Device for replacing drying agent in on-line environment monitoring system without shutdown

Abstract

The utility model provides a device for replacing a drying agent in an on-line environment monitoring system without shutdown, which relates to the technical field of environment monitoring and comprises an air water removal path and a hydrogen water removal path which are connected with a hydrogen-air all-in-one machine, one of the two groups of filtering systems is limited to participate in filtering, and the other group of filtering system participates in filtering after the filtering system participating in filtering is saturated. The device for replacing the drying agent without shutdown is additionally arranged between the gas output port of the hydrogen-air all-in-one machine and the gas input port of the online gas chromatograph; the drying agent in the hydrogen-air all-in-one machine does not need to be replaced, only the drying agent in the device needs to be replaced regularly, continuous supply of an air source can be guaranteed in the replacement process, and shutdown is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental monitoring technical field especially relates to a device for on -line monitoring system of environment does not stop changing drying agent. BACKGROUND

[0002] Online gas chromatograph is widely used in the field of environmental on-line monitoring, for example, the core components of the on-line monitoring system of environmental air volatile organic compounds (VOCs) and the non-methane continuous monitoring system of fixed pollution source are all online gas chromatographs. The online gas chromatograph needs a hydrogen-air integrated machine to provide dry hydrogen and air as a gas source to support the normal work of the detector FID. Generally, the drying method of hydrogen and air of the hydrogen-air integrated machine is to replace the drying agent in the gas circuit regularly to ensure the water removal effect. However, replacing the drying agent requires stopping the hydrogen-air integrated machine, and after stopping, the online gas chromatograph also stops working, and the entire on-line monitoring system needs to be replaced after the drying agent is replaced, and waits for the gas source pressure to be stable, and then can continue to run. This traditional drying agent replacement method affects the efficiency and continuity of the data for the on-line equipment, in addition, the regular stop to replace the drying agent increases the risk of system failure due to frequent stop and start of the instrument, so it is necessary to provide a device for on-line monitoring system of environment does not stop changing drying agent. SUMMARY

[0003] The utility model discloses a device for on-line monitoring system of environment does not stop changing drying agent, to solve the above technical problem.

[0004] The utility model discloses a device for on-line monitoring system of environment does not stop changing drying agent, to solve the above technical problem.

[0005] A device for on-line monitoring system of environment does not stop changing drying agent, including the air water removal path and hydrogen water removal path that hydrogen-air integrated machine is connected, wherein, air water removal path and hydrogen water removal path all have two groups of filter systems, two groups of filter systems limit a group of filter systems to participate in filtration, and the other group of filter systems participates in filtration after the saturated filter system that participates in filtration.

[0006] Preferably, the air water removal path includes a first three-way valve connected to the air interface in the hydrogen-air integrated machine, the remaining two interfaces of the first three-way valve are respectively provided with a first filter and a second filter, the first filter outlet has a first check valve, and the second filter outlet has a second check valve; The air water removal path further includes a third filter connected to the first check valve and the second check valve.

[0007] Preferably, the two groups of filter systems in the air water removal path are a first group of filter systems composed of the first filter, the first check valve and the third filter, and a second group of filter systems composed of the second filter, the second check valve and the third filter.

[0008] Preferably, the hydrogen water removal path comprises a first stop valve and a second stop valve connected with the hydrogen interface of the hydrogen-air integrated machine, wherein the first stop valve is provided with a fourth filter element, the fourth filter element is provided with a third three-way valve at the discharge port, and the remaining two interfaces of the third three-way valve are connected with a third one-way valve and an air resistance respectively;

[0009] The second stop valve is provided with a fifth filter element, the fifth filter element is provided with a fourth three-way valve at the discharge port, and the remaining two interfaces of the fourth three-way valve are connected with a fourth one-way valve and an air resistance respectively; the hydrogen water removal path further comprises a pressure container connected with the third one-way valve and the fourth one-way valve, and the pressure container is connected with a pressure stabilizing valve.

[0010] The materials used for filtering in the fourth filter element and the fifth filter element are neutral solid water removal fillers.

[0011] Preferably, the two groups of filter systems in the hydrogen water removal path are a first group of filter systems composed of the first stop valve, the fourth filter element, the third three-way valve and the third one-way valve, and a second group of filter systems composed of the second stop valve, the fifth filter element, the fourth three-way valve and the fourth one-way valve.

