Remote sampling system for explosion-proof area

Abstract

The utility model discloses a remote sampling system for an explosion-proof area. The remote sampling system comprises a valve controller, a selector valve, a reaction kettle, a circulating pump and a layered detection tank, the reaction kettle and the layered detection tank are respectively mounted on the inner side and the outer side of the explosion-proof wall; the selector valve and the circulating pump are electrically connected with the valve controller respectively; the reaction kettle, the selector valve and the circulating pump are sequentially connected through a liquid guide pipe and are connected into a liquid inlet of the layered detection tank; a liquid outlet of the layered detection tank is connected into the reaction kettle through a liquid guide pipe to form liquid guide circulation; the valve controller controls the selector valve and starts the circulating pump, so that materials in the reaction kettle are pumped out to the layered detection groove, a liquid circulating system crossing the inside and the outside of the explosion-proof wall is constructed, the materials in the reaction kettle in the wall are pumped out through the circulating pump, sampling outside the wall is achieved, and the system is used for a user to sample.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and more specifically to a remote sampling system for explosion-proof areas. Background Technology

[0002] The production of hazardous chemicals presents numerous safety risks, such as fire and explosion, leakage of toxic substances, chemical corrosion, uncontrolled chemical reactions, and risks to machinery and equipment. In particular, for production workshops with high fire and explosion risks, explosion-proof production areas must be established to prevent explosions caused by explosive gases, vapors, dust, and other hazardous substances.

[0003] For all chemical production processes, sampling and testing are unavoidable. Currently, sampling in explosion-proof production areas generally employs manual and automatic sampling methods. Both methods ultimately require operators to enter the explosion-proof area to retrieve the samples, which still poses significant safety risks.

[0004] Therefore, how to further eliminate the risk of personnel exposure in explosion-proof areas during the production process is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a remote sampling system for explosion-proof areas, which constructs a liquid circulation system spanning inside and outside the explosion-proof wall. By using a circulation pump to extract materials from the reaction vessel inside the wall, sampling outside the wall is achieved.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A remote sampling system for an explosion-proof area includes: a valve controller, a selector valve, a reaction vessel, a circulating pump, and a stratification detection tank; the reaction vessel and the stratification detection tank are respectively installed on the inner and outer sides of the explosion-proof wall; the selector valve and the circulating pump are electrically connected to the valve controller.

[0008] The reactor, the selector valve, and the circulation pump are connected in sequence via liquid guide pipes and connected to the inlet of the stratified detection tank; the outlet of the stratified detection tank is connected to the reactor via a pipeline to form a liquid guide circulation.

[0009] The valve controller controls the selection valve and starts the circulation pump to extract the material in the reactor to the stratification detection tank; the stratification detection tank is provided with a sampling port for users to take samples.

[0010] Preferably, the liquid outlet of the layered detection tank includes a first liquid outlet and a second liquid outlet; the first liquid outlet and the second liquid outlet are respectively located on the upper side and bottom of the tank body, and are used to discharge the liquid of the corresponding layer; the second liquid outlet is provided with an outflow valve to control the outflow of the bottom layer liquid.

[0011] Preferably, the reactor is provided with a first interface and a second interface, which are used to connect the first liquid outlet and the second liquid outlet, respectively.

[0012] Preferably, a lower clarifying liquid tank is provided between the outlet valve and the pipeline of the reactor.

[0013] Preferably, the bottom of the lower clarifying liquid tank is connected to one end of the selection valve via a first drain valve.

[0014] Preferably, a second drain valve is further provided between the outflow valve and the lower clarified liquid tank, and the second drain valve is connected to the other end of the selector valve via a pipe.

[0015] Preferably, the selection valve is a three-way valve, and the three ports of the three-way valve are respectively connected to the reactor, the output end of the first drain valve, and the circulation pump pipeline.

