Device for avoiding inner leakage of feed valve of hydrogenation reaction kettle

Abstract

The utility model discloses a device for avoiding inner leakage of a feeding valve of a hydrogenation reaction kettle, which relates to the technical field of modification of a feeding pipeline of the hydrogenation reaction kettle in a sugar alcohol production process, and adopts the technical scheme that a feeding double-valve system is arranged on the feeding pipeline of the reaction kettle and consists of a feeding valve 1 and a feeding valve 2 which are connected in series; a discharge pipeline is connected between the feed valve 1 and the feed valve 2, and a detection mechanism and an alarm mechanism are arranged on the discharge pipeline. Compared with the prior art, the utility model has the beneficial effects that by changing the original feeding valve, adding the feeding double valve, leading out the high-pressure pipeline from the middle connecting pipeline of the feeding double valve and additionally arranging the hydrogen alarm probe, whether the feeding valve leaks internally or not is judged in advance, and the pressure in the kettle is released outdoors in advance; and the possibility of explosion caused by gas leakage in the valve is eliminated in time, and safety accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of the transformation of the feeding pipeline of a hydrogenation reactor in the production process of sugar alcohols, and particularly relates to a device for avoiding internal leakage of a feeding valve of a hydrogenation reactor. Background Art

[0002] In the production process of preparing sugar alcohols by hydrogenation, the hydrogenation method is generally used, and a hydrogenation reactor is used. The hydrogenation reaction belongs to high temperature and high pressure, and the pressure involves hydrogen which is flammable and explosive. There is a great potential safety hazard that the catalyst nickel-aluminum alloy will spontaneously ignite when contacting with air. Although the existing technology uses a DCS hydrogenation over-temperature and over-pressure automatic interlock system to improve safety, the situation of manually opening and closing the feeding valve still exists. Inevitably, the feeding valve will have internal leakage after a long time, resulting in hydrogen materials in the reactor and hydrogen flowing back into the feeding tank, which may cause an explosion.

[0003] How to avoid safety accidents caused by internal leakage of the feeding valve of the hydrogenation reactor is the research topic of this solution. Content of the Utility Model

[0004] In order to achieve the above-mentioned utility model purpose and address the above technical problems, the utility model provides a device for avoiding internal leakage of a feeding valve of a hydrogenation reactor.

[0005] Its technical solution is as follows: It includes a feeding double-valve system arranged on the feeding pipeline of the reactor. The feeding double-valve system is composed of a feeding valve 1 and a feeding valve 2 connected in series. A relief pipeline is connected between the feeding valve 1 and the feeding valve 2, and a detection mechanism and an alarm mechanism are arranged on the relief pipeline.

[0006] The detection mechanism includes a detection valve arranged on the relief pipeline close to the feeding pipeline. The alarm mechanism includes a hydrogen gas alarm probe arranged on the relief pipeline, which is used to predict in advance whether the feeding valve has internal leakage, monitor the internal leakage situation of the feeding valve in real time, and send an alarm when internal leakage is detected, and at the same time start an automatic relief valve to relieve pressure.

[0007] An automatic emptying pipeline is also connected to the reactor, and an automatic relief valve is arranged at one end of the automatic emptying pipeline close to the reactor.

[0008] A feeding tank is connected to the feeding pipeline, and a feeding pump is arranged on the feeding pipeline of the feeding tank.

[0009] The hydrogen gas alarm probe is electrically connected to the automatic relief valve.

[0010] The relief pipeline is made of a high-pressure pipeline.

[0011] One end of the automatic emptying pipeline and the relief pipeline are both connected outdoors.

[0012] This solution uses two series-connected feed valves (feed valve 1 and feed valve 2), and a discharge pipeline is connected between these two valves. A detection mechanism and an alarm mechanism are provided on the discharge pipeline to achieve the monitoring and early warning of the internal leakage of the feed valve.

[0013] The detection mechanism includes a detection valve, which is set at the position of the discharge pipeline close to the feed pipeline and is used to monitor the internal leakage of the feed valve in real time.

[0014] The alarm mechanism includes a hydrogen alarm probe, which is set on the discharge pipeline and can emit an alarm when internal leakage is detected.

[0015] An automatic evacuation pipeline is connected to the reactor, and an automatic discharge valve is set at one end close to the reactor, which is used to automatically start the discharge valve for pressure relief when internal leakage is detected, preventing the accumulation of hydrogen and causing an explosion.

[0016] The discharge pipeline is designed with high pressure to ensure that when internal leakage occurs, hydrogen can be quickly and effectively discharged outdoors, reducing the explosion risk.

[0017] An electrical connection is achieved between the hydrogen alarm probe and the automatic discharge valve to ensure a rapid response when internal leakage is detected.

[0018] One end of both the automatic evacuation pipeline and the discharge pipeline is connected to the outdoors to ensure that hydrogen can be safely discharged to the external environment and avoid accumulation indoors.

