Calcium carbide furnace flue gas recycling device

Abstract

The utility model discloses a calcium carbide furnace flue backflow device belongs to calcium carbide furnace technical field, including main body tower, the docking pipe bifurcation is connected in main pipe, and the docking pipe inside is provided with the regulating valve two in proper order along the airflow direction to the plug board valve, and the regulating valve one is set up before the connecting position of the connecting pipe on the main pipe along the airflow direction, and the regulating valve one still is provided with the gate valve and the blind plate valve in proper order on the main pipe, and is provided with two check valves who are arranged between blind plate valve and regulating valve one and are connected with nitrogen gas pipeline, and the central control system electricity is connected regulating valve one and regulating valve two. The utility model discloses a regulating valve one and regulating valve two are set up, realized the independent accurate flow control to the backflow and the shunt furnace gas, and provide cooling for the coarse gas blower, and realize pipeline replacement through nitrogen gas pipeline and check valve, and the safety and stability of calcium carbide furnace production system are improved significantly, and then reach the purpose of increasing production.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbide furnace technology, and in particular to a calcium carbide furnace gas reflux device. Background Technology

[0002] During the production of calcium carbide, the calcium carbide furnace produces a large amount of furnace gas. This gas has high recycling value and needs to be collected and purified before it can be used as a chemical raw material or fuel. The purification process of the furnace gas is completed in the main tower purification equipment, and the purified gas is called clean gas.

[0003] However, the temperature of the purified gas is still very high after purification. When the high-temperature purified gas flows in the subsequent conveying pipeline, it is easy for dust or other substances to stick to the inner wall of the pipeline. Over time, this will cause blockage, which will seriously affect the normal conveying of gas and may even cause the entire production system to operate at reduced load or stop, directly affecting production efficiency and economic benefits.

[0004] In addition, some high-temperature purified gas is also used to cool down key equipment of the coarse gas blower. However, due to its high temperature, the cooling effect is not ideal and it will also cause thermal damage to the cooled equipment. Although the existing gas treatment system includes some cooling measures, the structure is relatively simple and lacks an effective structure for fine and differentiated temperature control of high-temperature purified gas.

[0005] Therefore, existing technologies generally lack the ability to effectively divert and independently regulate the temperature of high-temperature clean gas, making it difficult to simultaneously meet the dual requirements of cooling and preventing blockage in the main pipeline and providing suitable cooling gas for specific equipment. This directly restricts the stability and overall efficiency of the calcium carbide production system.

[0006] Therefore, this utility model proposes a furnace gas reflux device for calcium carbide furnaces to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems in the existing technology of calcium carbide furnace gas reflux device, such as excessively high purified furnace temperature and lack of structure for precise temperature control of reflux gas and diversion gas, resulting in easy blockage of flue and poor operation stability of downstream equipment, this utility model aims to provide a calcium carbide furnace gas reflux device with improved structure that can effectively solve the above problems.

[0008] This utility model provides a gas reflux device for a calcium carbide furnace, including a main tower, a clean air fan, an inlet pipe, a main pipe, a connecting pipe, a drive component, a seamless steel pipe, a gate valve, a blind valve, a check valve, a nitrogen pipeline, a regulating valve one, a connecting pipe, a slide gate valve, a regulating valve two, and a central control system.

[0009] The connecting pipe is bifurcated and connected to the main pipe. Inside the connecting pipe, a gate valve and a regulating valve are arranged in sequence along the airflow direction for fine adjustment of the gas flow rate of the split gas. In addition, a regulating valve is installed on the main pipe before the connection position with the connecting pipe along the airflow direction for precise control of the gas flow rate returning to the main tower.

