CN215863498U

CN215863498U - Preheating furnace capable of being switched and used on line

Info

Publication number: CN215863498U
Application number: CN202122489397.3U
Authority: CN
Inventors: 童敏; 卓神龙; 何流; 刘林; 刘才华
Original assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Current assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-02-18
Anticipated expiration: 2031-10-15

Abstract

The utility model discloses a preheating furnace capable of being used in an online reversing manner, which comprises a preheating furnace body, wherein an air inlet pipe and an air outlet pipe are connected to the preheating furnace body, a bypass pipe is connected between the air inlet pipe and the air outlet pipe, a first valve group is installed on the air inlet pipe, a second valve group is installed on the air outlet pipe, a third valve group is installed on the bypass pipe, the air inlet pipe comprises a first air inlet pipe which is connected with the preheating furnace body and is transversely arranged, a second air inlet pipe which is connected with the first air inlet pipe and is vertically arranged, and the air outlet pipe comprises a first air outlet pipe which is connected with the preheating furnace body and is transversely arranged, and a second air outlet pipe which is connected with the first air outlet pipe and is vertically arranged. The utility model replaces the original manual blind plate operation with the operation of a central control room on the on-site valve, thereby reducing the safety risk of operators. Meanwhile, if the preheating furnace breaks down, the hidden danger of shutdown disposal of a sintering system is not needed, and the sintering downtime is greatly reduced.

Description

Preheating furnace capable of being switched and used on line

Technical Field

The utility model relates to the technical field of preheating furnaces, in particular to a preheating furnace capable of being switched and used on line.

Background

The preheating furnace is used for exchanging heat in high-temperature flue gas of a heating furnace by passing low-quality fuel (mainly low-calorific-value fuel such as blast furnace gas, hot gas, tail gas and the like) or air through a heat exchanger, so that the temperature of the low-quality fuel or air is increased to 900 ℃ generally to 300-. Thereby improving the actual combustion temperature of the inferior fuel or the sensible heat of air, achieving the high-temperature calcination or other processes of the inferior fuel, and further replacing the high-quality fuel.

After being heated to 80 ℃ by the preheating furnace, the coal gas is sent to the ignition furnace through a coal gas pipeline to begin to roast the sintering ore, and if the preheating furnace fails, the machine needs to be stopped for maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a preheating furnace capable of being used in an online reversing manner, and when the preheating furnace has problems and needs to be overhauled, a pipeline for conveying coal gas can bypass the preheating furnace.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a preheater that can rearrange on line and use, includes the preheater body, be connected with intake pipe and outlet duct on the preheater body, be connected with the bypass pipe between intake pipe and the outlet duct, install first valve group in the intake pipe, install second valve group on the outlet duct, install third valve group on the bypass pipe. The principle of the utility model is that the gas can be used even without preheating by a preheating furnace, but the lower heat value can cause insufficient combustion, but the loss is much smaller compared with stopping. Therefore, the utility model realizes the non-stop maintenance by arranging the by-pass pipe and enabling the pipeline to bypass the preheating furnace when the preheating furnace is in failure and needs to be maintained.

Furthermore, the air inlet pipe comprises a first air inlet pipe which is connected with the preheating furnace body and transversely arranged and a second air inlet pipe which is connected with the first air inlet pipe and vertically arranged, and the air outlet pipe comprises a first air outlet pipe which is connected with the preheating furnace body and transversely arranged and a second air outlet pipe which is connected with the first air outlet pipe and vertically arranged.

Furthermore, the bypass pipe is arranged between the second air inlet pipe and the second air outlet pipe, so that bent pipes are reduced as much as possible, and air pressure loss is avoided.

Furthermore, the first valve group is positioned on the first air inlet pipe, and the second valve group is positioned on the first air outlet pipe.

Further, the first, second and third valve sets each include at least one butterfly valve and one glasses valve.

Furthermore, the valve system also comprises a controller, and the first valve group, the second valve group and the third valve group are all connected with the controller. The remote control can be realized to the valve group, avoid artifical on-the-spot switch, reduce workman's intensity of labour, improve the security.

Furthermore, the preheating furnace body comprises an outer shell and an inner shell which are sleeved with each other, a coal gas cavity is arranged between the outer shell and the inner shell, a hot air cavity is arranged inside the inner shell, the air inlet pipe and the air outlet pipe are connected with the coal gas cavity, and the hot air cavity is connected with a hot air circulating pipe.

Compared with the prior art, the utility model has the beneficial effects that: the preheating furnace with the structure is provided with the by-pass pipe between the input and output pipelines in front of the preheating furnace, so that when the preheating furnace breaks down, coal gas can be directly used without passing through the preheating furnace, shutdown maintenance is avoided, and the economic benefit of a factory is improved.

