Coal gas dewatering and drying device

Abstract

The utility model provides a coal gas dehydrating and drying device, which comprises a U-shaped pipe, a gas conveying pipeline, a water inlet pipe and a water outlet pipe, the demister is arranged in the U-shaped pipe and is used for removing water vapor in the coal gas; the dehydrator is arranged in the U-shaped pipe and is used for removing liquid water drops in the coal gas; the drainage pipe is arranged at the bottom of the U-shaped pipe; and the drainer is in pipe connection with the drainage pipe. According to the utility model, the U-shaped pipe is arranged in the gas transportation pipeline, and the demister and the dehydrator are arranged in the U-shaped pipe, so that water vapor and liquid water drops in the gas can be effectively removed. Therefore, the quality of the gas is improved, the stable combustion of the gas is ensured, and the problems of equipment corrosion, pipeline blockage and the like are avoided. Besides, by optimizing the structural design of the demister and the dehydrator, such as arranging a corrugated plate and a dripping eave, the dehydration efficiency is further improved, so that the moisture content in the coal gas is reduced to the minimum.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gas dehydration, in particular to a coal gas dehydration drying device. Background Art

[0002] Gas dehydration aims to reduce the moisture content in gas, ensuring that gas quality meets production standards. Gas dehydration equipment effectively removes moisture from gas, preventing problems such as combustion instability, equipment corrosion, and pipeline blockages caused by excessive moisture content. Gas dehydration equipment primarily operates based on physical or chemical methods, converting water vapor in the gas into liquid water through adsorption, condensation, and separation techniques, which are then discharged, thereby reducing the gas's humidity.

[0003] However, given the layout and usage of the existing converter gas pipeline network, pelletizing production lines using converter gas as fuel face the challenge of excessively high water content. This issue not only poses a safety risk to burner water spray fire extinguishing, but also affects the stability of the pelletizing thermal system and increases fuel consumption. Despite repeated inspections and maintenance of gas drainers at the power plant and ironworks, as well as improvements such as increasing the diameter of the gas downpipe bell, the high water content problem persists. Utility Model Content

[0004] The utility model aims to at least solve the technical problem of high water content in coal gas in the prior art, and particularly innovatively proposes a coal gas dehydration and drying device.

[0005] In order to achieve the above-mentioned purpose of the present invention, the present invention provides a coal gas dehydration and drying device, which is installed in a coal gas transportation pipeline; the device comprises:

[0006] A U-shaped pipe connected to the gas transportation pipeline;

[0007] a demister, disposed in the U-shaped tube, for removing water vapor from the coal gas;

[0008] a dehydrator, disposed in the U-shaped tube, for removing liquid water droplets from the coal gas;

[0009] A drainage pipe is provided at the bottom of the U-shaped pipe;

[0010] a drainer connected to the drain pipe;

[0011] The demister 2 is installed at the descending stage of the coal gas, and the dehydrator 3 is installed at the ascending stage of the coal gas.

[0012] As an optional embodiment of the present invention, optionally, the demister includes:

[0013] A first demisting layer is disposed in the U-shaped tube;

[0014] The second demisting layer is arranged in the U-shaped tube and close to the bottom of the first demisting layer.

[0015] As an optional embodiment of the present invention, optionally, the first demisting layer and the second demisting layer are both cylindrical structures, and the two diameters are equal, both equal to the inner diameter of the U-shaped tube.

[0016] As an optional embodiment of the present invention, optionally, a plurality of corrugated plates are installed in both the first demisting layer and the second demisting layer.

[0017] As an optional embodiment of the present invention, optionally, a dripping eave is further provided on the corrugated plate of the first demisting layer.

[0018] As an optional embodiment of the present invention, optionally, the dehydrator includes:

[0019] a fixed plate, disposed in the U-shaped tube;

[0020] A plurality of swirl blades are all fixedly arranged on the fixed plate at an angle;

[0021] A central blind plate is fixedly connected to the swirl blades.

[0022] The beneficial effect of this utility model lies in that, by installing a U-shaped tube in the gas transportation pipeline and installing a demister and dehydrator within the U-shaped tube, it can effectively remove water vapor and liquid water droplets from the gas. This not only improves the gas quality and ensures stable gas combustion, but also avoids problems such as equipment corrosion and pipeline blockage. In addition, by optimizing the structural design of the demister and dehydrator, such as the provision of corrugated plates and drip ridges, the dehydration efficiency is further improved, minimizing the moisture content in the gas.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of the utility model gas dehydration and drying device.

