Safe gas supply pipeline system of annealing cracking furnace

Abstract

The utility model relates to the technical field of cracking equipment, in particular to a safe gas supply pipeline system of an annealing cracking furnace, which comprises a methanol cracking furnace, a feeding pipeline and a discharging pipeline, a first electromagnetic valve and a second electromagnetic valve are sequentially arranged on the feeding pipeline in the direction of the methanol cracking furnace; the device further comprises a discharging mechanism, the discharging mechanism comprises a discharging electromagnetic valve communicated with the feeding pipeline, and the discharging electromagnetic valve is located between the first electromagnetic valve and the methanol cracking furnace; the discharging electromagnetic valve is a three-way electromagnetic valve, the lower portion of the discharging electromagnetic valve is communicated with a discharging pipeline, and the lower portion of the discharging pipeline is communicated with a material receiving barrel. The system can avoid the leakage risk when a methanol solution is introduced into the cracking furnace, the methanol cracking production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a safe gas supply pipeline system for an annealing cracking furnace. Background Art

[0002] Cracking refers to the process of converting large molecules into small molecules through thermal energy. For example, methanol can produce hydrogen and carbon monoxide through the cracking process. The methanol cracking process requires the use of a cracking furnace. The cracking furnace is the core equipment of the cracking process. It is necessary to set up a pressure, temperature, and flow detection system on the equipment to strictly control the temperature, pressure, material flow and other process parameters in the cracking furnace.

[0003] In order to accurately control the feed amount of the raw material into the feed pipe, the prior art, such as "A Methanol Cracking Device" (Publication No.: CN111422831B), usually adds a solenoid valve to the pipeline to achieve the opening and closing adjustment of the feed pipeline to achieve the purpose of controlling the supply amount of the methanol stock solution. However, the prior art still has the following technical problems:

[0004] Since the solenoid valve is used all year round, it is very easy to wear. The worn solenoid valve has poor sealing performance. When it is necessary to close the solenoid valve on the feed pipeline, some methanol will still enter the cracking furnace through the solenoid valve. If the cracking furnace equipment is shut down for a period of time, methanol will continue to enter the cracking furnace from the solenoid valve of the feed pipe and accumulate in large quantities, causing a very large safety hazard when the cracking furnace is started later. Utility Model Content

[0005] The utility model provides a safe gas supply pipeline system for an annealing cracking furnace, which can solve the problem in the prior art that the electromagnetic valve on the feed pipeline of the cracking furnace has poor sealing due to wear, so that methanol still enters the cracking furnace when the electromagnetic valve is closed, causing safety hazards when the equipment is started up next time.

[0006] The present application provides the following technical solutions: a safe gas supply pipeline system for an annealing cracking furnace, comprising a methanol cracking furnace and a feed pipe and a discharge pipe connected to the methanol cracking furnace;

[0007] The feed pipeline is provided with a first solenoid valve and a second solenoid valve in sequence along the direction of the methanol cracking furnace;

[0008] It also includes a discharge mechanism, the discharge mechanism includes a discharge solenoid valve connected to the feed pipeline, and the discharge solenoid valve is located between the first solenoid valve and the methanol cracking furnace;

[0009] The discharge solenoid valve is a three-way solenoid valve, a discharge pipe is connected below the discharge solenoid valve, and a material receiving bucket is connected below the discharge pipe.

[0010] Beneficial effects:

[0011] 1. When the first solenoid valve and the second solenoid valve are worn and the sealing is not tight, the methanol liquid flowing in from the feed pipe will pass through the discharge solenoid valve before entering the methanol cracking furnace. The discharge solenoid valve in the open state will guide the methanol liquid into the receiving barrel through the discharge pipe, thereby preventing the methanol liquid from entering the methanol cracking furnace and gradually accumulating, preventing safety risks when the equipment is started next time; at the same time, the methanol liquid stored in the receiving barrel can be reused, which is conducive to saving raw material resources.

[0012] 2. The first solenoid valve and the second solenoid valve are set on the feed pipeline for use together, which can provide double protection and improve the accuracy of the opening and closing regulation control of the feed pipeline.

[0013] Furthermore, the feed pipeline is also provided with a first manual valve and a second manual valve, and the first manual valve is located between the second solenoid valve and the second manual valve.

[0014] Beneficial effect: The purpose of setting the first manual valve and the second manual valve is to add a safety measure, manually close the manual valve, and improve the tightness of the closure of the feed pipeline.

[0015] Furthermore, a flow meter is installed on the feed pipeline, and the flow meter is located between the first solenoid valve and the second solenoid valve.

[0016] Beneficial effects: The flow meter can measure the flow rate of methanol liquid in the feed pipeline, so that the operator can judge the operating status of the pipeline system. At the same time, the flow meter is set between the first solenoid valve and the second solenoid valve, and it can also specifically determine which solenoid valve has a sealing problem, so as to quickly lock the worn solenoid valve and replace it.

[0017] Furthermore, the methanol cracking furnace is also connected to a discharge pipe.

