Gas circulating device for dry quenching furnace
By designing an air introduction assembly containing multiple intake pipes and compensation pipes, the problem that the existing dry-extinguishing furnace gas circulation device is difficult to adjust the air introduction amount when the introduction valve is faulty, and the air introduction amount is evenly allocated and flexible adjustment is achieved, ensuring the stability of the O2 content in the circulating gas and improving the coke quality.
Patent Information
- Application Number
- CN202421725420.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing dry-extinguishing furnace gas circulation device is difficult to adjust the air inlet volume when the introduction valve is faulty, resulting in a high O2 content in the circulating gas, affecting the quality of coke, and unable to effectively reduce the concentration of combustible components when the inlet temperature of the boiler is too low.
An air introduction assembly including a central pipe, a control main valve, an intelligent monitoring assembly, an intake pipe, a compensation pipe and a three-way valve is designed. By setting up two intake pipes and a compensation pipe, the air introduction volume is evenly allocated and flexible adjustment.
This avoids the uncontrollable air inlet assembly when a single pipeline regulating valve is damaged, and realizes flexible adjustment and even allocation of air inlet amount, ensures the stability of O2 content in the circulating gas, and improves the quality of coke.
Smart Images
Figure CN222877869U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas circulation devices, and in particular relates to a gas circulation device for a dry quenching furnace. Background Art
[0002] CDQ furnace is a device used to cool hot coke. It uses cold inert gas (such as nitrogen) to exchange heat with coke in the CDQ furnace to cool the coke. Compared with traditional wet quenching, this technology can effectively recover the sensible heat of coke, reduce environmental pollution, and improve the quality of coke.
[0003] Gas circulation is a key link in this process. It is responsible for blowing the inert gas for cooling the coke into the dry quenching furnace from the gas supply device at the bottom of the dry quenching furnace, and exchanging heat with the red-hot coke in countercurrent. After the heat exchange, the high-temperature circulating gas will be drawn out and subjected to dust removal. This circulation process helps to reduce the temperature of the coke, while recovering heat and improving energy utilization efficiency. In the actual production operation process, the content of flammable and explosive hydrogen and carbon monoxide in the circulating gas must be controlled to prevent danger. There are currently two ways to control the circulating gas content, namely, filling the circulating gas with nitrogen and introducing air. Air introduction is an effective way to control the concentration of combustible components in the circulating gas in the dry quenching furnace. Compared with nitrogen flushing, air introduction is more economical and convenient, and is also used more.
[0004] In the prior art, an air inlet pipe is usually used in conjunction with an inlet valve to introduce air. However, when the inlet valve fails, it is difficult to adjust the amount of air introduced in a short period of time. Introducing too much air will cause a high O2 content in the circulating gas, which is not conducive to the production of dry coke quenching. Air leaks into the negative pressure section of the gas circulation system, which can easily lead to "overburning" of coke and affect the quality of coke. When the boiler inlet temperature is too low, since combustible components such as H2 and CO cannot burn, the air introduction cannot play the role of reducing the concentration of combustible components in the circulating gas. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a gas circulation device for a dry quenching furnace.
[0006] To achieve the above objectives, the utility model provides a gas circulation device for a dry quenching furnace, comprising a furnace body, a base is installed at the bottom of the furnace body, a fence frame is installed on the outside of the furnace body, the outer wall of the fence frame is inserted and fixedly connected with evenly distributed support columns, the outer wall of the furnace body is fixedly connected with an output pipe, one end of the output pipe is fixedly connected with a primary dust collector, the other end of the primary dust collector is sequentially provided with a secondary dust collector, a dual-pressure boiler, a steam turbine, a generator set and a fan unit, and also includes an air introduction component, the air introduction component is arranged at the top of the fence frame and is connected to the negative pressure flow chamber of the furnace body, an air circulation duct is formed between the fan unit, the dual-pressure boiler, the secondary dust collector, the primary dust collector, the output pipe, the furnace body and the air introduction component, and the air introduction component is used to introduce air into the interior of the furnace body.
