Combustible gas collecting and transferring device capable of improving operation safety

Abstract

The utility model relates to the technical field of chemical engineering devices, in particular to a combustible gas collecting and transferring device capable of improving operation safety. Comprising a homogenizing buffer tank, one side of a tank body of the homogenizing buffer tank is fixedly communicated with a combustible gas collecting pipeline, the other opposite side of the tank body of the homogenizing buffer tank is fixedly communicated with a combustible gas conveying pipeline, and a booster fan is arranged on the combustible gas conveying pipeline; a gas inlet pipeline used for diluting the concentration of combustible gas is further arranged on the top of the tank body of the homogenizing buffer tank, the gas inlet pipeline is connected with a nitrogen source, and an electric one-way gas inlet valve is further arranged on the gas inlet pipeline. Compared with manual adjustment of a valve through manual observation of numerical values, the combustible gas concentration adjusting device has the advantages that the automation degree is improved, the safety risk of operators is reduced, the combustible gas concentration adjusting speed can be effectively improved, and the operation safety of the collecting and transferring device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a combustible gas collecting and transporting device capable of improving operation safety. Background Art

[0002] VOCs are one of the main sources of atmospheric pollutants. They not only cause photochemical reactions, but are also important precursors of ozone and fine particulate matter (PM2.5) pollution. By controlling VOCs, the coordinated control of PM2.5 and ozone can be strengthened, which is of great significance to achieving synergistic effects of pollution reduction and carbon reduction and promoting the continuous improvement of ecological environment quality.

[0003] In the chemical plant area, multiple oil and gas recovery devices collect and recover the combustible gas containing VOCs generated in the device, and then transport it to the homogenous buffer tank of the collection and transportation device through the collection pipeline for mixing and pressure reduction. The combustible gas is further transported to the thermal power plant through the transmission pipeline for combustion and other process treatment. Since the combustible gas can form a premixed gas with oxygen within a certain concentration range, it is explosive, so there are high requirements for the concentration of the combustible gas transported to the thermal power plant for treatment.

[0004] In the prior art, the collecting and transporting devices for mixing and reducing the pressure of combustible gases have the following technical problems: First, the adjustment of the combustible gas concentration mostly relies on the manual observation of the instrument value, and then the concentration of the combustible gas is adjusted by manually adjusting the air distribution pipeline of the homogeneous buffer tank in the collecting and transporting device to introduce the gas source. This method has a low degree of automation and a slow adjustment speed for the combustible gas concentration, which poses a great safety hazard; second, in the process of adjusting the combustible gas concentration of the homogeneous buffer tank of the collecting and transporting device, the gas source introduced is mostly air. In this way, impurities such as catkins in the air are easy to clog the air distribution pipeline, and will cause the oxygen content of the mixed gas in the homogeneous buffer tank to change. The composition of the mixed gas is not stable enough, which poses a great safety hazard. Utility Model Content

[0005] The utility model provides a combustible gas collecting and transporting device with improved operation safety, and aims to solve the technical problem of potential safety hazards in the combustible gas collecting and transporting device during operation in the prior art.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] The utility model provides a combustible gas collection and transportation device with improved operation safety, comprising a homogeneous buffer tank, one side of the tank body of the homogeneous buffer tank is fixedly connected to a combustible gas collection pipeline, the other side of the tank body of the homogeneous buffer tank is fixedly connected to a combustible gas delivery pipeline, a booster fan is arranged on the combustible gas delivery pipeline, an air intake pipeline for diluting the concentration of the combustible gas is also arranged on the top of the tank body of the homogeneous buffer tank, the air intake pipeline is connected to a nitrogen gas source, and an electric one-way air intake valve is also arranged on the air intake pipeline;

[0008] The combustible gas collection pipeline includes a header, several branch pipes fixedly connected to one side of the header, and a main pipe fixedly connected to the other side opposite to the header, the ends of the several branch pipes away from the header are connected to the combustible gas source, and the end of the main pipe away from the header is fixedly connected to the tank body of the homogeneous buffer tank; a monitoring component is provided on the main pipe, and the monitoring component controls the opening and closing of the electric one-way air intake valve through a controller.

[0009] Furthermore, a ventilation pipeline for emergency pressure relief is provided on the top of the tank body of the homogenizing buffer tank, and a safety valve is provided on the ventilation pipeline.

[0010] Furthermore, explosion-proof flame arresters are provided at the air inlet section and the air outlet section of the booster fan on the combustible gas delivery pipeline.

[0011] Furthermore, an explosion-proof flame arrester is provided on the air intake pipeline.

[0012] Furthermore, an explosion-proof flame arrester is provided on the ventilation pipeline.