[0010] Furthermore, the main tower serves as the starting and ending point for furnace gas treatment and gas circulation. The gas inside the tower is connected to the clean gas blower through the inlet pipe. The clean gas blower is driven by a drive unit to pressurize the gas and then connects it to the main pipe through a seamless steel pipe. After passing through the gate valve and blind valve, the gas on the main pipe enters the connecting pipe through regulating valve one and connects back to the main tower. The other path is diverted to the rough gas blower through the gate valve and regulating valve two of the connecting pipe. The main pipe is also connected to a nitrogen pipeline through a check valve. The central control system is connected to regulating valve one and regulating valve two.

[0011] Preferably, the driving component is fixedly connected to the air purifier fan to drive its rotation. The driving component is a motor, and the air outlet of the air purifier fan is connected to the main pipe through a seamless steel pipe. The seamless steel pipe, with its high pressure resistance and high temperature resistance, ensures the stability and safety of gas transportation.

[0012] Preferably, a gate valve and a blind valve are sequentially installed on the main pipe before the regulating valve along the airflow direction. The gate valve is used for daily opening and closing operations, while the blind valve provides reliable physical isolation during maintenance or long-term shutdown, thus improving the maintenance safety of the system.

[0013] Preferably, a check valve is also installed on the main pipe, which is connected to the pipe wall of the main pipe and connected to a nitrogen pipeline for pipeline purging. Two check valves are installed, located on the pipe wall between the blind valve and the regulating valve, and each has a ball valve installed inside. This configuration allows for effective purging with nitrogen after the pipeline is safely isolated, avoiding safety hazards caused by residual furnace gas.

[0014] Preferably, on the connecting pipe, the gate valve and the regulating valve are arranged sequentially along the airflow direction to facilitate precise control of the split gas. The outlet of the connecting pipe is used to connect to the rough gas blower to provide it with cooling gas.

[0015] Preferably, the central control system is electrically connected to regulating valve one and regulating valve two. The central control system can automatically adjust the opening of the two regulating valves according to the real-time detected temperature of the purified gas, so as to realize intelligent and precise control of furnace gas reflux and diversion cooling, ensuring the dynamic balance of system temperature and the optimal state of equipment operation.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model solves the problem in the prior art where the purified furnace gas temperature is too high and cannot be effectively diverted for cooling, which easily leads to flue blockage and affects the stable operation of downstream equipment. By setting a branched connection to the main pipe and setting regulating valve one and regulating valve two on the main pipe and the connecting pipe respectively, this invention achieves the technical effect of independently and precisely controlling the furnace gas returning to the main pipe and the cooling furnace gas diverted to other equipment, thereby achieving dual cooling of the main pipe and key equipment and significantly improving the stability of system operation.

[0018] 2. This utility model solves the problem of the lack of safe and reliable physical isolation and pipeline replacement measures in the existing furnace gas pipeline during maintenance or emergency by adding a blind plate valve to the main pipe and setting a check valve connected to the nitrogen pipeline after it. It achieves the technical effect of reliably isolating the gas during maintenance and conveniently replacing the pipeline with nitrogen, which greatly improves the maintenance safety and operational reliability of the equipment.

[0019] 3. This utility model solves the problem that existing temperature regulation methods rely heavily on manual operation, have untimely response, and low control accuracy by adding a central control system to electrically connect and control regulating valve one and regulating valve two. It achieves the technical effect of automatically adjusting the flow rate of return and diversion gas according to real-time temperature signals, realizing intelligent and precise temperature management, thereby ensuring equipment safety and ultimately increasing production. Attached Figure Description

[0020] Figure 1 This is a front view of a calcium carbide furnace gas reflux device proposed in this utility model;

[0021] Figure 2 This is a partial structural illustration of a calcium carbide furnace gas reflux device proposed in this utility model;

[0022] Figure 3 This is a partial structural diagram of the connecting pipe of a calcium carbide furnace gas reflux device proposed in this utility model;

[0023] Figure 4 This is a partial structural diagram of the clean air fan of a calcium carbide furnace gas reflux device proposed in this utility model.

