High-temperature flue gas pressure adjusting device

Abstract

The utility model relates to a high-temperature flue gas pressure adjusting device which comprises a central control system, a high-temperature pipeline used for conveying high-temperature flue gas, a gas source communicated with the high-temperature pipeline through an air supplementing pipeline, and an adjusting component used for controlling the gas flow of the air supplementing pipeline. The central control system controls the adjusting component by collecting a pressure signal in the high-temperature pipeline, the air source is connected with the high-temperature pipeline through the air supplementing pipeline, and when the central control system collects that the pressure in the high-temperature pipeline needs to be adjusted, the central control system controls the adjusting component to achieve opening and closing of the air supplementing pipeline. Air supplement gas is conveyed in the high-temperature pipeline, then the pressure in the high-temperature pipeline is adjusted, namely, the pressure of the high-temperature pipeline is changed by changing the flue gas flow in the high-temperature pipeline, the purpose of adjusting the pressure needed by production is achieved, a common pressure adjusting device does not need to be used, the service life of the device can be prolonged, and the equipment cost can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas flow regulation technology, and specifically relates to a high-temperature flue gas pressure regulation device. Background Technology

[0002] In industrial production, it is often necessary to regulate and control the pressure of high-temperature flue gas, such as in the high-temperature flue or pipelines of heat recovery coke ovens and hot blast stoves. The flue gas temperature generally exceeds 1000℃, and in some cases even exceeds 1200℃. Commonly used high-temperature flue gas regulating devices include refractory cast valves and valves with water-cooling systems. These valves change the local cross-section of the flue to affect local resistance, thereby regulating the pressure. However, ordinary regulating devices are difficult to operate at these temperatures, and commonly used refractory cast valves are prone to cracking and breakage, resulting in a short service life. Regulating devices with water-cooling systems require an additional water-cooling system, leading to increased equipment costs and operating expenses.

[0003] Therefore, in order to address the above-mentioned technical problems, designing a high-temperature flue gas pressure regulating device to extend its service life and reduce equipment costs is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a high-temperature flue gas pressure regulating device that extends the service life of the pressure regulating device and reduces equipment costs.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A high-temperature flue gas pressure regulating device includes a central control system, a high-temperature pipeline for conveying high-temperature flue gas, a gas source connected to the high-temperature pipeline via a make-up air pipeline, and a regulating component for controlling the gas flow rate of the make-up air pipeline. The central control system controls the regulating component by collecting pressure signals within the high-temperature pipeline.

[0007] Preferably, the high-temperature pipes are configured as two or more.

[0008] Preferably, the high-temperature pipeline is equipped with a pressure measuring device for measuring the pressure of the high-temperature pipeline, and the pressure measuring device is electrically connected to the central control system.

[0009] Preferably, the pressure measuring device is a gas pressure sensor or a barometer.

[0010] Preferably, the air source is connected to the air supply channel via a fan.

[0011] Preferably, the gas source is air, low-temperature flue gas, or nitrogen.

[0012] Preferably, the high-temperature pipeline has a branch pipe at its outlet end, and the branch pipe is connected to the make-up air pipeline.

[0013] Preferably, the fan is electrically connected to the central control system.

[0014] The present invention achieves the following technical advantages over the prior art:

[0015] By connecting the air source to the high-temperature pipeline through the make-up air pipeline, when the central control system detects that the pressure inside the high-temperature pipeline needs to be adjusted, the central control system controls the adjustment components to open and close the make-up air pipeline, thereby delivering make-up air gas into the high-temperature pipeline and adjusting the pressure in the high-temperature pipeline. In other words, by changing the flue gas flow rate in the high-temperature pipeline, the pressure in the high-temperature pipeline is changed, achieving the pressure regulation purpose required for production. This eliminates the need for ordinary pressure regulating devices, extends the service life of the equipment, and reduces equipment costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Appendix Figure 1 This is a schematic diagram of the overall structure of the high-temperature flue gas pressure regulating device disclosed in the embodiment of this utility model.