[0013] The beneficial effects achieved by the utility model are:

[0014] The utility model adopts a technical measure to monitor the concentration of combustible gas by adopting a monitoring component and then controlling the ventilation pipeline to introduce an air source through a controller to dilute the concentration of combustible gas. Compared with manually observing numerical values ​​and manually adjusting valves, the utility model can improve the degree of automation and reduce the safety risk of operators. Secondly, it can effectively improve the adjustment speed of the combustible gas concentration and effectively improve the safety of the operation of the collection and transfer device.

[0015] The utility model adopts the technical measure of introducing nitrogen as a gas source to mix and dilute the concentration of combustible gas. Since nitrogen is an inert gas and will not react with the combustible gas in the storage tank, the use of nitrogen can ensure the stability of the gas composition in the homogeneous buffer tank, thereby reducing explosion accidents caused by excessively high combustible gas concentration, thereby improving the safety of the operation of the collection and transfer device.

[0016] The utility model can effectively remove static electricity by adopting the technical measures of good static bridging and overall grounding, avoid the flash explosion of flammable gas caused by static electricity, and thus effectively improve the safety of the overall operation of the collection and transfer device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 .

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 2 .

[0020] Figure 3 This utility model Figure 2 Enlarged view of part A in .

[0021] Figure 4 It is a top view of the combustible gas collecting pipeline of the utility model.

[0022] In the figure, 1. Homogeneous buffer tank; 2. Combustible gas collection pipeline; 2-1. Header; 2-2. Branch pipe; 2-3. Main pipe; 3. Combustible gas delivery pipeline; 4. Booster fan; 5. Air intake pipeline; 6. Electric one-way air intake valve; 7. Monitoring component; 8. Controller; 9. Ventilation pipeline; 10. Safety valve; 11. Explosion-proof flame arrester; 12. Air pressure sensor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0026] like Figures 1 to 4 As shown, the utility model provides a combustible gas collection and transportation device with improved operation safety, comprising a homogeneous buffer tank 1; one side of the tank body of the homogeneous buffer tank 1 is fixedly connected to a combustible gas collection pipeline 2, and the other side of the tank body of the homogeneous buffer tank 1 is fixedly connected to a combustible gas delivery pipeline 3; the combustible gas delivery pipeline 3 is connected to a thermal power plant, a boiler or other combustion mechanism to improve resource utilization; a booster fan 4 is provided on the combustible gas delivery pipeline 3; the top of the tank body of the homogeneous buffer tank 1 is also provided with an air intake pipeline 5 for diluting the concentration of the combustible gas The air intake pipeline 5 is connected to a nitrogen gas source, and an electric one-way air intake valve 6 is also provided on the air intake pipeline 5; a monitoring component 7 for monitoring the concentration of combustible gas is provided on the combustible gas collecting pipeline 2, and the monitoring component 7 controls the opening range of the electric one-way air intake valve 6 through a controller 8; a feedback adjustment method is adopted, that is, the higher the monitored combustible gas concentration is, the larger the opening range of the electric one-way air intake valve 6 is under the control of the controller 8, thereby diluting the concentration of the combustible gas and keeping the combustible gas concentration below a safe value to prevent accidents.

[0027] Preferably, the monitoring component 7 is a catalytic combustible gas detector, which uses the resistance change of the refractory metal platinum wire after heating to measure the combustible gas concentration; the controller 8 includes a PLC controller, a single-chip microcomputer or a relay circuit. The functions of the monitoring component 7 and the controller 8 involved in the utility model are prior arts, and those skilled in the art can implement their functions according to the functional description, and the specific principles are not repeated here.

[0028] As a further optimization of the present utility model, a combustible gas collecting pipeline 2 is provided with a combustible gas collecting control valve group, and the combustible gas collecting control valve group is used to switch the combustible gas collecting pipeline 2.

[0029] The combustible gas collection pipeline 2 includes a header 2-1, several branch pipes 2-2 fixedly connected to one side of the header 2-1, and a main pipe 2-3 fixedly connected to the other side opposite to the header 2-1. One end of the several branch pipes 2-2 away from the header 2-1 is connected to the combustible gas source, and one end of the main pipe 2-3 away from the header 2-1 is fixedly connected to the tank body of the homogeneous buffer tank 1.

[0030] Specifically, the monitoring component 7 is arranged on the main pipe 2-3 to monitor the concentration of the combustible gas entering the homogeneous buffer tank 1; a manual valve is arranged on each of the branch pipes 2-2 and the main pipe 2-3, so that it can be manually closed in case of an accident to prevent the combustible gas in a branch pipe 2-2 or all the combustible gases from entering the homogeneous buffer tank 1.

[0031] During specific use, one end of the several branch pipes 2-2 away from the collecting pipe 2-1 is respectively connected to the combustible gas source collected by multiple oil and gas recovery devices in the chemical device area, and the combustible gas is further transported to the homogeneous buffer tank 1 through the combustible gas collection pipeline 2 for mixing and pressure reduction. At the same time, the monitoring component 7 continuously monitors the concentration of the combustible gas flowing in the combustible gas collection pipeline 2. The monitoring component 7 transmits the measured data to the controller 8. The controller 8 controls the electric one-way air intake valve 6 to open according to the measured data to connect nitrogen to the homogeneous buffer tank 1 to maintain the combustible gas concentration inside the homogeneous buffer tank 1 within a stable range. The combustible gas with adjusted concentration is further pressurized by the booster fan 4 and then transported to the thermal power plant through the combustible gas transportation pipeline 3 for the next step of combustion and other process treatments.