[0026] Figure 2 It is a schematic diagram of the installation structure of the demister of the utility model.

[0027] Figure 3It is a front view of the first demisting layer of the utility model.

[0028] Figure 4 It is a front view of the second demisting layer of the utility model.

[0029] Figure 5 It is a structural schematic diagram of the dehydrator of the utility model.

[0030] In the figure: 1. U-shaped tube; 2. demister; 201. first demisting layer; 2011. corrugated plate; 2012. drip eaves; 202. second demisting layer; 3. dehydrator; 301. center blind plate; 302. swirl blade; 303. fixing plate; 4. air inlet; 5. drain pipe; 6. drainer. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] like Figure 1 As shown, a gas dehydration and drying device is installed in a gas transportation pipeline; the device comprises:

[0033] A U-shaped tube 1 is connected to the gas pipeline; it is secured to the gas pipeline by welding. The inner diameter of the U-shaped tube 1 is larger than that of the gas pipeline, so it is welded to the gas pipeline via a bell-shaped air inlet 4. The installation of the U-shaped tube 1 creates a specific flow rate and pressure differential for the gas within the gas pipeline as it passes through the tube, thereby improving the efficiency of removing moisture from the gas.

[0034] like Figure 2As shown, the demister 2 is installed within the U-shaped tube 1 and is used to remove water vapor from the coal gas. The demister 2 comprises two demister layers: a first demister layer 201 and a second demister layer 202. Both layers are cylindrical, with a diameter equal to the inner diameter of the U-shaped tube 1. Each demister layer is equipped with a plurality of corrugated plates 2011, each with a corrugated angle of 124 degrees and a distance of two centimeters between each plate. The corrugated plates of the first demister layer 201 are also equipped with drip ridges 2012 to facilitate the collection and discharge of water droplets. The demister 2 is installed at the descending stage of the coal gas to effectively remove water vapor from the coal gas. The demisting principle of demister 2 is as follows: when gas containing mist flows through demister 2 at a constant speed, the inertial impact of the gas causes the mist to collide with corrugated plates 2011. When the resulting droplets become large enough to overcome the combined force of the gas's upward force and the liquid's surface tension, the droplets are then separated from the surface of corrugated plates 2011. The multi-directional structure of corrugated plates 2011 in demister 2 increases the chances of mist capture. Any mist that is not removed undergoes the same action at the next bend, and this repeated action significantly improves demisting efficiency.

[0035] like Figure 5 As shown, the dehydrator 3 is installed within the U-shaped tube 1 and is used to remove liquid water droplets from the coal gas. The dehydrator 3 comprises a fixed plate 303, a plurality of swirl blades 302, and a center blind plate 301. The swirl blades 302 are fixedly mounted on the fixed plate 303 at an angle of 55 degrees to the vertical, enhancing the centrifugal force of the water droplets and promoting their separation. The center blind plate 301 is fixedly connected to the swirl blades 302 to further ensure the collection and discharge of the water droplets. The dehydrator 3 is installed at the rising stage of the coal gas to effectively remove liquid water droplets from the coal gas. The dehydrator 3 works as follows: the dehydrator 3 is shaped like a windmill impeller and consists of a center blind plate 301 and tangential swirl blades 302 with a certain angle. The dehydrator 3 does not rotate on its own, but is fixed within the U-shaped tube 1. When the converter gas carrying water vapor passes through the swirl blades 302 with a certain inclination angle, a spiral airflow is generated. Small water droplets in the gas collide with each other to form large water droplets, which fall to the drain pipe 5 under the action of gravity and are discharged by the gas drainer 6, thereby achieving gas dehydration.

[0036] A drain pipe 5 is provided at the bottom of the U-shaped tube 1 ; a drain pipe 5 is provided at the bottom of the U-shaped tube 1 for draining liquid water formed during the dehydration process.

[0037] The drainer 6 is connected to the drain pipe 5. In this embodiment, the drainer 6 is a liquid water collection box.

[0038] like Figures 1 to 5As shown, when the gas dehydration and drying device of this embodiment is in use, the gas in the gas transport pipeline first enters the U-shaped tube 1 through the air inlet 4. The gas then moves toward the bottom of the U-shaped tube 1 at a certain speed. During this movement, it first passes through the demister 2, where the first and second demister layers 201 and 202 sequentially remove water vapor from the gas. The gas then continues to move downward, discharging the liquid water formed during the dehydration process through the drain pipe 5. After passing through the demister 2, the water vapor in the gas is effectively removed, and the gas then rises to the dehydrator 3. In the dehydrator 3, due to the inclined setting of the swirl blades 302, the liquid water droplets in the gas are separated by mutual collision and fall into the drain pipe 5 under the action of gravity. Finally, the dehydrated gas is discharged through the drain pipe 6, ensuring the quality of the gas and stable combustion.