[0007] In the above technical solution, further, the air introduction component includes a central pipe arranged on the top of the fence frame, a main regulating valve is installed on one side of the central pipe, an intelligent monitoring assembly is arranged on the top of the central pipe, a connecting pipe is fixedly connected between the central pipe and the furnace body, two air intake pipes are fixedly connected at the bottom of the central pipe, a compensation pipe is fixedly connected between the two air intake pipes, a No. 1 regulating valve is arranged at one end of the air intake pipe close to the central pipe, a three-way valve is arranged in the middle section of the compensation pipe, and a No. 2 valve is arranged on the compensation pipe close to the port of one of the air intake pipes.
[0008] In the above technical solution, further, the intelligent monitoring assembly includes a display panel, an air composition analyzer, a control panel, a battery and a protective shell.
[0009] In the above technical solution, further, the main regulating valve is an electric air control valve.
[0010] In the above technical solution, further, the connecting pipe is communicated with the negative pressure flow cavity inside the furnace body.
[0011] In the above technical solution, further, the compensation pipe is T-shaped.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] In the utility model, two air intake pipes are provided to prevent the entire air introduction component from being in an uncontrollable state when the No. 1 regulating valve of a single pipe is damaged. By providing a three-way valve, a No. 2 valve and a compensation pipe, the air intake pipe that needs to share the air introduction amount is compensated and can be flexibly adjusted. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1This is a schematic diagram of the structure of a gas circulation device for a dry quenching furnace proposed by the utility model;
[0015] Figure 2 This is a schematic diagram of the structure of a gas circulation device for a dry quenching furnace proposed by the utility model without the enclosure structure;
[0016] Figure 3 The utility model is a schematic diagram of the structure of an air introduction component of a gas circulation device for a dry quenching furnace.
[0017] In the figure: 1. Support column; 2. Fence frame; 3. Primary dust collector; 4. Output pipe; 5. Furnace body; 6. Base; 7. Air inlet component; 8. Connecting pipe; 9. Central pipe; 10. Intelligent monitoring assembly; 11. Main regulating valve; 12. No. 1 regulating valve; 13. Inlet pipe; 14. Compensation pipe; 15. Three-way valve; 16. No. 2 valve. DETAILED DESCRIPTION
[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0019] like Figure 1-Figure 3 The gas circulation device for a dry quenching furnace shown in the figure comprises a furnace body 5, a base 6 is installed at the bottom of the furnace body 5, a fence frame 2 is installed outside the furnace body 5, and the outer wall of the fence frame 2 is inserted and fixedly connected with uniformly distributed support columns 1, the outer wall of the furnace body 5 is fixedly connected with an output pipe 4, one end of the output pipe 4 is fixedly connected with a primary dust collector 3, and the other end of the primary dust collector 3 is sequentially provided with a secondary dust collector, a double-pressure boiler, a steam turbine, a generator set and a fan set, and also includes an air introduction component 7, which is arranged on the top of the fence frame 2 and connected to the negative pressure of the furnace body 5. The two pressure flow chambers are connected to each other, and an air circulation duct is formed between the fan unit, the dual-pressure boiler, the secondary dust collector, the primary dust collector 3, the output pipe 4, the furnace body 5 and the air introduction component 7. A pipe and a fan unit for conveying inert gas are also provided at the bottom of the furnace body 5. Air is exhausted by the two sets of fan units, so that the inert gas flows inside the furnace body 5, and takes away the heat inside the furnace body 5, enters the interior of the primary dust collector 3 through the output pipe 4, and then enters the dual-pressure boiler after dust removal by the secondary dust collector, and is converted into steam to drive the steam turbine, and then drives the generator set to generate electricity.