[0032] As a further optimization of the present invention, a ventilation pipeline 9 for emergency pressure relief is provided on the top of the tank body of the homogeneous buffer tank 1, and a safety valve 10 is provided on the ventilation pipeline 9. The safety valve 10 is a solenoid valve, and the opening and closing of the safety valve 10 is controlled by the controller 8; further, an air pressure sensor 12 is provided in the homogeneous buffer tank 1, which is used to transmit pressure information to the controller 8. When the air pressure in the homogeneous buffer tank 1 is greater than the safety value, the controller 8 controls the safety valve 10 to open and discharge excess gas until the air pressure drops below the safety value; further, the ventilation pipeline 9 is connected to the flare device of the chemical plant to avoid polluting the environment.

[0033] As a further optimization of the present invention, the combustible gas delivery pipeline 3 is provided with explosion-proof flame arresters 11 at the air inlet section and the air outlet section of the booster fan 4, and the flame arresters are used to prevent the pipeline from backfire.

[0034] Furthermore, a monitoring component 7 is provided at the inlet of the combustible gas delivery pipeline 3 for detecting the concentration of combustible gas in the mixed gas discharged from the homogeneous buffer tank 1; the monitoring component 7 on the combustible gas delivery pipeline 3 is connected to the controller 8 to provide auxiliary data reference, so as to further improve the precision of the controller 8 in controlling the opening and closing degree of the electric one-way intake valve 6, thereby further improving safety.

[0035] As a further optimization of the utility model, an explosion-proof flame arrester 11 is provided on the air intake pipeline 5, and the explosion-proof flame arrester 11 is used to prevent the pipeline from backfire.

[0036] As a further optimization of the present invention, an explosion-proof flame arrester 11 is provided on the ventilation pipeline 9, and the explosion-proof flame arrester 11 is used to prevent the pipeline from backfire.

[0037] As a further optimization of the present utility model, a combustible gas delivery control valve group is provided on the combustible gas delivery pipeline 3 , and the combustible gas collection control valve group is used to switch the combustible gas delivery pipeline 3 .

[0038] As a further optimization of the utility model, copper wires are used to bridge the tank body of the homogeneous buffer tank 1 and the flanges and valves of the combustible gas collecting and transporting device, and the copper wires are connected to the electrostatic grounding grid.

[0039] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A combustible gas collection and transportation device for improving operation safety, characterized in that: The invention comprises a homogeneous buffer tank (1), one side of the tank body of the homogeneous buffer tank (1) is fixedly connected to a combustible gas collecting pipeline (2), the other side of the tank body of the homogeneous buffer tank (1) is fixedly connected to a combustible gas delivery pipeline (3), a booster fan (4) is arranged on the combustible gas delivery pipeline (3), and an air intake pipeline (5) for diluting the concentration of the combustible gas is also arranged on the top of the tank body of the homogeneous buffer tank (1), the air intake pipeline (5) is connected to a nitrogen gas source, and an electric one-way air intake valve (6) is also arranged on the air intake pipeline (5); The combustible gas collection pipeline (2) comprises a header (2-1), a plurality of branch pipes (2-2) fixedly connected to one side of the header (2-1), and a main pipe (2-3) fixedly connected to the other side opposite to the header (2-1), wherein one end of the plurality of branch pipes (2-2) away from the header (2-1) is connected to a combustible gas source, and one end of the main pipe (2-3) away from the header (2-1) is fixedly connected to the tank body of the homogeneous buffer tank (1); a monitoring component (7) is provided on the main pipe (2-3), and the monitoring component (7) controls the opening and closing of the electric one-way air intake valve (6) through a controller (8).

2. A combustible gas collection and transportation device for improving operation safety according to claim 1, characterized in that: A ventilation pipeline (9) for emergency pressure relief is arranged on the top of the tank body of the homogenizing buffer tank (1), and a safety valve (10) is arranged on the ventilation pipeline (9).

3. A combustible gas collection and transportation device for improving operation safety according to claim 2, characterized in that: An explosion-proof flame arrester (11) is provided on the ventilation pipeline (9).

4. A combustible gas collection and transportation device for improving operation safety according to claim 1, characterized in that: The combustible gas delivery pipeline (3) is provided with explosion-proof flame arresters (11) at both the air inlet section and the air outlet section of the booster fan (4).

5. A combustible gas collection and transportation device for improving operation safety according to claim 2, characterized in that: An explosion-proof flame arrester (11) is provided on the air intake pipeline (5).

Images