[0039] The optimized design of the coal gas dehydration and drying device in this embodiment not only improves coal gas quality and removes moisture from the gas, but also effectively prevents problems such as equipment corrosion and pipe blockage. Furthermore, the provision of corrugated plates and drip ridges further enhances dehydration efficiency, minimizing the moisture content in the coal gas. This device has a simple structure, is easy to install and maintain, and offers high practical value and economic benefits.

[0040] As an optional embodiment of the present invention, optionally, the demister 2 includes:

[0041] The first demisting layer 201 is arranged in the U-shaped tube 1; Figure 2 and 3 As shown, Figure 3 This is a front view of the first demisting layer 201. The first demisting layer 201 is installed on the second demisting layer 202. The coal gas first passes through the first demisting layer 201 for preliminary demisting, and then passes through the second demisting layer 202 for further demisting. The first demisting layer 201 is composed of several corrugated plates 2011. The corrugated plates 2011 are fixed as a whole by fixing clips on the periphery to form a cylindrical structure. The coal gas passes through the middle of the cylindrical structure and passes through the corrugated plates 2011 for demisting.

[0042] The second demisting layer 202 is disposed in the U-shaped tube 1 and close to the bottom of the first demisting layer 201. Figure 2 and 4 As shown, Figure 4 2 is a front view of the first demisting layer 201. The structure of the second demisting layer 202 is similar to that of the first demisting layer 201. The only difference is that the first demisting layer 201 is provided with a dripping eave 2012, while the second demisting layer 202 is not provided with one.

[0043] As an optional embodiment of the present invention, optionally, the first demisting layer 201 and the second demisting layer 202 are both cylindrical structures, and the two diameters are equal, both equal to the inner diameter of the U-shaped tube 1.

[0044] By installing the first demisting layer 201 and the second demisting layer 202 above and below, the gas passes through two demisting layers for demisting, ensuring efficient removal of moisture from the gas. Furthermore, the carefully designed angles and spacing of the corrugated plates 2011 ensure that the mist in the gas more easily aggregates into larger droplets upon impact with the plates, which then separate from the plates under gravity, further improving demisting efficiency.

[0045] As an optional embodiment of the present invention, optionally, a plurality of corrugated plates 2011 are installed in both the first demisting layer 201 and the second demisting layer 202 .

[0046] As an optional embodiment of the present invention, optionally, the waveform angle of the corrugated plate 2011 is one hundred and twenty-four degrees. Figure 4 The waveform angle shown refers to the angle in the middle of the waveform plate 2011.

[0047] like Figure 3 and 4 As shown, the corrugated plates 2011 in both the first and second demisting layers 201, 202 have a corrugated angle of 124 degrees. This carefully designed corrugated angle ensures that the mist in the gas is more easily aggregated into larger droplets upon impact with the corrugated plates, thereby separating from the plate surfaces under the action of gravity, further improving demisting efficiency. Furthermore, the corrugated plates 2011 are spaced two centimeters apart. This design ensures sufficient collision area while avoiding excessive resistance, allowing the gas to pass smoothly through the demisting layers. In this embodiment, the corrugated plates 2011 of the demister 2 employ a multi-fold structure, increasing the chances of mist capture.

[0048] As an optional embodiment of the present invention, optionally, the distance between the corrugated plates 2011 and the corrugated plates 2011 is two centimeters.

[0049] like Figure 3 and 4 As shown, the distance between the corrugated plates 2011 is designed to be two centimeters, which not only ensures a sufficient collision area but also avoids excessive resistance, allowing the gas to pass through the demisting layer smoothly.

[0050] As an optional embodiment of the present invention, optionally, a dripping eave 2012 is further provided on the corrugated plate of the first demisting layer 201 .

[0051] like Figure 3As shown, a drip eave 2012 is installed on the corrugated plate of the first demisting layer 201 to easily collect and drain water droplets on the first demisting layer 201. The provision of drip eaves 2012 further ensures that liquid water droplets formed during the demisting process can be effectively collected and drained, preventing water droplets from re-entering the gas flow, thereby improving demisting efficiency and gas quality.