[0020] The air introduction component 7 is used to introduce air into the interior of the furnace body 5. The air introduction component 7 includes a central pipe 9 arranged on the top of the fence frame 2. A main regulating valve 11 is installed on one side of the central pipe 9. The main regulating valve 11 is an electric air control valve. An intelligent monitoring assembly 10 is arranged on the top of the central pipe 9. The intelligent monitoring assembly 10 includes a display panel, an air composition analyzer, a control panel, a battery and a protective shell. A connecting pipe 8 is fixedly connected between the central pipe 9 and the furnace body 5. Two air intake pipes 13 are fixedly connected at the bottom of the central pipe 9. A compensation pipe 14 is fixedly connected between the two air intake pipes 13. The compensation pipe 14 is T-shaped. A No. 1 regulating valve is arranged at one end of the air intake pipe 13 close to the central pipe 9. 12, a three-way valve 15 is provided in the middle section of the compensation pipe 14, a No. 2 valve 16 is provided near the port of one of the air inlet pipes 13 of the compensation pipe 14, and the connecting pipe 8 is connected to the negative pressure flow cavity inside the furnace body 5. Since the connecting pipe 8 is connected to the negative pressure flow cavity inside the furnace body 5, when the main regulating valve 11 is opened, air will flow from the inside of the two air inlet pipes 13 to the inside of the central pipe 9, and then enter the inside of the furnace body 5 through the connecting pipe 8 to complete the air introduction. By setting two sets of air inlet pipes 13, it is more convenient to introduce air, and at the same time, it is avoided that when the No. 1 regulating valve 12 is damaged, the entire air introduction component 7 is in an inoperable state. Specifically, when the No. 1 regulating valve 12 of one side is damaged, The air intake duct 13 corresponding to the No. 1 regulating valve 12 is in a non-regulatory state, so the air intake duct 13 on the other side can continue to work. However, since the air intake duct 13 on one side is in a non-regulatory state, if the air intake amount at the adjustable air intake duct 13 increases, in order to avoid a significant reduction in service life, at this time, by adjusting the three-way valve 15 and the No. 2 valve 16, the compensation duct 14 and the adjustable air intake duct 13 are in a connected state. Under the inconvenient condition of adjusting the main valve 11, the air intake amount of the adjustable air intake duct 13 is evenly distributed, wherein the working state of the three-way valve 15 and the No. 2 valve 16 is that the No. 2 valve 16 is in a closed state, and the three-way valve 15 is in a closed state with the No. 2 valve 16 and the compensation duct The ends of the pipe 14 are connected so that neither of the two air intake pipes 13 is connected to the compensation pipe 14. When one side needs to share the air, if the pipe connected to the No. 2 valve 16 is in a controllable state, the No. 2 valve 16 can be opened. If the pipe connected to the No. 2 valve 16 is in an uncontrollable state, the three-way valve 15 can be adjusted to connect with the controllable air intake pipe 13. The advantage of such a setting is that by setting two air intake pipes 13, when the No. 1 regulating valve 12 of a single pipe is damaged, the entire air introduction component 7 is prevented from being in an uncontrollable state. By setting the three-way valve 15, the No. 2 valve 16 and the compensation pipe 14, the air intake pipe 13 that needs to share the air introduction amount can be compensated and can be flexibly adjusted.
[0021] Working principle:
[0022] The bottom of the furnace body 5 is also provided with a pipeline and a fan group for conveying inert gas. Through the two groups of fan groups, air is extracted so that the inert gas flows inside the furnace body 5 and takes away the heat inside the furnace body 5. The inert gas enters the primary dust collector 3 through the output pipeline 4, and then enters the dual-pressure boiler after dust removal through the secondary dust collector, and is converted into steam to drive the steam turbine, and then drives the generator set to generate electricity.