[0024] Legend:

[0025] 1. Drive unit; 2. Clean air fan; 3. Inlet pipe; 4. Seamless steel pipe; 5. Main pipe; 6. Gate valve; 7. Blind valve; 8. Check valve; 9. Nitrogen pipeline; 10. Regulating valve one; 11. Connecting pipe; 12. Main tower; 13. Butt joint pipe; 14. Slide valve; 15. Regulating valve two. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Example:

[0028] like Figure 1 and Figure 4 As shown, a furnace gas reflux device for a calcium carbide furnace includes a main tower 12, a clean gas blower 2, an inlet pipe 3, a main pipe 5, and a connecting pipe 11. The main tower 12 serves as the unit for furnace gas treatment and the source and reflux point for gas circulation. The inlet of the clean gas blower 2 is connected to the main tower 12 through the inlet pipe 3, and the outlet of the clean gas blower 2 is connected to one end of the main pipe 5. One end of the connecting pipe 11 is connected to the main pipe 5, and the other end is connected to the main tower 12. The clean gas blower 2 provides power for the circulation of furnace gas, thus forming a basic furnace gas reflux circulation loop.

[0029] To solve the above-mentioned technical problems, a gas reflux device for a calcium carbide furnace also includes a connecting pipe 13 and a regulating valve 10 installed on the pipeline, and the connecting pipe 13 and the aforementioned main pipe 5 form a branch pipeline connection relationship.

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 The gas reflux device for the calcium carbide furnace also includes a connecting pipe 13, which is branched to the main pipe 5 and used to divert a portion of the gas flowing out of the main pipe 5 to other equipment. Specifically, a gate valve 14 and a regulating valve 15 are sequentially arranged inside the connecting pipe 13 along the airflow direction. The gate valve 14 is used to open and close the pipeline, and the regulating valve 15 is used to precisely regulate the gas flow through the connecting pipe 13, thereby achieving precise cooling control of downstream equipment. At the same time, a regulating valve 10 is arranged on the main pipe 5 before the connection position with the connecting pipe 11 along the airflow direction. The regulating valve 10 is used to control and regulate the gas flow into the connecting pipe 11 and finally back to the main tower 12. Through the coordinated control of the regulating valve 10 and the regulating valve 15 by the central control system, the proportion of gas flow diverted from the main pipe 5 can be precisely allocated.

[0031] Regarding the configuration of the drive component 1 used to drive the operation of the air purifier fan 2, based on the above embodiments, as a preferred embodiment, in order to provide stable power for gas circulation, the device further includes a drive component 1. The drive component 1 is fixedly connected to the air purifier fan 2 to drive its rotation. The drive component 1 is preferably a motor, and the air outlet of the air purifier fan 2 is connected to the main pipe 5 through a seamless steel pipe 4. The seamless steel pipe 4 can withstand high gas pressure and temperature.

[0032] As another preferred embodiment, in order to facilitate pipeline maintenance and emergency shut-off, a gate valve 6 and a blind valve 7 are sequentially installed on the main pipe 5 along the airflow direction before the regulating valve 10. The gate valve 6 is used for conventional on / off control, while the blind valve 7 is used to provide a more reliable physical seal when long-term isolation or maintenance is required.

[0033] As a further preferred embodiment, in order to achieve pipeline replacement and ensure safety, a check valve 8 is also provided on the main pipe 5. The check valve 8 is connected to the pipe wall of the main pipe 5 and is connected to a nitrogen pipeline 9. In a specific arrangement, there are two check valves 8, which are arranged on the pipe wall between the blind valve 7 and the regulating valve 10. This arrangement facilitates nitrogen purging after isolation. In addition, in order to ensure unidirectional nitrogen injection, a ball valve is installed inside the check valve 8.

[0034] As a specific implementation scheme, on the connecting pipe 13, the slide gate valve 14 and the regulating valve 15 are arranged sequentially along the airflow direction to facilitate operation and flow control. At the same time, the outlet of the connecting pipe 13 is used to connect to the coarse air blower to achieve the cooling function for it.

