, so that the pollution is reduced. Because no white smoke is generated in the treatment process, the white removal treatment is not needed, so that the process is simplified. The heat energy is recovered through the waste heat boiler, and the energy is fully utilized.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural diagram of a desulfurization, denitrification and dust removal integrated device of a cement kiln according to one embodiment of the present application;

FIG. 2 is a schematic structural view of the denitration and dedusting integrated apparatus shown in FIG. 1.

The symbols in the drawings represent the following meanings:

100 a desulfurization, denitrification and dust removal integrated device of a cement kiln,

1 a preheater, 2 a chimney,

10 dry desulphurization device, 11 desulfurizer bin, 12 screw conveyer, 13 induced draft fan with shutter adjusting valve,

20 denitration and dust removal integrated device, 21 shell, 22 mounting piece, 23 back-blowing device, 24 denitration and dust removal ceramic filter element, 25 air inlet, 26 air outlet, 27 denitration agent doser,

30 a waste heat boiler, wherein the waste heat boiler is arranged in the waste heat boiler,

40 cyclone dust removing devices, 41 cyclones, 42 spiral conveyers of the cyclone dust removing devices and 43 desulfurization bins.

Detailed Description

Fig. 1 is a schematic structural view of a cement kiln desulfurization, denitrification, and dust removal integrated apparatus 100 according to an embodiment of the present application. The utility model provides a cement kiln SOx/NOx control dust removal integrated device 100, sets up between pre-heater 1 and chimney 2, includes according to the flue gas flow direction: the system comprises a dry desulfurization device 10, a denitration agent doser 27, a denitration and dust removal integrated device 20 and a waste heat boiler 30 which are sequentially arranged and connected through pipelines. The dry desulfurization device 10 is used for desulfurizing flue gas by desulfurization powder. Denitration agent doser 27 is used for spraying denitration agent to the pipeline. The denitration and dust removal integrated device 20 is used for denitration and dust removal of flue gas. The exhaust heat boiler 30 is used for recovering heat in the flue gas.

Wherein, dry desulfurization device 10, denitrifier doser 27, denitration dust removal integrated device 20 and exhaust-heat boiler 30 are prior art.

The utility model provides a cement kiln SOx/NOx control dust removal integrated device 100, through the desulfurization of dry desulphurization unit 10, owing to need not to use water jet equipment and humidification tower, not only reduced area, saved moreover and sprayed the cooling process, energy saving consumes from this. And no sludge or sewage is generated in the dry desulfurization process, so that the pollution is reduced. Because no white smoke is generated in the treatment process, the white removal treatment is not needed, so that the process is simplified. The heat energy is recovered by the exhaust-heat boiler 30, and the energy is fully utilized.

As shown in fig. 1, in this embodiment, dry desulfurization device 10 includes desulfurizer storehouse 11, screw conveyer 12 and draught fan 13 that has the tripe governing valve, screw conveyer 12 sets up the below in desulfurizer storehouse 11, screw conveyer 12's end-to-end connection is to the pipeline, draught fan 13 that has the tripe governing valve sets up screw conveyer 12's front end and link to each other with the pipeline, the desulfurizer warp desulfurizer storehouse 11 with screw conveyer 12 carries to the pipeline, draught fan 13 that has the tripe governing valve introduce the pipeline with the flue gas the desulfurizer mixes.

FIG. 2 is a schematic structural view of the denitration and dedusting integrated apparatus shown in FIG. 1. In this embodiment, the denitration and dust removal integrated device 20 may generally include a housing 21, a mounting member 22, a blowback device 23, and a denitration and dust removal ceramic filter element 24. The housing 21 has an air inlet 25 and an air outlet 26. The mounting member 22 is mounted inside the housing 21. The denitration dust removal ceramic filter element 24 is installed at the installation member 22. The back blowing device 23 is installed outside the housing 21 and is communicated with the housing 21, and the back blowing device 23 is used for blowing off dust attached to the denitration dust-removal ceramic filter element 24.