[0023] Since the connecting pipe 8 is connected to the negative pressure flow cavity inside the furnace body 5, when the regulating main valve 11 is opened, air will flow from the inside of the two air intake pipes 13 into the inside of the central pipe 9, and then enter the inside of the furnace body 5 through the connecting pipe 8 to complete the air introduction. By setting up two sets of air intake pipes 13, it is more convenient to introduce air, and at the same time, it is avoided that when the No. 1 regulating valve 12 is damaged, the entire air introduction component 7 is in an inoperable state. Specifically, when the No. 1 regulating valve 12 on one side is damaged, the air intake pipe 13 corresponding to the No. 1 regulating valve 12 is in an unregulatory state, so the air intake pipe 13 on the other side can continue to work, but because the air intake pipe 13 on one side is in an unregulatory state, if the air introduction amount at the adjustable air intake pipe 13 increases, in order to avoid a significant reduction in service life, at this time, the three-way valve 15 and the No. 2 valve 16 are adjusted to make the compensation pipe 14 and the adjustable air intake pipe 13 in a connected state, which is inconvenient at the regulating main valve 11. Under the condition of , the air introduction amount of the adjustable intake duct 13 is evenly distributed, wherein the working state of the three-way valve 15 and the No. 2 valve 16 is that the No. 2 valve 16 is in a closed state, and the three-way valve 15 is connected to the closed No. 2 valve 16 and the end of the compensation duct 14, so that the two intake ducts 13 are not connected to the compensation duct 14, and when one party needs to balance, if the pipeline connected to the No. 2 valve 16 is in a controllable state, the No. 2 valve 16 can be opened, and if the pipeline connected to the No. 2 valve 16 is in an uncontrollable state, the three-way valve 15 is adjusted to be connected to the controllable intake duct 13. The advantage of such a setting is that by setting two intake ducts 13, when the No. 1 regulating valve 12 of a single pipeline is damaged, the entire air introduction component 7 is in an uncontrollable state. By setting the three-way valve 15, the No. 2 valve 16 and the compensation duct 14, the intake duct 13 that needs to balance the air introduction amount is compensated, and it can be flexibly adjusted.
[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A gas circulation device for a dry quenching furnace, comprising a furnace body (5), a base (6) being installed at the bottom of the furnace body (5), a fence frame (2) being installed outside the furnace body (5), the outer wall of the fence frame (2) being inserted and fixedly connected with evenly distributed support columns (1), an output pipe (4) being fixedly connected to the outer wall of the furnace body (5), one end of the output pipe (4) being fixedly connected to a primary dust collector (3), and the other end of the primary dust collector (3) being sequentially provided with a secondary dust collector, a dual-pressure boiler, a steam turbine, a generator set and a fan set, characterized in that: It also includes an air introduction component (7), wherein the air introduction component (7) is arranged on the top of the fence frame (2) and is connected to the negative pressure flow cavity of the furnace body (5); An air circulation duct is formed between the fan unit, the dual-pressure boiler, the secondary dust collector, the primary dust collector (3), the output duct (4), the furnace body (5) and the air introduction assembly (7); The air introduction component (7) is used to introduce air into the interior of the furnace body (5).
2. A gas circulation device for a CDQ furnace according to claim 1, characterized in that: The air introduction component (7) comprises a central pipe (9) arranged on the top of the fence frame (2), a main regulating valve (11) is installed on one side of the central pipe (9), an intelligent monitoring assembly (10) is arranged on the top of the central pipe (9), a connecting pipe (8) is fixedly connected between the central pipe (9) and the furnace body (5), two air intake pipes (13) are fixedly connected at the bottom of the central pipe (9), a compensation pipe (14) is fixedly connected between the two air intake pipes (13), a first regulating valve (12) is arranged at one end of the air intake pipe (13) close to the central pipe (9), a three-way valve (15) is arranged in the middle section of the compensation pipe (14), and a second valve (16) is arranged at the compensation pipe (14) close to one of the ports of the air intake pipes (13).
3. A gas circulation device for a CDQ furnace according to claim 2, characterized in that: The intelligent monitoring assembly (10) comprises a display panel, an air composition analyzer, a control panel, a battery and a protective shell.
4. A gas circulation device for a CDQ furnace according to claim 2, characterized in that: The regulating main valve (11) is an electric air control valve.
5. A gas circulation device for a CDQ furnace according to claim 2, characterized in that: The connecting pipe (8) is in communication with the negative pressure flow cavity inside the furnace body (5).
6. A gas circulation device for a CDQ furnace according to claim 2, characterized in that: The compensation pipe (14) is T-shaped.