Monitoring system for operation state of adsorption column

Abstract

The utility model provides a monitoring system for the operation state of an adsorption column, and aims to monitor the dew point of hydrogen recovered and adsorbed in polycrystalline silicon production on line and solve the technical problems that on-site sampling equipment has the risks of leakage, combustion, explosion and the like and the safety risk of personnel operation is increased. The monitoring system comprises: a branch pipe, one end of which is connected to a hydrogen outlet pipeline of an adsorption tower; the pressure regulating valve is arranged on the branch pipe; the input end of the dew point sensor is connected with the other end of the branch pipe; one end of the discharge pipeline is connected to the dew point sensor; the pressure gauge is arranged on the discharge pipeline; the flow meter is arranged on the discharge pipeline; the flow regulating valve is arranged on the discharge pipeline and is positioned between the pressure gauge and the flow meter; and the meter head is electrically connected with the dew point sensor. The monitoring system has the advantages that the hydrogen generated by the adsorption column can be detected in real time, and the operation reliability of the adsorption column is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of gas detection systems, specifically to a kind of monitoring system of adsorption column operating state. BACKGROUND

[0002] In the production of polysilicon in China, the new structure adsorption column is used for recovery of polysilicon tail gas, to solve the problem of low heat exchange efficiency of equipment, affecting the regeneration and adsorption efficiency of adsorbent in the tail gas recovery adsorption and regeneration process.

[0003] In the process of adsorption column operation, when the water pressure is greater than the pressure of the medium to be adsorbed, water will penetrate into the pipeline when the internal fault of the adsorption column occurs, which will cause water to enter the subsequent process and cause safety accidents.

[0004] In the production process, the product after adsorption of the adsorption column is hydrogen, and the sampling device installed on site has the risk of leakage, combustion and explosion. At the same time, due to the limitation of the site environment, the increase of personnel operation in the operation has safety risks, and the device needs to realize long-period detection. UTILITY MODEL CONTENT

[0005] In view of the technical problems of leakage, combustion and explosion of the sampling equipment on site, and the safety risk of increasing personnel operation, the utility model provides a monitoring system of adsorption column operating state, which has the advantages of real-time detection of hydrogen generated by adsorption column and improvement of adsorption column operating reliability.

[0006] The technical scheme of the utility model is:

[0007] A monitoring system of adsorption column operating state comprises:

[0008] A branch pipe is connected to the hydrogen outlet pipeline of the adsorption tower at one end;

[0009] A pressure regulating valve is arranged on the branch pipe;

[0010] A dew point sensor is connected to the other end of the branch pipe at the input end;

[0011] An exhaust pipeline is connected to the dew point sensor at one end;

[0012] A pressure gauge is arranged on the exhaust pipeline;

[0013] A flow meter is arranged on the exhaust pipeline;

[0014] A flow regulating valve is arranged on the exhaust pipeline and located between the pressure gauge and the flow meter;

[0015] A meter head is electrically connected to the dew point sensor.

[0016] Optionally, further comprising:

[0017] An explosion-proof terminal box is electrically connected with the meter head.

[0018] Optionally, the explosion-proof terminal box is internally provided with a wireless transmission module.

[0019] Optionally, further comprising:

[0020] A nitrogen gas input pipe is connected to the pressure regulating valve through a reversing tee valve at one end;

[0021] A nitrogen gas valve is arranged on the nitrogen gas input pipe;

[0022] The branch pipe is provided with a hydrogen gas valve.

[0023] Optionally, further comprising:

[0024] A nitrogen gas venting pipeline is in communication with the middle part of the nitrogen gas input pipe at one end and is provided with an inlet and outlet tee valve at the communication position.

[0025] Optionally, further comprising:

[0026] A filter is arranged on the branch pipe and is located upstream of the pressure regulating valve.

[0027] Optionally, the filter is further provided with a hydrogen gas venting pipeline, and the hydrogen gas venting pipeline is provided with a venting valve.

[0028] Optionally, the hydrogen gas venting pipeline is further provided with a venting flowmeter.

