CN216677565U

CN216677565U - Kiln flue gas treatment equipment

Info

Publication number: CN216677565U
Application number: CN202122853191.4U
Authority: CN
Inventors: 邝江华; 陈芳斌
Original assignee: Hunan Chenzhou Mining Industry Co ltd
Current assignee: Hunan Chenzhou Mining Industry Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-06-07
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses a kiln flue gas treatment device, which is used for realizing that the negative pressure of each flue after a plurality of flues are combined meets the requirement of the working condition of a kiln. Therefore, the kiln flue gas treatment equipment provided by the embodiment of the utility model comprises an exhaust fan, a dust remover, a settling cabinet and a PLC control cabinet, wherein the exhaust fan, the dust remover and the settling cabinet are sequentially connected through a treatment flue, a plurality of flue gas exhaust pipelines of a kiln are all communicated with the settling cabinet, a differential pressure transmitter and an adjusting valve are sequentially arranged on each flue gas exhaust pipeline along the flow direction of flue gas, the adjusting valve and the differential pressure transmitter on each flue gas exhaust pipeline are electrically connected with the PLC control cabinet, and the PLC control cabinet is electrically connected with the exhaust fan.

Description

Kiln flue gas treatment equipment

Technical Field

The utility model belongs to the technical field of flue gas treatment, and particularly relates to kiln flue gas treatment equipment.

Background

In order to save investment and facilitate centralized management, enterprises generally adopt a plurality of small furnaces to combine and enter one process dust collection and share one set of air draft system or flue gas treatment equipment for process dust collection and air draft system or flue gas treatment of the small furnaces such as reverberatory furnaces or boilers in the technical fields of metallurgy and chemical industry. After the flues are combined, the negative pressure of each flue is distributed unevenly due to different flue lengths, and the phenomenon of serious uneven distribution of the negative pressure can occur due to the conditions of different working procedure operations among furnaces, scaling of the flues and the like, so that the normal operation of the furnaces is seriously influenced.

Disclosure of Invention

The utility model mainly aims to provide kiln flue gas treatment equipment so as to realize that the negative pressure of each flue after multiple flues are combined meets the requirement of the working condition of a kiln.

Therefore, the kiln flue gas treatment equipment provided by the embodiment of the utility model comprises an exhaust fan, a dust remover, a settling cabinet and a PLC control cabinet, wherein the exhaust fan, the dust remover and the settling cabinet are sequentially connected through a treatment flue, a plurality of flue gas exhaust pipelines of a kiln are all communicated with the settling cabinet, a differential pressure transmitter and an adjusting valve are sequentially arranged on each flue gas exhaust pipeline along the flow direction of flue gas, the adjusting valve and the differential pressure transmitter on each flue gas exhaust pipeline are electrically connected with the PLC control cabinet, and the PLC control cabinet is electrically connected with the exhaust fan.

Specifically, the exhaust fan adopts a variable frequency fan.

Specifically, the regulating valve is an electric regulating valve or a pneumatic regulating valve.

Specifically, the furnace kiln is a reverberatory furnace or a boiler.

Specifically, the dust remover adopts a pulse bag dust remover.

Specifically, the smoke exhaust pipeline is also provided with a heat exchanger.

Compared with the prior art, at least one embodiment of the utility model has the following beneficial effects: all be equipped with differential pressure transmitter and governing valve on the exhaust pipe of every stove, the PLC switch board corresponds the aperture of governing valve and the rotational speed of air exhauster on the exhaust pipe according to differential pressure transmitter's feedback result control, and then realizes the regulation of the interior airflow pressure of exhaust pipe, and whole processing equipment not only can realize the unified of a plurality of kiln flue gases and handle, can guarantee moreover that the negative pressure of each exhaust pipe satisfies the operating mode requirement that corresponds the stove.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a kiln flue gas treatment device provided by an embodiment of the utility model;

FIG. 2 is a partial schematic view of a kiln flue gas treatment device provided by an embodiment of the utility model;

wherein: 1. a differential pressure transmitter; 2. adjusting a valve; 3. a PLC control cabinet; 4. a settling tank; 5. a smoke exhaust duct; 6. treating the flue; 7. a dust remover; 8. an exhaust fan; 9. and a variable frequency controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, 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 utility model 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 utility model.

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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 and 2, a kiln flue gas treatment facility, including air exhauster 8, dust remover 7, subside cabinet 4 and PLC switch board 3, air exhauster 8, dust remover 7, subside cabinet 4 and connect in order through handling flue 6, the exhaust pipe 5 of a plurality of kilns all communicates with subside cabinet 4, all be equipped with differential pressure transmitter 1 and governing valve 2 along the flue gas flow direction on every exhaust pipe 5 in proper order, governing valve 2 and differential pressure transmitter 1 on every exhaust pipe 5 all with PLC switch board 3 electric connection,

PLC switch board

3 and 8 electric connection of air exhauster.

