A gas sample introduction and water washing impurity removal device

Abstract

This utility model discloses a gas sampling and water washing purification device, which includes: a sample gas pipeline, a water washing pipeline, a Venturi tube, a water washing tank, a gas-liquid separator, and a drying tube. The water washing tank has an inlet and an outlet at its top. Both the sample gas pipeline and the water washing pipeline are connected to the inlet through the outlet section of the Venturi tube, and the outlet is connected to the gas-liquid separator. The sample gas pipeline is connected to the low-pressure point of the Venturi tube, and the water washing pipeline is connected to the inlet section of the Venturi tube. After the sample gas flows through the sample gas pipeline to the Venturi tube, it is then introduced into the water washing tank by the washing water. The gas-liquid separator is connected to the drying tube and is used to separate residual water from the sample gas after water washing and purification. This device has a simple structure and can effectively remove dust, triethylaluminum, and moisture from the sample gas. The purified sample gas can be directly introduced into an instrument for analysis and measurement.

Description

Technical Field

[0001] This utility model relates to the field of analytical instrument technology, and in particular to a gas injection water washing and impurity removal device. Background Technology

[0002] Process gases generated during chemical production often contain large amounts of dust particles or trace amounts of active organometallic compounds such as triethylaluminum (TEA). TEA readily reacts with air or moisture to form oxides. Traditional mechanical filtration devices have significant limitations: insufficient efficiency in retaining ultrafine dust and inability to effectively remove TEA and its derivatives. When these impurities enter flow meters, control valves, and other instrumentation equipment along with the process gas, tiny particles gradually accumulate at throttling elements, causing blockages in the measurement channels and resulting in inaccurate measurement results, affecting the accuracy and safety of measurements. Utility Model Content

[0003] Objective: In order to overcome the shortcomings of the existing technology, this utility model provides a gas injection water washing and impurity removal device to remove dust, triethylaluminum and moisture from the sample gas.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a gas sampling and water washing device for impurity removal. The impurity removal includes removing dust, triethylaluminum and water from the sample gas. The device includes: a sample gas pipeline, a water washing pipeline, a venturi tube, a water washing tank, a gas-liquid separator and a drying tube.

[0006] The top of the washing tank is provided with a sample inlet and a sample outlet. The sample gas pipeline and the washing pipeline are both connected to the sample inlet through the outlet section of a venturi tube, and the sample outlet is connected to the gas-liquid separator.

[0007] The sample gas pipeline is connected to the low-pressure point of the Venturi tube, and the water washing pipeline is connected to the inlet section of the Venturi tube. After the sample gas flows to the Venturi tube through the sample gas pipeline, it is driven into the water washing tank by the cleaning water introduced by the water washing pipeline.

[0008] The outlet of the gas-liquid separator is connected to a drying tube for separating residual water in the sample gas after water washing and impurity removal.

[0009] The drying tube is used to further dry the sample gas that has been washed and purified by water.

[0010] This device combines the synergistic design of a Venturi tube and a water washing tank. The washing water carries the sample gas into the water washing tank, and after drying, it is sent to the measuring instrument. This synergistic design captures and retains dust, triethylaluminum, and water in the sample gas, preventing contamination of the measuring instrument. The Venturi tube generates negative pressure based on its own Venturi effect, automatically drawing in the sample gas without the need for additional pumping equipment, making it energy-saving and environmentally friendly.

[0011] In some embodiments, the water washing pipeline includes a first ball valve and a first pressure reducing valve connected in sequence. The washing water is controlled by the first ball valve, then the pressure is adjusted by the first pressure reducing valve, and finally the sample gas is carried into the water washing tank through the venturi tube.

[0012] In some embodiments, the sample gas pipeline includes a second ball valve and a second pressure reducing valve connected in sequence. The sample gas passes through the control switch of the second ball valve, then the pressure is adjusted by the second pressure reducing valve, and finally enters the water washing tank under the action of the cleaning water after passing through the low-pressure point of the venturi tube.

[0013] In some embodiments, an overflow pipe is provided on the upper side of the washing tank for discharging wastewater when the wastewater in the washing tank reaches a threshold; a drain valve is provided on the lower side of the other side of the washing tank for periodically removing solid impurities deposited at the bottom of the tank; a discharge pipe is provided at the bottom of the gas-liquid separator for discharging water trapped in the gas-liquid separator; a needle valve is provided on the discharge pipe for adjusting the flow rate of the discharged wastewater, and when the opening of the needle valve is properly adjusted, the gas in the pipe rises and the water in the gas-liquid separator flows downward.