[0029] Optionally, all the components are arranged in a box.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] The hydrogen gas outlet pipeline of the adsorption tower is connected with the branch pipe, the hydrogen gas produced by the adsorption tower is led out, the dew point sensor is arranged on the branch pipe, the hydrogen gas can be led into the dew point sensor, the temperature of the hydrogen gas is detected in the dew point sensor, the flow rate and pressure of the hydrogen gas entering the dew point sensor are adjusted through the pressure regulating valve arranged on the branch pipe and the flow regulating valve arranged on the discharge pipeline, and finally the measured temperature value is displayed through the meter head.

[0032] One detection system can be arranged on each adsorption column, so that the water content in the hydrogen gas after being adsorbed by the adsorption column can be detected in real time, whether water has penetrated into the adsorption column and the pipeline can be judged, whether the internal structure of the adsorption column is complete can be analyzed, and the reliability and safety of the entire adsorption system can be improved through the arrangement of multiple detection systems. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0034] Figure 1 The structure of the present application is shown in the figure. DETAILED DESCRIPTION

[0035] In the following, only some exemplary embodiments are simply described. As those skilled in the art can realize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0036] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0037] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] Embodiment:

[0039] Referring to Figure 1 A monitoring system for the operating state of an adsorption column, comprising a box body 1, and a branch pipe 2, a pressure regulating valve 3, a dew point sensor 4, a discharge pipeline 5, a pressure gauge 6, a flow meter 7, a flow regulating valve 8 and a meter head 9 arranged in the box body 1. Specifically, one end of the branch pipe 2 penetrates out of the box body 1 and is connected to the hydrogen outlet pipeline of the adsorption tower, and the other end is connected to the input end of the dew point sensor 4.

[0040] The pressure regulating valve 3 is arranged on the branch pipe 2, and the hydrogen pressure entering the dew point sensor 4 is adjusted through the pressure regulating valve 3, so that the pressure of the hydrogen is between 0.4MPa-0.8MPa.

[0041] One end of the exhaust pipeline 5 is communicated with the output end of the dew point sensor 4, and a pressure gauge 6, a flow meter 7 and a flow regulating valve 8 are arranged on the exhaust pipeline 5, and the other end of the exhaust pipeline 5 penetrates out of the box 1. The pressure value of the hydrogen gas passing through the dew point sensor 4 is monitored by the pressure gauge 6 arranged on the exhaust pipeline, and the flow of the hydrogen gas entering the dew point sensor 4 is regulated by the flow regulating valve 8, and the flow of the hydrogen gas passing through the dew point sensor 4 is monitored by the flow meter 7.

[0042] Finally, the meter head 9 is electrically connected with the dew point sensor 4, and the value measured by the dew point sensor 4 is displayed by the meter head 9.

[0043] The dew point sensor 4 is an instrument capable of directly measuring the dew point temperature, and belongs to a kind of temperature and humidity sensors. The meter head 9 directly displays the temperature value measured by the dew point sensor 4.

[0044] In the embodiment, the dew point of the hydrogen gas is below -70℃, but because the chlorosilane in the hydrogen gas cannot be completely cleaned by the adsorption tower, a small amount of silane is contained in the hydrogen gas, which reacts with water to reduce the water content and cause the dew point temperature to be lower than -80℃. Therefore, whether the hydrogen gas contains silane can be calculated by measuring the dew point temperature of the hydrogen gas.

[0045] The branch pipe 2 is connected to the hydrogen gas outlet pipeline of the adsorption tower, and the hydrogen gas produced by the adsorption tower is led out, and the dew point sensor 4 is arranged on the branch pipe 2, so that the hydrogen gas can be introduced into the dew point sensor 4, and the dew point temperature of the hydrogen gas is detected in the dew point sensor 4.

[0046] One of the detection systems can also be installed on each adsorption column, so that the water content in the hydrogen gas after being adsorbed by the adsorption column can be detected in real time, whether water has penetrated into the adsorption column can be judged, so that whether the internal structure is intact can be analyzed, and whether the adsorption column meets the adsorption requirement can also be detected in time. By arranging multiple detection systems, the reliability and safety of the entire adsorption system can be improved.

[0047] In one specific embodiment:

[0048] The monitoring system further comprises an explosion-proof junction box 10, wherein the explosion-proof junction box 10 is electrically connected with the meter head 9. The explosion-proof junction box 10 is installed for power supply and information transmission, and can also prevent spark ignition to meet the explosion-proof requirement.