The working process of the kiln flue gas treatment equipment with the structure is as follows: under the action of the exhaust fan 8, the flue gas in the kiln is converged and settled through the settling cabinet 4, enters the dust remover 7 for dust removal and purification treatment, and is finally discharged from the treatment flue 6, because the differential pressure transmitter 1 and the regulating valve 2 are arranged on the exhaust pipeline 5 of each kiln, when the airflow pressure detected by the differential pressure transmitter 1 on a certain exhaust pipeline 5 exceeds the range of the requirements of the working conditions of the corresponding kiln, the PLC control cabinet 3 adjusts the opening of the regulating valve 2 on the exhaust pipeline 5 and/or the rotating speed of the exhaust fan 8 according to the feedback result of the differential pressure transmitter 1 until the airflow pressure in the exhaust pipeline 5 meets the requirements of the working conditions of the kiln, the whole set of treatment equipment can realize the unified treatment of the flue gas of a plurality of kilns, and can automatically adjust the negative pressure of the flue to meet the requirements of the working conditions of the kilns.

Specifically, the air exhauster 8 can adopt the frequency conversion fan, PLC switch board 3 and the frequency conversion controller 9 electric connection of frequency conversion fan, and governing valve 2 can adopt electrical control valve, and the stove is reverberatory furnace or boiler, and dust remover 7 can adopt pulse bag dust remover 7. In addition, a heat exchanger can be arranged on the smoke exhaust pipeline 5, and heat exchange is carried out between the heat exchanger and smoke in the smoke exhaust pipeline 5, so that the recycling of smoke waste heat is realized. Of course, the control valve 2 may be a pneumatic control valve.

Referring to fig. 1 and 2, the flue negative pressure adjusting process will be described in detail below by taking three kilns as examples:

firstly, when the negative pressure of the smoke exhaust pipeline A is lower than the set lowest negative pressure value and the smoke exhaust pipeline B, C is higher than the highest negative pressure value, the PLC control cabinet 3 automatically controls the regulating valve 2 on the smoke exhaust pipeline A to be opened slowly and the regulating valve 2 on the smoke exhaust pipeline B, C to be closed slowly, and controls the negative pressure of the smoke exhaust pipeline A, B, C to be between the highest negative pressure value and the lowest negative pressure value; when the negative pressure of the smoke exhaust pipeline A, B is lower than the set lowest negative pressure value and the smoke exhaust pipeline C is higher than the highest negative pressure value, the PLC control cabinet 3 automatically controls the regulating valve 2 on the smoke exhaust pipeline A, B to be opened slowly and the regulating valve 2 on the smoke exhaust pipeline C to be closed slowly, and controls the negative pressure of the smoke exhaust pipeline A, B, C to be between the highest negative pressure value and the lowest negative pressure value; when the negative pressure of the smoke exhaust pipeline A, B, C is lower than the set lowest negative pressure value, the PLC control cabinet 3 automatically controls the variable frequency control cabinet of the exhaust fan 8 to slowly increase the frequency of the exhaust fan 8, and controls the negative pressure of the smoke exhaust pipeline A, B, C to be between the highest negative pressure value and the lowest negative pressure value; when the negative pressure of the smoke exhaust pipeline A is lower than the set lowest negative pressure value and the negative pressure of the smoke exhaust pipeline B, C is between the highest negative pressure value and the lowest negative pressure value, the PLC control cabinet 3 automatically controls the variable frequency control cabinet of the exhaust fan 8 to slowly increase the frequency of the exhaust fan 8, control the regulating valve 2 on the smoke exhaust pipeline A to slowly open and close, control the regulating valve 2 on the smoke exhaust pipeline B, C to slowly close, and control the negative pressure of the smoke exhaust pipeline A, B, C between the highest negative pressure value and the lowest negative pressure value; when the negative pressure of the smoke exhaust pipeline A, B is lower than the set lowest negative pressure value and the negative pressure of the smoke exhaust pipeline C is between the highest negative pressure value and the lowest negative pressure value, the PLC control cabinet 3 automatically controls the variable-frequency control cabinet of the exhaust fan 8 to slowly increase the frequency of the exhaust fan 8, controls the regulating valve 2 on the smoke exhaust pipeline A, B to slowly open, controls the regulating valve 2 on the smoke exhaust pipeline C to slowly close, and controls the negative pressure of the smoke exhaust pipeline A, B, C to be between the highest negative pressure value and the lowest negative pressure value.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

Meanwhile, if the utility model as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts may be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the scope of the utility model.

Claims

1. A kiln flue gas treatment device is characterized in that: including air exhauster (8), dust remover (7), subside cabinet (4) and PLC switch board (3), air exhauster (8), dust remover (7), subside cabinet (4) are connected in order through handling flue (6), the exhaust pipe (5) of a plurality of kilns all with subside cabinet (4) intercommunication, every all be equipped with differential pressure transmitter (1) and governing valve (2) along flue gas flow direction on exhaust pipe (5) in proper order, every on exhaust pipe (5) governing valve (2) and differential pressure transmitter (1) all with PLC switch board (3) electric connection, PLC switch board (3) with air exhauster (8) electric connection.

2. The kiln flue gas treatment device according to claim 1, characterized in that: the exhaust fan (8) adopts a variable frequency fan.

3. The kiln flue gas treatment device according to claim 1, characterized in that: the regulating valve (2) adopts an electric regulating valve or a pneumatic regulating valve.

4. The kiln flue gas treatment device according to claim 1, characterized in that: the furnace kiln is a reverberatory furnace or a boiler.

5. The kiln flue gas treatment device according to claim 1, characterized in that: the dust remover (7) adopts a pulse bag dust remover.

6. The kiln flue gas treatment device according to claim 1, characterized in that: and the smoke exhaust pipeline (5) is also provided with a heat exchanger.