[0016] Preferably, it also includes a gas phase balance pipe, one end of which is connected to the interior of the layered detection tank via the top of the layered detection tank as a first access point, and the other end of which is connected to the lower liquid outflow pipe via a point in the lower liquid outflow pipe of the layered detection tank as a second access point, so that the first access point and the second access point are in gas phase balance.

[0017] Preferably, a steel wire hose is provided at the position corresponding to the second access point. The steel wire hose has the ability to deform in the vertical direction, and the steel wire hose adjusts the gas phase balance position when deformed.

[0018] Preferably, the lower liquid outflow pipe is also equipped with a pH detection pipe.

[0019] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a remote sampling system for explosion-proof areas. It constructs a liquid circulation system spanning both inside and outside the explosion-proof wall, using a circulation pump to extract materials from the reaction vessel inside the wall, achieving sampling outside the wall and avoiding personnel exposure within the explosion-proof area. A layered detection tank is provided, enabling the stratification of two-phase reactants for easier sampling. Furthermore, based on gas phase equilibrium, an oil-water ratio adjustment structure is provided in the layered detection tank, helping to reduce the online quantity of high-risk materials outside the explosion-proof wall and improving safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 The attached figure is a schematic diagram of the structure of a remote sampling system for explosion-proof areas provided by this utility model.

[0022] In the diagram, 1-reaction vessel, 2-selector valve, 3-circulation pump, 4-layer detection tank; 5-light liquid sampling port, 6-heavy liquid sampling port; 7-outflow valve; 8-online pH meter; 9-steel wire hose; 10-explosion-proof wall; 11-lower clarified liquid tank; 12-gas phase balance pipe; 13-first drain valve; 14-second drain valve. Detailed Implementation

[0023] 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.

[0024] This utility model discloses a remote sampling system for an explosion-proof area, including a reaction vessel 1, a selection valve 2, a circulation pump 3, and a layered detection tank 4. The reaction vessel 1 and the layered detection tank 4 are respectively installed on the inner and outer sides of the explosion-proof wall 10. The reaction vessel 1, the selection valve 2, and the circulation pump 3 are connected in sequence through a liquid guide pipe, and then connected to the inlet of the layered detection tank 4. The outlet of the layered detection tank 4 is connected to the reaction vessel through a liquid guide pipe, forming a liquid circulation. The system also includes a valve controller, which controls the selection valve 2 and starts the circulation pump 3 to extract the material in the reaction vessel 1 to the layered detection tank 4. The layered detection tank 4 is provided with a sampling port for users to take samples.

[0025] In this embodiment, the reactor 1 inside the explosion-proof wall 10 is equipped with a DCS automatic control program. After feeding, the reaction proceeds. Simultaneously, a circulation mode is activated. The selector valve 2 controls the opening of the pipeline between the reactor 1 and the circulation pump 3, allowing the circulation pump 3 to input the reactants from the reactor 1 through the selector valve 2 and the circulation pump 3 into the stratification detection tank 4. After the circulation stabilizes, samples can be taken in the stratification detection tank 4. When it is a two-phase reaction, the stratification detection tank 4 will automatically stratify after the reaction stabilizes. Samples of the upper and lower liquids are taken separately by setting up light liquid sampling port 5 and heavy liquid sampling port 6. Circulation stabilization means that the material flows normally in the pipeline and stratifies normally after a fixed residence time in the stratification detection tank (involving circulation pump flow rate adjustment; the circulation pump flow rate is taken as an empirical value after stabilization), ensuring the accuracy of sampling.

[0026] To further implement the above technical solution, the liquid outlet of the layered detection tank 4 includes a first liquid outlet and a second liquid outlet; the first liquid outlet and the second liquid outlet are respectively provided to be led out from the upper side and the bottom of the tank body, and are used to discharge the liquid of the corresponding layer; the second liquid outlet is provided with an outflow valve 7, which is electrically connected to the valve controller and controlled by the valve controller, and is used to control the outflow of the bottom layer liquid.