[0012] Preferably, the third three-way valve and the fourth three-way valve are connected with an air resistance of 0.1 MPa and 50 ml / min.

[0013] Preferably, the ends of the air water removal path and the hydrogen water removal path are online gas chromatographs.

[0014] Preferably, the material used for filtering in the third filter element is a molecular sieve and activated carbon.

[0015] Preferably, the air source pressure of the air water removal path is 0.2-0.4 MPa, and the air source pressure of the hydrogen water removal path is 0.4-0.5 MPa.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model discloses a device for replacing the drying agent without stopping the machine between the gas output port of the hydrogen-air integrated machine and the gas input port of the online gas chromatograph, which can ensure the continuous supply of the air source during the replacement process without stopping the machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of a device for replacing the drying agent without stopping the machine in the environmental online monitoring system.

[0019] Mark No. : 1, first three-way valve; 2, first filter; 3, first check valve; 4, second filter; 5, second check valve; 6, third filter; 7, first stop valve; 8, fourth filter; 9, third three-way valve; 10, third check valve; 11, second stop valve; 12, fifth filter; 13, fourth three-way valve; 14, fourth check valve; 15, pressure container; 16, pressure stabilizing valve. DETAILED DESCRIPTION

[0020] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The drawings show preferred embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0022] The specific embodiments of the present application will be described below with reference to the drawings.

[0023] Embodiment 1

[0024] In the present embodiment, a device for replacing the desiccant of an environmental online monitoring system without stopping is proposed. Please refer to Figure 1 The device for replacing the desiccant of an environmental online monitoring system without stopping includes an air water removal path and a hydrogen water removal path connected with a hydrogen-air integrated machine.

[0025] Please refer to Figure 1 The air water removal path includes a first three-way valve 1 connected with an air interface in the hydrogen-air integrated machine. In addition to one interface connected with the air source, the remaining two interfaces are respectively connected with a first filter 2 and a second filter 4.

[0026] Please continue to refer to Figure 1 The first filter 2 has a first check valve 3 on the discharge side, and the second filter 4 has a second check valve 5 on the discharge port. The air water removal path further includes a third filter 6 connected with the first check valve 3 and the second check valve 5.

[0027] Further explanation, the air water removal path has two groups of filter systems, which are respectively a first group of filter systems composed of the first filter 2, the first check valve 3 and the third filter 6, and a second group of filter systems composed of the second filter 4, the second check valve 5 and the third filter 6.

[0028] Further, the first set of filter systems and the second set of filter systems in the air water removal path can participate in filtering under the switching of the first three-way valve 1, but it should be noted that only one set of filter systems in the air water removal path participates in filtering, and the other set of filter systems to be involved in filtering is replaced after being saturated with water.

[0029] In the present embodiment, the first one-way valve 3 and the second one-way valve 5 can avoid interference with the other set of filter systems that is participating in filtering when replacing the filter element in any one set of filter systems. In addition, the third filter element 6 is filled with molecular sieve and activated carbon, which can further remove impurities from the air and also serve as a pressure accumulator to prevent signal noise caused by fluctuations in the gas source pressure.

[0030] Please refer to Figure 1 , the hydrogen water removal path includes a first stop valve 7 and a second stop valve 11 connected to the hydrogen interface in the hydrogen-air all-in-one machine, wherein the first stop valve 7 is provided with a fourth filter element 8, and the fourth filter element 8 has a third three-way valve 9 at the outlet, and the remaining two interfaces of the third three-way valve 9 are respectively connected to a third one-way valve 10 and a gas resistance of 0.1 MPa, 50 ml / min; the second stop valve 11 is provided with a fifth filter element 12, and the fifth filter element 12 has a fourth three-way valve 13 at the outlet, and the remaining two interfaces of the fourth three-way valve 13 are respectively connected to a fourth one-way valve 14 and a gas resistance of 0.1 MPa, 50 ml / min; the hydrogen water removal path further includes a pressure vessel 15 connected to the third one-way valve 10 and the fourth one-way valve 14, and the pressure vessel 15 is connected to a pressure stabilizing valve 16.