[0035] To achieve intelligent control, regulating valve 10 and regulating valve 2 are electrically connected to automatically control the opening degree of regulating valve 10 and regulating valve 2 based on the collected temperature signal, thereby realizing precise and automated management of recirculation cooling and fan cooling.

[0036] Working principle: When the drive unit 1 is started, the drive unit 1 drives the clean air fan 2 to draw air. At this time, the gas inside the main tower 12 will enter the clean air fan 2 through the air inlet pipe 3, and then enter the main pipe 5 through the seamless steel pipe 4. Then, it passes through the gate valve 6, the blind valve 7 and the regulating valve 10 and then enters the connecting pipe 11. At the same time, the gas will enter the coarse air fan through the slide valve 14 and the regulating valve 2 15 in the connecting pipe 13 to cool the coarse air fan. Meanwhile, the gas inside the connecting pipe 11 will return to the main tower 12.

[0037] The central control system can control regulating valve 10 and regulating valve 25, and adjust their opening degree according to the purification temperature. At the same time, there are two check valves 8 on the right side of blind valve 7, which are equipped with ball valves and connected to nitrogen pipeline 9 for replacing gas pipeline, realizing furnace gas recirculation to reduce the temperature of furnace gas in the clean gas flue, prevent flue blockage, and thus increase production.

Claims

1. A furnace gas reflux device for a calcium carbide furnace, comprising: The main tower (12), the air purifier (2), the air inlet of the air purifier (2) is connected to the main tower (12) through the air inlet pipe (3), the main pipe (5), the main pipe (5) is connected to the air outlet of the air purifier (2); A connecting pipe (11) is connected at one end to the main pipe (5) and at the other end to the main tower (12). The feature is that the gas reflux device of the calcium carbide furnace further includes a connecting pipe (13), which is bifurcated and connected to the main pipe (5). The connecting pipe (13) is provided with a slide valve (14) and a regulating valve (15) inside. Furthermore, a regulating valve (10) is provided on the main pipe (5) before the connection position with the connecting pipe (11) along the airflow direction.

2. The furnace gas reflux device for a calcium carbide furnace according to claim 1, characterized in that, It also includes a drive unit (1), which is fixedly connected to the air purifier (2) to drive it to rotate; the air outlet of the air purifier (2) is connected to the main pipe (5) by a seamless steel pipe (4).

3. The furnace gas reflux device for a calcium carbide furnace according to claim 1, characterized in that, A gate valve (6) and a blind valve (7) are sequentially arranged on the main pipe (5) in the direction of airflow before the regulating valve (10).

4. The calcium carbide furnace gas reflux device according to claim 3, characterized in that, The main pipe (5) is also provided with a check valve (8), which is connected to the main pipe (5) and is connected to a nitrogen pipeline (9) for purging the pipeline.

5. The furnace gas reflux device for a calcium carbide furnace according to claim 4, characterized in that, Two check valves (8) are provided and are arranged on the pipe wall between the blind valve (7) and the regulating valve (10).

6. The calcium carbide furnace gas reflux device according to claim 4, characterized in that, The check valve (8) has a ball valve installed inside.

7. The furnace gas reflux device for a calcium carbide furnace according to claim 1, characterized in that, On the connecting pipe (13), the slide valve (14) and the regulating valve (15) are arranged sequentially along the airflow direction.

8. The furnace gas reflux device for a calcium carbide furnace according to claim 1, characterized in that, The outlet of the connecting pipe (13) is used to connect to the rough air blower.

9. The furnace gas reflux device for a calcium carbide furnace according to claim 1, characterized in that, It also includes a central control system, which is electrically connected to the first regulating valve (10) and the second regulating valve (15) for controlling their opening degree according to the temperature.

10. A furnace gas reflux device for a calcium carbide furnace according to claim 2, characterized in that, The driving component (1) is a motor.

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