[0014] In some embodiments, the drying tube is filled with a drying material for drying the gas. Preferably, in some embodiments, the drying material is color-changing absorbent silica gel, which becomes ineffective after absorbing water and changing color, and can be replaced promptly according to the color.

[0015] In some embodiments, a molecular sieve and a PTFE filter membrane are provided at one end of the drying tube near the measuring instrument. After the sample gas flows through the drying material, it flows out of the drying tube through the molecular sieve and the PTFE filter membrane. The PTFE filter membrane is used to filter the dust from the molecular sieve in the sample gas.

[0016] In some embodiments, the drying tube is made of a transparent material.

[0017] In some embodiments, a flow meter is also connected between the drying tube 4 and the measuring instrument 5.

[0018] Beneficial effects:

[0019] The gas sampling and water washing device provided by this utility model, based on a venturi tube and a water washing tank, achieves efficient removal of dust, triethylaluminum, and water from the sample gas. It features a simple structure, high removal rate, and the sample gas, after water washing and impurity removal, can be directly introduced into the instrument for analysis and measurement. Triethylaluminum reacts directly with water, generating harmless solids and gases through the water washing process. The venturi tube design eliminates the need for an additional power source and improves the thorough mixing and washing of the sample gas and cleaning water, enhancing the impurity removal effect. The entire device is highly efficient, energy-saving, and has low production costs, making it suitable for industrial production and possessing broad market prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the gas injection and water washing impurity removal device in this embodiment of the present invention.

[0022] In the diagram: 1. Venturi tube; 2. Washing tank; 21. Inlet; 22. Outlet; 23. Overflow pipe; 3. Gas-liquid separator; 31. Discharge pipe; 311. Needle valve; 4. Drying tube; 5. Measuring instrument; 61. First ball valve; 62. First pressure reducing valve; 71. Second ball valve; 72. Second pressure reducing valve; 8. Flow meter; 9. Drain valve. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may include different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] Example 1:

[0026] This embodiment provides a gas sampling and water washing device for impurity removal. The impurity removal includes removing dust, triethylaluminum, and water from the sample gas. The device includes: a sample gas pipeline, a water washing pipeline, a Venturi tube 1, a water washing tank 2, and a gas-liquid separator 3. The top of the water washing tank 2 has an inlet 21 and an outlet 22. Both the sample gas pipeline and the water washing pipeline are connected to the inlet 21 through the outlet section of the Venturi tube 1, and the outlet 22 is connected to the gas-liquid separator 3. The sample gas pipeline is connected to the low-pressure point of the Venturi tube 1, and the water washing pipeline is connected to the inlet section of the Venturi tube 1. After the sample gas flows through the sample gas pipeline to the Venturi tube 1, it is driven into the water washing tank 2 by the washing water introduced by the water washing pipeline. The outlet of the gas-liquid separator 3 is connected to a drying tube 4 for separating residual water in the sample gas after water washing and impurity removal.

[0027] The water washing pipeline includes a first ball valve 61 and a first pressure reducing valve 62 connected in sequence. The washing water is controlled by the first ball valve 61, then the pressure is adjusted by the first pressure reducing valve 62, and finally the sample gas is carried into the water washing tank 2 through the venturi tube 1.

[0028] The sample gas pipeline includes a second ball valve 71 and a second pressure reducing valve 72 connected in sequence. The sample gas passes through the control switch of the second ball valve 71, then the pressure is adjusted by the second pressure reducing valve 72, and finally enters the water washing tank 2 under the action of the cleaning water after passing through the low pressure point of the venturi tube 1.

[0029] A drying tube 4 and a flow meter 8 are connected in sequence between the gas-liquid separator 3 and the measuring instrument 5; the drying tube 4 is filled with color-changing water-absorbing silica gel.

[0030] Furthermore, the drying tube 4 is made of transparent material, and a molecular sieve and a PTFE filter membrane are provided at one end of the tube near the measuring instrument 5. After the sample gas flows through the drying material, it flows out of the drying tube 4 through the molecular sieve and the PTFE filter membrane. The PTFE filter membrane is used to filter the dust from the molecular sieve in the sample gas.