[0018] Beneficial effect: The discharge pipeline facilitates the discharge of the gas after methanol cracking to the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The symbols in the drawings of the specification include: methanol cracking furnace 1, discharge pipe 2, feed pipe 3, discharge solenoid valve 4, first solenoid valve 5, flow meter 6, second solenoid valve 7, first manual valve 8, second manual valve 9.

[0022] Embodiment 1

[0023] like Figure 1 As shown, the annealing cracking furnace safety gas supply pipeline system includes a methanol cracking furnace 1 and a feed pipeline 3 and a discharge pipeline 2 connected to the methanol cracking furnace 1.

[0024] The upper edge of the feed pipeline 3 is connected in sequence with a discharge mechanism, a first solenoid valve 5, a flow meter 6, a second solenoid valve 7, a first manual valve 8 and a second manual valve 9 in the direction of the methanol cracking furnace 1. The end of the feed pipeline 3 away from the methanol cracking furnace 1 can be connected to the methanol storage system. The first manual valve 8 and the second manual valve 9 can add a safety measure to improve the tightness of the closure of the feed pipeline 3 by manually closing the manual valve.

[0025] The flowmeter 6 can not only measure the flow rate of methanol liquid in the feed pipeline, which is convenient for the operator to judge the operating status of the pipeline system, but also set the flowmeter 6 between the first solenoid valve 5 and the second solenoid valve 7, so as to specifically determine which solenoid valve has a sealing problem. For example, when methanol solution flows through the feed pipeline 3, open the first solenoid valve 5 and close the second solenoid valve 7. If the flowmeter 6 can still detect the flow rate, it means that there is a problem with the sealing of the second solenoid valve 7 and it needs to be replaced. For another example, open the second solenoid valve 7 and close the first solenoid valve 5. If the flowmeter 6 can still detect the flow rate, it means that there is a problem with the sealing of the first solenoid valve and it needs to be replaced.

[0026] The discharge mechanism includes a discharge solenoid valve 4 connected to the feed pipe 3, and the discharge solenoid valve 4 is located between the first solenoid valve 5 and the methanol cracking furnace 1; the discharge solenoid valve 4 is a three-way solenoid valve, and a discharge pipe is connected below the discharge solenoid valve 4, and a receiving barrel is connected below the discharge pipe. The first solenoid valve 5, the second solenoid valve 7 and the discharge solenoid valve 4 are all controlled by PLC.

[0027] The system operates as follows:

[0028] Methanol solution is fed from feed pipe 3 according to Figure 1 The gas passes through the second manual valve 9, the first manual valve 8, the second solenoid valve 7, the first solenoid valve 5, and the discharge solenoid valve 4 in the direction indicated by the arrow in the figure, and then enters the methanol cracking furnace 1 for cracking process. The gas generated after cracking enters the subsequent process through the discharge pipe 2.

[0029] When the equipment needs to be shut down, the first solenoid valve 5 and the second solenoid valve 7 are closed by PLC control, and the outlet B of the discharge solenoid valve 4 is closed to connect the inlet A with the outlet C. At the same time, the operator manually closes the first manual valve 8 and the second manual valve 9. If the first solenoid valve 5 and the second solenoid valve 7 are worn and not closed tightly, during the process of the first manual valve 8 and the second manual valve 9 being gradually closed, the methanol solution in the feed pipe 3 will flow through the worn first solenoid valve 5 and the second solenoid valve 7, and then flow into the inlet A of the discharge solenoid valve 4 and into the discharge pipe through the outlet C, and finally flow into the receiving barrel, thereby preventing the methanol solution from entering the methanol cracking furnace 1, so as to prevent the methanol solution from entering the methanol cracking furnace 1 and accumulating due to the loose closure of the valve during the shutdown operation, thereby avoiding safety hazards when the machine is started next time.

[0030] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An annealing cracking furnace safety gas supply pipeline system, comprising a methanol cracking furnace and a feed pipe and a discharge pipe connected to the methanol cracking furnace, characterized in that: The feed pipeline is provided with a first solenoid valve and a second solenoid valve in sequence along the direction of the methanol cracking furnace; It also includes a discharge mechanism, the discharge mechanism includes a discharge solenoid valve connected to the feed pipeline, and the discharge solenoid valve is located between the first solenoid valve and the methanol cracking furnace; The discharge solenoid valve is a three-way solenoid valve, a discharge pipe is connected below the discharge solenoid valve, and a material receiving bucket is connected below the discharge pipe.

2. The annealing and cracking furnace safety gas supply pipeline system according to claim 1, characterized in that: The feed pipeline is also provided with a first manual valve and a second manual valve, wherein the first manual valve is located between the second solenoid valve and the second manual valve.

3. The annealing and cracking furnace safety gas supply pipeline system according to claim 2 is characterized in that: A flow meter is also installed on the feed pipeline, and the flow meter is located between the first solenoid valve and the second solenoid valve.

4. The annealing and cracking furnace safety gas supply pipeline system according to claim 3 is characterized in that: The methanol cracking furnace is also connected with a discharge pipeline.

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