Drawings

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

FIG. 2 is a sectional view of a preheating furnace body in the present invention;

in the figure: 1. a preheating furnace body; 2. an air inlet pipe; 3. an air outlet pipe; 4. a bypass pipe; 5. a first valve group; 6. a second valve group; 7. a third valve group; 11. a housing; 12. an inner shell; 13. a gas cavity; 14. a hot air chamber; 21. a first intake pipe; 22. a second intake pipe; 31. a first air outlet pipe; 32. and a second air outlet pipe.

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.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a preheater technical scheme that can change use on line, includes preheater body 1, is connected with intake pipe 2 and outlet duct 3 on the preheater body 1, is connected with bypass pipe 4 between intake pipe 2 and the outlet duct 3, installs first valve group 5 in the intake pipe 2, installs second valve group 6 on the outlet duct 3, installs third valve group 7 on the bypass pipe 4.

Further, the air inlet pipe 2 comprises a first air inlet pipe 21 which is connected with the preheating furnace body 1 and is transversely arranged and a second air inlet pipe 22 which is connected with the first air inlet pipe 21 and is vertically arranged, and the air outlet pipe 3 comprises a first air outlet pipe 31 which is connected with the preheating furnace body 1 and is transversely arranged and a second air outlet pipe 32 which is connected with the first air outlet pipe 31 and is vertically arranged.

Further, a bypass pipe 4 is provided between the second intake pipe 22 and the second outlet pipe 32.

Further, the first valve set 5 is located on the first air inlet pipe 21, and the second valve set 6 is located on the first air outlet pipe 31.

Further, the first, second and

third valve sets

5, 6, 7 each include at least one butterfly valve and one glasses valve.

Furthermore, the valve system also comprises a controller, and the first valve group 5, the second valve group 6 and the third valve group 7 are connected with the controller.

Further, the preheating furnace body 1 comprises an outer shell 11 and an inner shell 12 which are sleeved with each other, a coal gas cavity 13 is arranged between the outer shell 11 and the inner shell 12, a hot air cavity 14 is arranged inside the inner shell 12, the air inlet pipe 2 and the air outlet pipe 3 are connected with the coal gas cavity 13, and the hot air cavity 14 is connected with a hot air circulating pipe.

The working principle is as follows: before the preheating furnace body 1 is used, the safety of each structure of the preheating furnace is checked, the opening and closing of the first valve group 5, the second valve group 6 and the third valve group 7 can be controlled remotely through the controller, under normal conditions, the first valve group 5 and the second valve group 6 are controlled to be opened through the controller, the third valve group 7 is closed, if the preheating furnace body 1 fails, the first valve group 5 and the second valve group 6 are controlled to be closed remotely through the controller, and the third valve group 7 is opened, so that online switching can be realized, the hidden danger of shutdown disposal of a sintering system is avoided, and the temporary shutdown time of sintering is greatly reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus, and any standard components found in known art that may be commercially available or commercially available and may be readily customized based on the teachings of the specification and the drawings, and that the particular connection between the various components is by conventional means well known in the art, and that the machine, component, or apparatus is by model and circuit connection is by conventional means well known in the art, and will not be described in detail herein.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a preheater that can rearrange on line and use, includes the preheater body, be connected with intake pipe and outlet duct on the preheater body, its characterized in that: a bypass pipe is connected between the air inlet pipe and the air outlet pipe, a first valve set is installed on the air inlet pipe, a second valve set is installed on the air outlet pipe, and a third valve set is installed on the bypass pipe.

2. The preheating furnace capable of being switched and used online according to claim 1, wherein: the air inlet pipe comprises a first air inlet pipe which is connected with the preheating furnace body and transversely arranged and a second air inlet pipe which is connected with the first air inlet pipe and vertically arranged, and the air outlet pipe comprises a first air outlet pipe which is connected with the preheating furnace body and transversely arranged and a second air outlet pipe which is connected with the first air outlet pipe and vertically arranged.

3. The preheating furnace capable of being switched and used online according to claim 2, wherein: the bypass pipe is arranged between the second air inlet pipe and the second air outlet pipe.

4. The preheating furnace capable of being switched and used online according to claim 2, wherein: the first valve group is positioned on the first air inlet pipe, and the second valve group is positioned on the first air outlet pipe.

5. The preheating furnace capable of being switched and used online according to claim 1, wherein: the first, second and third valve groups each include at least one butterfly valve and a glasses valve.

6. The preheating furnace capable of being switched and used online according to claim 1, wherein: the valve system further comprises a controller, and the first valve group, the second valve group and the third valve group are all located on the controller and connected with the controller.

7. The preheating furnace capable of being switched and used online according to claim 1, wherein: the preheating furnace body comprises an outer shell and an inner shell which are sleeved with each other, a coal gas cavity is arranged between the outer shell and the inner shell, a hot air cavity is arranged inside the inner shell, the air inlet pipe and the air outlet pipe are connected with the coal gas cavity, and the hot air cavity is connected with a hot air circulating pipe.