[0052] As an optional embodiment of the present invention, optionally, the dehydrator 3 includes:

[0053] The fixing plate 303 is arranged in the U-shaped tube 1; Figure 5 As shown, the fixing plate 303 is a circular plate with an outer periphery, and the ends of all the swirl blades 302 are fixed on the fixing plate 303 .

[0054] Several swirl blades 302 are fixedly mounted at an angle on the fixed plate 303. One end of each swirl blade 302 is fixed to the fixed plate 303, and the other end is fixed to the center blind plate 301. The tips of the swirl blades 302 are tilted counterclockwise, creating centrifugal force during the rotation of the coal gas passing through the swirl blades 302, thereby separating the liquid water droplets. Due to the optimized tilt angle and spacing of the swirl blades 302, the liquid water droplets in the coal gas are effectively separated by collision and centrifugal force, and then fall into the drain pipe 5 under the influence of gravity. Furthermore, the tilt of the swirl blades 302 reduces resistance to the coal gas flow, ensuring smooth passage of the coal gas through the dehydrator 3.

[0055] The center blind plate 301 is fixedly connected to the swirl blades 302. The center blind plate 301 is a cylindrical barrel. The gas cannot pass through the center blind plate 301. All gas can only pass through the gaps between the swirl blades 302. The center blind plate 301 allows the gas to flow more evenly when passing through the swirl blades 302, thereby improving the dehydration efficiency.

[0056] As an optional embodiment of the present invention, the swirl blades 302 may optionally be angled at a 55-degree angle with the vertical. In this embodiment, the swirl blades 302 of the dehydrator 3 are angled at a 55-degree angle with the vertical. This angle was chosen based on in-depth research and experimental verification of the dynamic characteristics of coal gas flow, ensuring that water droplets are effectively separated under the action of centrifugal force. The structural design of the dehydrator 3 ensures that liquid water droplets in the coal gas generate sufficient centrifugal force when passing through the swirl blades 302, allowing the water droplets to fall smoothly into the drain pipe 5 under the action of gravity.

[0057] As an optional embodiment of the present invention, optionally, the device further includes an air inlet 4, and the air inlet 4 is a bell mouth.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gas dehydration and drying device, which is installed in a gas transportation pipeline; characterized in that: The device comprises: A U-shaped pipe (1) connected to the gas transportation pipeline; A demister (2) is provided in the U-shaped tube (1) and is used to remove water vapor from the coal gas; a dehydrator (3), disposed in the U-shaped tube (1), for removing liquid water droplets from the coal gas; A drainage pipe (5) is arranged at the bottom of the U-shaped pipe (1); A drainer (6) connected to the drain pipe (5); The demister (2) is installed at the coal gas descending stage, and the dehydrator (3) is installed at the coal gas ascending stage.

2. A gas dehydration and drying device according to claim 1, characterized in that: The demister (2) comprises: A first demisting layer (201) is disposed in the U-shaped tube (1); The second demisting layer (202) is arranged in the U-shaped tube (1) and is close to the bottom of the first demisting layer (201).

3. A gas dehydration and drying device according to claim 2, characterized in that: The first demisting layer (201) and the second demisting layer (202) are both cylindrical structures, and both have the same diameter, which is equal to the inner diameter of the U-shaped tube (1).

4. A gas dehydration and drying device according to claim 2, characterized in that: A plurality of corrugated plates (2011) are installed in both the first demisting layer (201) and the second demisting layer (202).

5. A gas dehydration and drying device according to claim 4, characterized in that: The waveform angle of the corrugated plate (2011) is one hundred and twenty-four degrees.

6. The coal gas dehydration and drying device according to claim 4, characterized in that: The distance between the corrugated plates (2011) is two centimeters.

7. The coal gas dehydration and drying device according to claim 4, characterized in that: The corrugated plate of the first demisting layer (201) is further provided with a dripping eave (2012).

8. The coal gas dehydration and drying device according to claim 1, characterized in that: The dehydrator (3) comprises: A fixed plate (303) is arranged inside the U-shaped tube (1); A plurality of swirl blades (302) are all fixedly arranged on the fixed plate (303) in an inclined manner; The central blind plate (301) is fixedly connected to the swirl blade (302).

9. The coal gas dehydration and drying device according to claim 8, characterized in that: The angle between the swirl blade (302) and the vertical direction is fifty-five degrees.

10. The coal gas dehydration and drying device according to claim 1, characterized in that: The device further comprises an air inlet (4), which is a bell-shaped port.

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