[0031] Please refer to Figure 1 , the hydrogen water removal path has a first set of filter systems composed of the first stop valve 7, the fourth filter element 8, the third three-way valve 9, and the third one-way valve 10; and a second set of filter systems composed of the second stop valve 11, the fifth filter element 12, the fourth three-way valve 13, and the fourth one-way valve 14.

[0032] Further, the first set of filter systems and the second set of filter systems in the hydrogen water removal path can participate in filtering under the control of the stop valves in the corresponding systems. Specifically, the first stop valve 7 is opened, the second stop valve 11 is closed, and hydrogen with a gas source pressure of 0.4-0.5 MPa enters the second set of filter systems composed of the fifth filter element 12 for water removal filtering. Conversely, the first stop valve 7 is closed, the second stop valve 11 is opened, and hydrogen with a gas source pressure of 0.4-0.5 MPa enters the first set of filter systems composed of the fifth filter element 12 for water removal filtering.

[0033] Further, the hydrogen filtered by the first set of filter systems and the second set of filter systems in the hydrogen water removal path is passed through the pressure container 15, and then is output to the online gas chromatograph after being stabilized to 0.2-0.3 MPa by the pressure stabilizing valve 16.

[0034] In the embodiment, the fourth filter 8 and the fifth filter 12 are made of neutral solid water removal filler, and the A-R interface of the third three-way valve 9 and the fourth three-way valve 13 is connected to the air resistance of 0.1 MPa and 50 ml / min, which can be used to remove the air remaining in the gas path after the filler is replaced.

[0035] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0036] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, however, it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A device for non-stop replacement of a drying agent for an environmental on-line monitoring system, characterized in that: The air water removal path and the hydrogen water removal path are connected with the hydrogen-air integrated machine, wherein the air water removal path and the hydrogen water removal path each have two sets of filter systems, one set of filter systems is involved in filtering, and the other set of filter systems is involved in filtering after the filter systems involved in filtering are saturated.

2. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 1, characterized in that: The air water removal path includes a first three-way valve connected with an air interface in the hydrogen-air integrated machine, the remaining two interfaces of the first three-way valve are respectively provided with a first filter and a second filter, the first filter has a first check valve at the discharge port, and the second filter has a second check valve at the discharge port. The air water removal path further includes a third filter connected with the first check valve and the second check valve.

3. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 2, characterized in that: The two sets of filter systems in the air water removal path are a first set of filter systems composed of the first filter, the first check valve and the third filter, and a second set of filter systems composed of the second filter, the second check valve and the third filter.

4. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 1, characterized in that: The hydrogen water removal path includes a first stop valve and a second stop valve connected with a hydrogen interface in the hydrogen-air integrated machine, wherein the first stop valve is provided with a fourth filter, the fourth filter has a third three-way valve at the discharge port, and the remaining two interfaces of the third three-way valve are respectively connected with a third check valve and a gas resistance; The second stop valve is provided with a fifth filter, the fifth filter has a fourth three-way valve at the discharge port, and the remaining two interfaces of the fourth three-way valve are respectively connected with a fourth check valve and a gas resistance; The hydrogen water removal path further includes a pressure container connected with the third check valve and the fourth check valve, and the pressure container is connected with a pressure stabilizing valve.

5. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 4, characterized in that: The two sets of filter systems in the hydrogen water removal path are a first set of filter systems composed of the first stop valve, the fourth filter, the third three-way valve and the third check valve, and a second set of filter systems composed of the second stop valve, the fifth filter, the fourth three-way valve and the fourth check valve.

6. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 4, characterized in that: The materials used for filtering in the fourth filter and the fifth filter are neutral solid water removal fillers.

7. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 4, characterized in that: The third three-way valve and the fourth three-way valve are connected with a gas resistance of 0.1Mpa and 50ml / min.

8. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 1, characterized in that: The ends of the air water removal path and the hydrogen water removal path are online gas chromatographs.

9. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 2, characterized in that: The material used for filtering in the third filter is molecular sieve and activated carbon.

10. The device for replacing the desiccant without stopping the on-line environmental monitoring system according to claim 1, characterized in that: The air source pressure of the air water removal path is 0.2-0.4MPa, and the air source pressure of the hydrogen water removal path is 0.4-0.5MPa.

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