Gas pressure stabilizing device applied to on-line raw gas measuring system

Abstract

The invention discloses a gas pressure stabilizing device applied to a raw gas on-line measuring system, the gas pressure stabilizing device comprises a first-stage washing tank, the first-stage washing tank is filled with water, the top of the first-stage washing tank is communicated with a gas inlet pipe, the outer end of the gas inlet pipe is communicated with a bipolar pressure reducing valve and a flow regulating valve, and the outer end of the bipolar pressure reducing valve is communicated with a gas inlet pipe. The bipolar pressure reducing valve is located on the front side of the flow adjusting valve, and the other end of the air inlet pipe is inserted into the water of the first-stage washing tank. The gas pressure stabilizing device has the characteristic of stable reduced pressure.

Description

Technical Field

[0001] This invention relates to the field of crude gas measurement, and in particular to a gas pressure stabilizing device for use in an online crude gas measurement system. Background Technology

[0002] As is well known, crude coal gas contains a large amount of tar, dust, hydrogen sulfide and other acidic substances and water vapor. It has the characteristics of high viscosity, easy crystallization and corrosiveness. The complex gas composition can easily cause blockage and corrosion of the analysis system. In severe cases, tar can contaminate the analysis chamber of the analytical instrument, resulting in inaccurate analytical data and the inability of online analytical instruments to work properly.

[0003] Currently, the commonly used technology only uses pressure reducing valves to reduce pressure, which has problems such as unstable pressure reduction and easy overpressure in the system, and cannot guarantee the safety and stability of the system during operation.

[0004] Therefore, it is necessary to design a gas pressure stabilizing device for use in online crude gas measurement systems that can reduce pressure and stabilize it. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the currently commonly used technology only uses pressure reducing valves to reduce pressure, which has problems such as unstable pressure reduction and easy overpressure of the system, and cannot guarantee the safety and stability of the system during operation.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a gas pressure stabilizing device for an online measurement system of crude coal gas, the gas pressure stabilizing device including a primary water washing tank, the interior of the primary water washing tank being filled with water, the top of the primary water washing tank being connected to an air inlet pipe, the outer end of the air inlet pipe being connected to a bipolar pressure reducing valve and a flow regulating valve, the bipolar pressure reducing valve being located in front of the flow regulating valve, and the other end of the air inlet pipe being inserted underwater in the primary water washing tank.

[0007] The gas pressure stabilizing device also includes a primary liquid seal tank, which is filled with water. A connecting pipe connects the top of the primary liquid seal tank to a primary water washing tank. One end of the connecting pipe connected to the primary water washing tank is above the liquid surface, and the other end connected to the primary liquid seal tank is below the liquid surface. A gas discharge pipe is connected to the top of the primary liquid seal tank, and the lower end of the gas discharge pipe is above the liquid surface inside the primary liquid seal tank.

[0008] The outlet pressure of the bipolar pressure reducing valve is 0.1 MPa.

[0009] The liquid level in the primary liquid seal tank is 1.2m.

[0010] A one-way valve is installed between the primary liquid seal tank and the primary water washing tank, and the one-way valve is connected to the connecting pipe.

[0011] The portion of the air inlet pipe located inside the primary water washing tank is configured with multiple air ports.

[0012] The beneficial effects of this invention are as follows:

[0013] Equipped with a bipolar pressure reducing valve, a flow regulating valve, and a check valve, sample gas enters through the inlet pipe. After being reduced in pressure by the bipolar pressure reducing valve, it enters the flow regulating valve, which regulates the flow rate of the sample gas into the primary water washing tank. The sample gas undergoes water washing as it passes through the primary water washing tank. When the pressure of the sample gas entering the primary water washing tank exceeds that of the primary liquid seal tank, the pressure controlled by the tank's liquid level enters the primary liquid seal tank through the check valve via the pipeline connected to it, thus disrupting the liquid level control pressure of the primary liquid seal tank. Excess gas is discharged through the gas exhaust pipe. In the event of system blockage, the gas phase pressure in the primary water washing tank decreases. The check valve prevents water from flowing back from the primary liquid seal tank to the primary water washing tank. Multiple gas ports effectively prevent blockages during operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] In the diagram: 1. Two-stage pressure reducing valve; 2. Flow regulating valve; 3. Primary water washing tank; 4. Air inlet pipe; 5. Connecting pipe; 6. Check valve; 7. Primary liquid seal tank; 8. Gas discharge pipe. Detailed Implementation