Referring to fig. 2, in the present embodiment, the denitration dust-removal ceramic filter element 24 is a high temperature resistant denitration dust-removal ceramic filter element. Wherein, high temperature resistant denitration dust removal ceramic filter core is prior art. The invention application is filed by referring to the applicant, has published application date of 2018-11-20 and application number of 2018113854978 and is named as a high-temperature-resistant denitration dedusting ceramic filter element and an exhaust gas purification device.

The utility model provides a high temperature resistant denitration dust removal ceramic filter core, because high temperature resistant denitration dust removal ceramic filter core configures to the shape structure that can improve filter core filter area to improved unit volume filter area, and then improved the filter area of the exhaust gas purification device who has high temperature resistant denitration dust removal ceramic filter core, strengthened exhaust gas purification device's filtration efficiency.

As shown in fig. 1, the integrated desulfurization, denitrification and dedusting device 100 of the cement kiln further comprises a cyclone dust collector 40, which is arranged behind the dry desulfurization device 10 and in front of the integrated desulfurization, denitrification and dedusting device 20, and is used for removing dust in flue gas, so as to avoid an excessive dedusting load of the integrated desulfurization, denitrification and dedusting device 20, and also used for recovering a desulfurizing agent, so as to recycle the desulfurizing agent. Wherein, the cyclone dust removing device 40 is the prior art.

More specifically, in the present embodiment, the cyclone dust removing device 40 includes a cyclone 41, a screw conveyor 42 of the cyclone dust removing device, and a desulfurization bin 43 in order from top to bottom.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second", etc. 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. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a cement kiln SOx/NOx control dust removal integrated device (100), sets up between pre-heater (1) and chimney (2), and its characterized in that includes according to flue gas flow direction: arranged in series and connected by conduits

A dry desulfurization device (10) for desulfurizing the flue gas by the desulfurization powder;

the denitration agent doser (27) is used for spraying a denitration agent into the pipeline;

the denitration and dust removal integrated device (20) is used for performing denitration and dust removal on the flue gas; and

and the waste heat boiler (30) is used for recovering heat in the flue gas.

2. The integrated desulfurization, denitrification and dedusting device for the cement kiln as recited in claim 1, wherein the dry desulfurization device (10) comprises a desulfurizer bin (11), a screw conveyor (12) and an induced draft fan (13) with a shutter regulating valve, the screw conveyor is arranged below the desulfurizer bin, the end of the screw conveyor is connected to the pipeline, the induced draft fan with the shutter regulating valve is arranged at the front end of the screw conveyor and is connected with the pipeline, the desulfurizer passes through the desulfurizer bin and is conveyed to the pipeline by the screw conveyor, and the induced draft fan with the shutter regulating valve introduces flue gas into the pipeline and mixes with the desulfurizer.

3. The integrated desulfurization, denitrification and dust removal device for cement kilns as recited in claim 1, wherein said integrated desulfurization, denitrification and dust removal device (20) comprises a housing (21), a mounting member (22), a blowback device (23) and a ceramic denitration and dust removal filter element (24), said housing (21) having an air inlet (25) and an air outlet (26), said mounting member being mounted inside said housing, said ceramic denitration and dust removal filter element being mounted at said mounting member, said blowback device being mounted outside said housing and communicating with said housing, said blowback device being configured to blow off dust attached at said ceramic denitration and dust removal filter element.

4. The integrated desulfurization, denitrification and dedusting device for the cement kiln according to claim 3, wherein the denitration and dedusting ceramic filter element (24) is a high-temperature-resistant denitration and dedusting ceramic filter element.

5. The integrated desulfurization, denitrification and dedusting device for the cement kiln according to any one of claims 1-4, further comprising a cyclone dedusting device (40) which is arranged after the dry desulfurization device and before the integrated desulfurization, denitrification and dedusting device and is used for removing dust in flue gas and recovering desulfurizer.

6. The integrated desulfurization, denitrification and dedusting device for the cement kiln as recited in claim 5, wherein the cyclone dedusting device (40) comprises a cyclone (41), a screw conveyor (42) of the cyclone dedusting device and a desulfurization bin (43) in the order from top to bottom.