[0031] Working Principle: In this gas sample introduction and water washing device, the washing water introduced through the washing pipeline flows sequentially through the constriction section and throat of the Venturi tube 1, where the flow rate increases and the pressure decreases. After the sample gas is introduced, the dust in the sample gas impacts the water droplets due to inertia and is captured by the washing water, then falls into the washing tank 2 under the influence of gravity. Furthermore, the air pressure at the diffuser section of the Venturi tube 1 is higher than that at the throat, causing the washing water to form a water mist as it passes through the diffuser section of the Venturi tube 1. This mist collides with and condenses with the dust in the sample gas, settling into the washing tank 2.

[0032] Triethylaluminum reacts violently with water, releasing a large amount of heat. The sample gas contains only a small amount of triethylaluminum. Therefore, when the washing water and sample gas are simultaneously introduced into the water washing tank 2, the triethylaluminum in the sample gas can be removed, and the heat generated by the reaction can be carried away, preventing the generated oxides from depositing and clogging the pipeline.

[0033] The sample gas still contains a small amount of moisture after being washed and purified with water. After being dried by the gas-liquid separator 3 and the drying tube 4, the dust, triethylaluminum and moisture in the sample gas are effectively removed.

[0034] Example 2:

[0035] This embodiment, based on Embodiment 1, provides an optimized structure for the washing tank 2, such as... Figure 1 As shown: The upper right side of the washing tank 2 is provided with an overflow pipe 23, which is used to discharge wastewater when the wastewater in the washing tank 2 reaches the threshold; the lower left side of the washing tank 2 is also provided with a drain valve 9, which is used to periodically remove solid impurities deposited at the bottom of the tank; the bottom of the gas-liquid separator 3 is also provided with a discharge pipe 31, which is used to discharge the water trapped in the gas-liquid separator 3; the discharge pipe 31 is provided with a needle valve 311, which is used to adjust the flow rate of the discharged wastewater. When the opening of the needle valve 311 is properly adjusted, the gas in the pipe rises and the water in the gas-liquid separator 3 flows downward.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gas sampling water scrubbing impurity removal device, characterized in that, The device includes: a sample gas pipeline, a water washing pipeline, a venturi tube, a water washing tank, a gas-liquid separator, and a drying tube; The top of the washing tank is provided with a sample inlet and a sample outlet. The sample gas pipeline and the washing pipeline are both connected to the sample inlet through the outlet section of a venturi tube, and the sample outlet is connected to the gas-liquid separator. The sample gas pipeline is connected to the low-pressure point of the venturi tube, and the water washing pipeline is connected to the inlet section of the venturi tube. After the sample gas flows to the venturi tube through the sample gas pipeline, it is driven into the water washing tank by the cleaning water introduced by the water washing pipeline. The outlet of the gas-liquid separator is connected to a drying tube for separating residual water in the sample gas after water washing and impurity removal; the drying tube is used to further dry the sample gas after water washing and impurity removal.

2. The gas sampling water scrubber of claim 1, wherein, The water washing pipeline includes a first ball valve and a first pressure reducing valve connected in sequence. The washing water is controlled by the first ball valve, then the pressure is adjusted by the first pressure reducing valve, and finally the sample gas is carried into the water washing tank through the venturi tube.

3. The gas sampling water scrubber of claim 2, wherein, The sample gas pipeline includes a second ball valve and a second pressure reducing valve connected in sequence. The sample gas passes through the control switch of the second ball valve, then the pressure is adjusted by the second pressure reducing valve, and finally enters the water washing tank under the action of the cleaning water after passing through the low pressure point of the venturi tube.

4. The gas sampling water scrubber device according to claim 1 or 2 or 3, characterized in that, An overflow pipe is provided on the upper side of the washing tank to discharge wastewater when the wastewater in the washing tank reaches a threshold; a drain valve is provided on the lower side of the other side of the washing tank to periodically discharge solid impurities deposited at the bottom of the tank. The bottom of the gas-liquid separator is also equipped with a discharge pipe for discharging the water trapped in the gas-liquid separator; The discharge pipe is equipped with a needle valve to regulate the flow rate of the discharged wastewater.

5. The gas sampling water scrubber of claim 1, wherein, The drying tube is filled with drying material for drying gases.

6. The gas sampling water scrubber of claim 5, wherein, The drying tube is also equipped with a molecular sieve and a PTFE filter membrane at one end near the measuring instrument. After the sample gas flows through the drying material, it flows out of the drying tube through the molecular sieve and the PTFE filter membrane. The PTFE filter membrane is used to filter the dust from the molecular sieve in the sample gas.

7. The gas sampling water scrubber of claim 5, wherein, The drying tube is made of transparent material.

8. The gas sampling water scrubber of claim 5, wherein, A flow meter is also connected between the drying tube and the measuring instrument.

Images