[0027] In this embodiment, the first liquid outlet and the second liquid outlet are used for discharging the upper liquid and the lower liquid, respectively.

[0028] Furthermore, in order to achieve liquid circulation, the first liquid outlet and the second liquid outlet are respectively connected back to the first interface and the second interface in the reactor 1.

[0029] In addition, for the convenience of sampling, the two sampling ports are respectively set at the positions corresponding to the first and second liquid outlets. For example, if the second liquid outlet is set at the bottom of the tank and leads downward, then the opening above the second liquid outlet is used as the sampling port. If the first liquid outlet is led out from the upper side of the tank, then the opening to the side of the first liquid outlet is used as the sampling port.

[0030] In this embodiment, for the layered structure in the layered detection tank 4, the light liquid overflows through the first outlet and the first guide pipe and returns to the reactor from the first interface; the heavy liquid returns to the reactor 1 through the second outlet below and the second guide pipe (i.e., the lower liquid outflow pipe) from the second interface.

[0031] To further implement the above technical solution, a lower clarified liquid tank 11 is provided in the second guiding pipe. A first drain valve 13 is provided at the bottom of the lower clarified liquid detection tank 11. The first drain valve 13 is used to connect to the guiding liquid circulation system through the selector valve 2 under the action of the guiding liquid pipeline. Specifically, the first drain valve 13 is connected to the guiding liquid circulation system through the selector valve 2.

[0032] In this embodiment, valve 2 is a three-way valve, which connects to the reactor 1, the circulating pump 3, and the lower clarified liquid tank 11. In "cleaning mode," valve 2 connects the pipeline between the lower clarified liquid tank 11 and the circulating pump 3, achieving local circulation between the lower clarified liquid tank 11, the circulating pump 3, and the layered detection tank 4. In cleaning mode, sufficient cleaning fluid is added to the lower clarified liquid tank 11, and the heavy liquid pipeline is cleaned through local circulation.

[0033] Furthermore, a second drain valve 14 is installed in the second guide pipe after the outflow valve 7. The second drain valve 14 connects the pipeline between the selector valve 2 and the circulation pump 3. Specifically, it can be installed between the outflow valve 7 and the lower clarified liquid tank 11, and its main function is to drain the liquid in the dead corner of the pipeline.

[0034] In the "drain" mode, under the control of the valve controller, the three-way valve opens all the pipelines and at the same time shuts down the circulation pump; the first drain valve and the second drain valve respectively drain the material in the lower clarifying tank and the layer detection tank, and return it to the reactor. Finally, the washing water is discharged from the reactor.

[0035] To further implement the above technical solution, the oil-water ratio is controlled under sealed conditions by utilizing the gas phase balance pipe 12 and the pipeline design.

[0036] Specifically, one end of the gas phase balance tube 12 is connected to the interior of the layered detection tank with the top of the layered detection tank 4 as the first access point, and the other end is connected to the lower liquid outflow pipe of the layered detection tank 4 with a point in the lower liquid outflow pipe as the second access point, so that the gas phase is balanced between the first access point and the second access point.

[0037] The pipeline between the second access point and the layered detection slot 4 is used as a proportional adjustment pipeline, as referenced. Figure 1 The proportional control pipeline extends downwards from the outlet valve 7 to the first node, then horizontally to the left to the second node, and then upwards to a certain height to the third node, i.e., the second access point. In the proportional control pipeline, the first drain valve 13 can be set at the second node to ensure that the liquid in the pipeline can be fully discharged.

[0038] In this embodiment, under the action of the gas phase balance pipe 12, when the second access point is raised, the gas pressure in the stratification detection tank 4 will increase, making it easier for the lower liquid to enter the lower liquid outflow pipe, thus making its proportion lower. Conversely, by lowering the height of the second access point, the proportion of the lower liquid will be higher. In high-risk reactions, high-risk materials are often light oil phases. To ensure safety, the amount of oil phase outside the explosion-proof wall can be minimized to ensure safety.