[0018] The components include: 1. High-temperature pipeline; 2. Pressure measuring device; 3. Adjusting components; 4. Make-up air pipeline; 5. Air source; 6. Central control system; 7. Pressure signal transmission channel; and 8. Control signal transmission channel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The purpose of this invention is to provide a high-temperature flue gas pressure regulating device that extends the service life of the pressure regulating device and reduces equipment costs.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] refer to Figure 1 The high-temperature flue gas pressure regulating component 3 disclosed in this embodiment of the present invention includes at least a central control system 6 and a high-temperature pipeline 1 for conveying high-temperature flue gas. The high-temperature pipeline 1 is connected to a gas source 5 through a make-up air pipeline 4. A regulating component 3 is provided on the make-up air pipeline 4. The regulating component 3 is used to control the flow rate of the gas in the make-up air pipeline 4. The central control system 6 controls the opening and closing of the regulating component 3 by collecting the pressure signal in the high-temperature pipeline 1. The gas source 5 is connected to the high-temperature pipeline 1 through the make-up air pipeline 4. When the central control system 6 detects that the pressure in the high-temperature pipeline 1 needs to be adjusted, the central control system 6 controls the regulating component 3 to realize the opening and closing of the make-up air pipeline 4, so as to convey make-up air gas in the high-temperature pipeline 1 and thereby adjust the pressure in the high-temperature pipeline 1. That is, the pressure in the high-temperature pipeline 1 is changed by changing the flow rate of the flue gas in the high-temperature pipeline 1, so as to achieve the pressure regulation purpose required for production. There is no need to use ordinary pressure regulating devices, which can extend the service life of the device and reduce equipment costs.

[0023] refer to Figure 1 In one implementation, two or more high-temperature pipes 1 are provided, which can simultaneously regulate the pressure of multiple high-temperature pipes 1.

[0024] refer to Figure 1 In one implementation, a pressure measuring device 2 is installed on the high-temperature pipeline 1 to measure the pressure of the high-temperature pipeline 1. The pressure measuring device 2 is electrically connected to the central control system 6. When the pressure measuring device 2 measures the pressure inside the high-temperature pipeline 1, it transmits the signal to the central control system 6 through the pressure signal transmission channel 7. The central control system 6 analyzes the pressure signal and transmits the control signal to the regulating component 3 through the regulating signal transmission channel 8 to control the opening degree of the regulating component 3.

[0025] It should be noted that the pressure signal transmission channel 7 and the control signal transmission channel 8 can be transmitted via wired connection or wireless connection.

[0026] refer to Figure 1 In one implementation, the pressure measuring device 2 can be a gas pressure sensor or a barometer, used to monitor the pressure value inside the high-temperature pipeline 1.

[0027] refer to Figure 1 In one implementation method, the air source 5 is connected to the air supply channel through a fan to deliver the air source 5.

[0028] refer to Figure 1In one embodiment, the gas source 5 is natural air, the return of low-temperature flue gas from the high-temperature flue gas pipeline 1, or excess nitrogen from the plant area. The pressure value inside the high-temperature pipeline 1 is regulated by connecting an external gas source or by utilizing the return of flue gas from the high-temperature flue gas pipeline 1.

[0029] refer to Figure 1 In one embodiment, a branch pipe is provided at the outlet of the high-temperature pipe 1. The branch pipe is connected to the gas source 5. By setting the branch pipe, the gas discharged from the high-temperature pipe 1 can be recycled. The pressure inside the high-temperature pipe 1 can be regulated without connecting to the external gas source 5.

[0030] It should be noted that the required flow rate ΔQ i The calculation formula is: ΔQ i =K×ΔP i ×D i 2 / ρ i ;

[0031] Where, ΔP i This represents the pressure difference between every two high-temperature pipes 1;

[0032] D i The diameter or equivalent diameter of high-temperature pipe 1;

[0033] ρ i The working density of the gas inside high-temperature pipeline 1;

[0034] K is the adjustment coefficient, where k < 1.

[0035] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0036] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-temperature flue gas pressure regulating device, characterized in that, The system includes a central control system, a high-temperature pipeline for conveying high-temperature flue gas, a gas source connected to the high-temperature pipeline via a make-up air pipeline, and a regulating component for controlling the gas flow rate of the make-up air pipeline. The central control system controls the regulating component by collecting pressure signals from the high-temperature pipeline.

2. The high-temperature flue gas pressure regulating device according to claim 1, characterized in that, The high-temperature pipeline is configured as two or more.

3. The high-temperature flue gas pressure regulating device according to claim 2, characterized in that, The high-temperature pipeline is equipped with a pressure measuring device for measuring the pressure of the high-temperature pipeline, and the pressure measuring device is electrically connected to the central control system.

4. The high-temperature flue gas pressure regulating device according to claim 3, characterized in that, The pressure measuring device is a gas pressure sensor or a barometer.

5. The high-temperature flue gas pressure regulating device according to claim 1, characterized in that, The air source is connected to the make-up air pipeline via a fan.

6. The high-temperature flue gas pressure regulating device according to claim 5, characterized in that, The gas source is air, low-temperature flue gas, or nitrogen.

7. The high-temperature flue gas pressure regulating device according to claim 6, characterized in that, The high-temperature pipeline has a branch pipe at its outlet, and the branch pipe is connected to the make-up air pipeline.

8. The high-temperature flue gas pressure regulating device according to claim 5, characterized in that, The fan is electrically connected to the central control system.

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