[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0017] Please see Figure 1 The gas pressure stabilizing device includes a primary water washing tank 3, which is filled with water. The top of the primary water washing tank 3 is connected to an air inlet pipe 4. The outer end of the air inlet pipe 4 is connected to a bipolar pressure reducing valve 1 and a flow regulating valve 2. The bipolar pressure reducing valve 1 is located in front of the flow regulating valve 2. The other end of the air inlet pipe 4 is inserted underwater in the primary water washing tank 3. The sample gas enters through the air inlet pipe 4, is depressurized by the bipolar pressure reducing valve 1, and then enters the flow regulating valve 2. The flow regulating valve 2 regulates the flow rate of the sample gas entering the primary water washing tank 3. The sample gas is washed by water as it enters the primary water washing tank 3.

[0018] The gas pressure stabilizing device also includes a primary liquid seal tank 7, which is filled with water. A connecting pipe 5 connects the top of the primary liquid seal tank 7 to the primary water washing tank 3. One end of the connecting pipe 5 connected to the primary water washing tank 3 is above the liquid surface, and the other end connected to the primary liquid seal tank 7 is below the liquid surface. A gas discharge pipe 8 is connected to the top of the primary liquid seal tank 7, and the lower end of the gas discharge pipe 8 is above the liquid surface inside the primary liquid seal tank 7. When the pressure of the sample gas entering the primary water washing tank 3 is greater than that of the primary liquid seal tank 7, the pressure controlled by the liquid level height of the tank enters the primary liquid seal tank 7 through the pipe connected to the primary liquid seal tank 7 via the one-way valve 6, thereby disrupting the liquid level height control pressure of the primary liquid seal tank 7. The excess gas is discharged through the gas discharge pipe 8.

[0019] The outlet pressure of the dual-stage pressure reducing valve 1 is 0.1 MPa.

[0020] The liquid level inside the primary liquid seal tank 7 is 1.2m.

[0021] A one-way valve 6 is installed between the primary liquid seal tank 7 and the primary water washing tank 3. The one-way valve 6 is connected to the connecting pipe 5. When the system is blocked, the gas phase pressure of the primary water washing tank 3 decreases. The one-way valve 6 can prevent water in the primary liquid seal tank 7 from flowing back to the primary water washing tank 3.

[0022] The portion of the air inlet pipe 4 inside the primary water washing tank 3 is configured with multiple air ports; these multiple air ports can effectively prevent blockages during operation, thereby ensuring the stability of the sample gas pressure and the safe operation of the system.

[0023] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A gas pressure stabilizing device applied to an online measurement system for crude coal gas, characterized in that: The gas pressure stabilizing device includes a primary water washing tank (3), which is filled with water. An air inlet pipe (4) is connected to the top of the primary water washing tank (3). A bipolar pressure reducing valve (1) and a flow regulating valve (2) are connected to the outer end of the air inlet pipe (4). The bipolar pressure reducing valve (1) is located in front of the flow regulating valve (2). The other end of the air inlet pipe (4) is inserted underwater in the primary water washing tank (3).

2. The gas pressure stabilizing device for an online crude gas measurement system according to claim 1, characterized in that: The gas pressure stabilizing device also includes a primary liquid seal tank (7), which is filled with water. A connecting pipe (5) connects the top of the primary liquid seal tank (7) to the primary water washing tank (3). One end of the connecting pipe (5) connected to the primary water washing tank (3) is above the liquid surface, and the other end of the connecting pipe (5) connected to the primary liquid seal tank (7) is below the liquid surface. A gas discharge pipe (8) is connected to the top of the primary liquid seal tank (7), and the lower end of the gas discharge pipe (8) is above the liquid surface inside the primary liquid seal tank (7).

3. The gas pressure stabilizing device for an online crude gas measurement system according to claim 1, characterized in that: The outlet pressure of the bipolar pressure reducing valve (1) is 0.1 MPa.

4. The gas pressure stabilizing device for an online crude gas measurement system according to claim 1, characterized in that: The liquid level in the primary liquid seal tank (7) is 1.2m.

5. The gas pressure stabilizing device for an online crude gas measurement system according to claim 2, characterized in that: A one-way valve (6) is provided between the primary liquid seal tank (7) and the primary water washing tank (3), and the one-way valve (6) is connected to the connecting pipe (5).

6. The gas pressure stabilizing device for an online crude gas measurement system according to claim 1, characterized in that: The portion of the air inlet pipe (4) inside the primary water washing tank (3) is configured with multiple air ports.

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