[0039] Furthermore, to enable free adjustment, a flexible steel wire hose 9 is installed at the location corresponding to the second access point. The flexible steel wire hose 9 has the ability to deform in the vertical direction, and adjusts the gas phase balance position when deformed. In addition, to improve flexibility, a flexible steel wire hose 9 can also be installed in the horizontal direction, which ensures that the height adjustment process will not damage the pipeline itself.

[0040] To further implement the above technical solution, a pH detection pipeline is also installed in the lower liquid outflow pipeline. Online pH detection is achieved through an online pH meter 8. By monitoring the pH value, the pH properties of the system are confirmed, and the normal reaction of the materials is confirmed. For example, if the reaction needs to be carried out under acidic conditions, the pH is confirmed to be less than a certain value; if the reaction needs to be carried out under alkaline conditions, the pH is confirmed to be greater than a certain value. The specific values ​​are all based on long-term production experience.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A remote sampling system for an explosion-proof area, characterized in that It comprises: A valve controller, a selection valve, a reaction kettle, a circulating pump and a layered detection tank; the reaction kettle and the layered detection tank are respectively installed on the inner and outer sides of the explosion-proof wall; the selection valve and the circulating pump are respectively electrically connected with the valve controller; The reaction kettle, the selection valve and the circulating pump are connected in sequence through a liquid guide pipe and connected to the liquid inlet of the layered detection tank; the liquid outlet of the layered detection tank is connected to the reaction kettle through a pipeline to form a liquid guide circulation; The valve controller controls the selection valve and starts the circulating pump to make the material in the reaction kettle be extracted to the layered detection tank; the layered detection tank is provided with a sampling port for users to take samples.

2. A remote sampling system for an explosion proof area according to claim 1, characterized in that The liquid outlet of the layered detection tank comprises a first liquid outlet and a second liquid outlet; the first liquid outlet and the second liquid outlet are respectively arranged on the upper side and the bottom of the tank body for discharging the liquid of the corresponding layer; the second liquid outlet is provided with an outflow valve for controlling the outflow of the bottom layer liquid.

3. A remote sampling system for an explosion proof area according to claim 2, wherein, The reaction kettle is provided with a first interface and a second interface for connecting the first liquid outlet and the second liquid outlet respectively.

4. A remote sampling system for an explosion proof area according to claim 3, wherein, The outflow valve and the pipeline of the reaction kettle are provided with a lower layer of clarified liquid tank.

5. A remote sampling system for an explosion proof area according to claim 4, wherein, The bottom of the lower layer of clarified liquid tank is connected with one end of the pipeline of the selection valve through a first exhaust valve.

6. A remote sampling system for an explosion proof area according to claim 5, wherein, The outflow valve and the lower layer of clarified liquid tank are further provided with a second exhaust valve, and the second exhaust valve is connected with the other end of the pipeline of the selection valve.

7. A remote sampling system for an explosion proof area according to claim 6, wherein, The selection valve is a three-way valve, and the three ports of the three-way valve are respectively connected with the reaction kettle, the output end of the first exhaust valve and the pipeline of the circulating pump.

8. A remote sampling system for an explosion proof area according to claim 2, wherein, It further comprises a gas phase balance pipe, one end of which is connected to the inside of the layered detection tank with the top of the layered detection tank as a first access point, and the other end is connected to the lower layer liquid outflow pipeline with a point in the lower layer liquid outflow pipeline as a second access point, so that the first access point and the second access point are in gas phase balance.

9. A remote sampling system for an explosion proof area according to claim 8, wherein, The position corresponding to the second access point is provided with a steel wire hose, which has deformation ability in the vertical direction, and the steel wire hose adjusts the gas phase balance position when deformed.

10. A remote sampling system for an explosion-protected area according to claim 8 or 9, characterized in that The lower layer liquid outflow pipeline is further provided with a PH detection pipeline.

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