[0049] A wireless transmission module is arranged in the explosion-proof junction box 10, so that information transmission can be realized.

[0050] In another specific embodiment:

[0051] The monitoring system further comprises a nitrogen input pipe 11, a nitrogen valve 12 and a hydrogen valve 13, wherein one end of the nitrogen input pipe 11 is connected to the pressure regulating valve 3 through a reversing tee valve 14, the branch pipe 2 is also connected to the reversing tee valve 14, and the hydrogen valve 13 is arranged on the branch pipe 2 and is upstream of the reversing tee valve 14.

[0052] In the embodiment, by designing the nitrogen input pipe 11, nitrogen can be introduced into the dew point sensor 4 and various pipelines before hydrogen is monitored, and the reversing tee valve 14, the nitrogen valve 12 and the hydrogen valve 13 are arranged to guide the flow direction of the gas in the pipelines.

[0053] In another specific embodiment,

[0054] The end of the discharge pipeline 5 away from the flow meter 7 needs to be connected to a hydrogen recovery pipeline, and therefore the monitoring system further comprises a nitrogen venting pipeline 16, one end of the nitrogen venting pipeline 16 is in communication with the middle part of the nitrogen input pipe 11, and an inlet and outlet tee valve 15 is arranged at the communication position, and when nitrogen is used to discharge air in the dew point sensor 4 and various pipelines, the air and nitrogen during the discharging process are discharged from the nitrogen venting pipeline 16.

[0055] In another specific embodiment,

[0056] The monitoring system further comprises a filter 17, which is arranged on the branch pipe 2 and is upstream of the pressure regulating valve. The filter 17 is arranged to improve the purity of hydrogen entering the dew point sensor 4.

[0057] Preferably, the filter 17 is further provided with a hydrogen venting pipeline 18, the hydrogen venting pipeline 18 is provided with a venting valve 19, and when it is necessary to discharge hydrogen in the dew point sensor 4 and various pipelines, the hydrogen is discharged through the hydrogen venting pipeline 18. The hydrogen venting pipeline 18 is further provided with a venting flow meter 19.

[0058] The above embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A monitoring system for the operating state of an adsorption column, characterized in that It comprises: a branch pipe, one end of which is connected to a hydrogen outlet pipeline of the adsorption tower; a pressure regulating valve, which is arranged on the branch pipe; a dew point sensor, an input end of which is connected to the other end of the branch pipe; a discharge pipeline, one end of which is connected to the dew point sensor; a pressure gauge, which is arranged on the discharge pipeline; a flow meter, which is arranged on the discharge pipeline; a flow regulating valve, which is arranged on the discharge pipeline and located between the pressure gauge and the flow meter; a meter head, which is electrically connected to the dew point sensor.

2. The system for monitoring the operating state of an adsorption column according to claim 1, characterized in that It further comprises: an explosion-proof junction box, which is electrically connected to the meter head.

3. The monitoring system for the operating state of the adsorption column according to claim 2, characterized in that: the explosion-proof junction box is internally provided with a wireless transmission module.

4. The system for monitoring the operating state of an adsorption column according to claim 1, characterized in that It further comprises: a nitrogen input pipe, one end of which is connected to the pressure regulating valve through a reversing tee valve; a nitrogen valve, which is arranged on the nitrogen input pipe; wherein the branch pipe is provided with a hydrogen valve.

5. The system for monitoring the operating state of an adsorption column according to claim 4, characterized in that It further comprises: a nitrogen venting pipeline, one end of which is in communication with the middle part of the nitrogen input pipe and is provided with an inlet and outlet tee valve at the communication position.

6. The system for monitoring the operating state of an adsorption column according to claim 1, characterized in that It further comprises: a filter, which is arranged on the branch pipe and located upstream of the pressure regulating valve.

7. The monitoring system for the operating state of the adsorption column according to claim 6, characterized in that: the filter is further provided with a hydrogen venting pipeline, and the hydrogen venting pipeline is provided with a venting valve.

8. The monitoring system for the operating state of the adsorption column according to claim 7, characterized in that: the hydrogen venting pipeline is further provided with a venting flow meter.

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