[0019] When it is detected that feed valve 1 has internal leakage, the hydrogen in the discharge pipeline enters the discharge pipeline through the detection valve, triggering the hydrogen alarm probe to emit an alarm, and automatically starting the automatic discharge valve for automatic pressure relief to prevent the occurrence of explosion and safety accidents. This solution is applicable to various sugar alcohol production hydrogenation processes and the transformation of hydrogenation reactors, improving the safety factor.

[0020] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model are as follows: By changing the original feed valve, adding a double feed valve, leading out a high-pressure pipeline from the connecting pipeline between the double feed valves, and installing a hydrogen alarm probe, this solution can predict in advance whether the feed valve has internal leakage, release the pressure in the reactor to the outdoors in advance, and timely eliminate the possibility of explosion caused by the internal leakage and gas backflow of the valve, avoiding safety accidents. Description of the Drawings

[0021] Figure 1 It is the overall schematic diagram of the embodiment of the present utility model. Detailed Embodiment

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "plurality" is two or more.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0026] Embodiment 1

[0027] See Figure 1 , the present utility model provides a device for preventing internal leakage of the feed valve of a hydrogenation reactor, including a feed double-valve system arranged on the feed pipeline of the reactor. The feed double-valve system is composed of a feed valve 1 and a feed valve 2 connected in series. A discharge pipeline is connected between the feed valve 1 and the feed valve 2, and a detection mechanism and an alarm mechanism are arranged on the discharge pipeline.

[0028] The detection mechanism includes a detection valve provided on the discharge pipeline near the feed pipeline. The alarm mechanism includes a hydrogen gas alarm probe provided on the discharge pipeline, which is used to pre-judge whether the feed valve has internal leakage, monitor the internal leakage situation of the feed valve in real time, and issue an alarm when internal leakage is detected, and at the same time start the automatic relief valve to relieve pressure.

[0029] An automatic evacuation pipeline is also connected to the reactor, and an automatic relief valve is provided at one end of the automatic evacuation pipeline close to the reactor.

[0030] A feed tank is connected to the feed pipeline, and a feed pump is provided on the feed pipeline of the feed tank.

[0031] The hydrogen gas alarm probe is electrically connected to the automatic relief valve.

[0032] The discharge pipeline is made of high-pressure pipeline.

[0033] One end of the automatic evacuation pipeline and the discharge pipeline are both connected outdoors.

[0034] When the present utility model is in use, it includes the following processes:

[0035] (1) Before feeding, open feed valve 1 and feed valve 2, and close the detection valve.

[0036] (2) Start the pump to complete feeding. Stop the pump.

[0037] (3) Close feed valve 1 and feed valve 2, and open the detection valve.

[0038] (4) The reactor is normally pressurized and heated for production.

[0039] (5) When internal leakage occurs in feed valve 1, the high-pressure hydrogen gas in the reactor enters the discharge pipeline through the detection valve, the hydrogen gas alarm probe alarms, and the automatic relief valve of the reactor is interlocked for automatic pressure relief.

[0040] (6) Through the action of the automatic relief valve and the alarm situation of the hydrogen gas detector, personnel can judge the internal leakage of the feed valve and evacuate the scene immediately.

[0041] (7) After the pressure is relieved, follow-up treatment is carried out.

[0042] This solution follows the principles of "safety first, prevention first" in safe production and the principle of "human safety is intrinsic safety", and can effectively avoid personal injuries caused by internal leakage of the feed valve.

[0043] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for preventing internal leakage of a feed valve of a hydrogenation reactor, characterized in that: The invention comprises a double-valve feed system arranged on the reactor feed pipeline, wherein the double-valve feed system is composed of a feed valve 1 and a feed valve 2 connected in series, a discharge pipeline is connected between the feed valve 1 and the feed valve 2, and a detection mechanism and an alarm mechanism are arranged on the discharge pipeline.

2. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 1, characterized in that: The detection mechanism comprises a detection valve arranged on the discharge pipeline close to the feed pipeline, and the alarm mechanism comprises a hydrogen alarm probe arranged on the discharge pipeline.

3. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 2, characterized in that: The reactor is also connected to an automatic emptying pipeline, and an automatic discharge valve is arranged at one end of the automatic emptying pipeline close to the reactor.

4. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 1, characterized in that: The feed pipeline is connected with a feed tank, and the feed pipeline of the feed tank is provided with a feed pump.

5. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 3, characterized in that: The hydrogen alarm probe is electrically connected to the automatic discharge valve.

6. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 1, characterized in that: The discharge pipeline adopts a high-pressure pipeline.

7. The device for preventing internal leakage of a feed valve of a hydrogenation reactor according to claim 3, characterized in that: One end of the automatic emptying pipeline and the discharge pipeline are both connected to the outdoors.

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