Gravity dewatering and deslagging explosion venting device

Abstract

The utility model relates to a gravity dewatering and deslagging explosion venting device which can discharge sewage on line and venting explosion. The bottom of the outer cylinder is supported and fixed through a support, an air inlet flange connecting pipe and an air outlet flange connecting pipe are installed on the side wall of the outer cylinder, an explosion venting opening and a flushing opening are formed in the top end of the outer cylinder, a filter screen is installed below the flushing opening in the outer cylinder, the inner cylinder is arranged in the outer cylinder, and a supporting frame is arranged on the lower portion in the outer cylinder. The lower end of the inner barrel is fixedly arranged on the supporting frame, the auger blade is arranged on the outer side wall of the inner barrel, the partition plate is oval and fixedly arranged on the upper portion of the inner barrel, a water guide hole is formed between the lower end of the partition plate and the outer barrel, a slag collecting well is connected to a slag discharging opening in the lower end of the outer barrel, and the upper end and the lower end of the slag collecting well are each provided with a valve. A combined form of two valves and a slag collecting well is adopted. By means of the opening sequence of the valves, the system pressure is isolated from the slag collecting well, no pressure leakage during slag discharging is achieved, and smooth sewage discharging is achieved.

Description

Technical Field

[0001] This utility model relates to a gravity dewatering device, and more particularly to a gravity dewatering slag discharge and explosion relief device that can discharge sewage online and can vent explosions. Background Technology

[0002] More than 60% of the methane in my country's coal mines is low-concentration methane, which is the gas source for low-concentration methane power generation. With the continuous improvement of low-concentration methane power generation technology, the low-concentration coalbed methane power generation industry will experience healthy and large-scale development, generating increasingly greater economic and social benefits.

[0003] Gravity dehydrators utilize the reduction in gas velocity and the change in direction of the gas flow to separate water droplets from the gas flow under the action of gravity and inertia. They are essential equipment for removing liquid water from methane gas and are necessary dewatering components in low-concentration methane power generation pipelines. When methane gas enters the dehydrator under a certain pressure, the airflow direction changes, generating a strong swirling motion and accelerating the gas velocity. Due to the density difference between methane gas and water, liquid water separates from the methane gas under the action of centrifugal force, centripetal force, and fluid drag. Existing gravity dehydrators have the following drawbacks: to discharge the separated water and particles, the dehydrator needs to be shut down and the drain valve opened to discharge the waste, leading to pressure leakage and affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a gravity dewatering slag discharge and explosion relief device. The device is equipped with two valves and a slag collection well between the two valves. By opening the two valves in sequence, the pressure inside the outer cylinder is kept leak-free, and online sewage discharge is achieved.

[0005] The technical solution of this utility model:

[0006] A gravity dewatering slag discharge and explosion relief device includes an outer cylinder, an inner cylinder, an inlet flange connector, an outlet flange connector, a filter screen, a flushing port, an explosion relief port, a slag collection well, two valves, and a partition. The bottom of the outer cylinder is supported and fixed by a bracket. The inlet flange connector and the outlet flange connector are installed on the side wall of the outer cylinder. An explosion relief port is provided at the top of the outer cylinder. A flushing port is provided on the outer cylinder next to the explosion relief port. A filter screen is installed below the flushing port inside the outer cylinder. The inner cylinder is set inside the outer cylinder. A support frame is provided in the lower part of the outer cylinder. The lower end of the inner cylinder is fixedly mounted on the support frame. Screw blades are installed on the outer side wall of the inner cylinder. The top of the inner cylinder is below the filter screen. The partition is elliptical and fixedly installed on the upper part of the inner cylinder. A water guide hole is provided between the lower end of the partition and the outer cylinder. The lower end of the outer cylinder is connected to the slag discharge port to the slag collection well. A valve is installed at each of the upper and lower ends of the slag collection well.

[0007] The beneficial effects of this utility model are:

[0008] 1. This application employs a combination of two worm gear butterfly valves and a slag collection well. By controlling the sequential opening of the worm gear butterfly valves, pressure leakage is eliminated during slag discharge, ensuring smooth wastewater removal.

[0009] 2. This application uses a drawer-type filter screen, which can be easily replaced without affecting the pipeline connection. This is especially important during the initial stage of system operation when there are many impurities in the pipeline, requiring the selection of a suitable filter screen and subsequent replacement later in the system's operation to meet the system's operational needs.

[0010] 3. This application is equipped with a flushing port, which is specifically designed for system operation, maintenance, and cleaning. Opening the flushing port to flush the filter screen can effectively reduce the time and labor intensity of filter screen removal and cleaning, reduce downtime, and quickly restore system operation.

[0011] 4. The design of the auger blades in this application accelerates the change in gas flow rate and direction, causing liquid water to precipitate along the inner wall of the outer cylinder and flow into the bottom through the 12mm gap on both sides. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the gravity dewatering, slag discharge, and explosion relief device of this application.

[0014] Figure 2 This is a schematic diagram of the overall structure of the gravity dewatering, slag discharge, and explosion relief device of this application.

[0015] Figure 3 This is a top view schematic diagram of the gravity dewatering, slag discharge, and explosion relief device of this application.

[0016] Figure 4 This is a schematic diagram of the drawer-type filter structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0017] Figure 5 This is a schematic diagram of the filter assembly structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0018] Figure 6 This is a side view of the drawer-type filter screen of the gravity dewatering slag discharge and explosion relief device in this application.

[0019] Figure 7This is a schematic diagram of the partition structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0020] Figure 8 This is a schematic diagram of the auger structure of the gravity dewatering, slag discharge, and explosion relief device in this application.

[0021] Figure 9 This is a schematic diagram of the flushing port structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0022] Figure 10 This is a schematic diagram of the slag collection well structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0023] Figure 11 This is a schematic diagram of the slag collection well structure of the gravity dewatering slag discharge and explosion relief device in this application.

[0024] Figure 12 This is a schematic diagram of the explosion relief port structure of the gravity dewatering and slag discharge explosion relief device in this application.

[0025] Figure label:

[0026] 1. Outer cylinder; 2. Inner cylinder; 3. Air inlet flange connection; 4. Air outlet flange connection; 5. Filter screen; 6. Flushing port; 7. Explosion relief port; 8. Slag collection well; 9. Two valves; 10. Baffle plate; 11. Support; 12. Screwdriver blade; 13. Water guide hole; 14. Magnetic level gauge; 15. Drain outlet; 16. Long hole; 17. Water guide gap; 18. Flange cover; 19. Flange; 20. Shell; 21. Filter screen assembly; 22. Upper shell; 23. Connecting plate; 24. Lower shell; 25. Support plate; 26. Filter screen; 27. Ring belt; 28. Support rib; 29. ​​Air inlet baffle; 30. Slag discharge port. Detailed Implementation

[0027] To address the current limitations of dewatering equipment in online decontamination, this application presents a gravity dewatering slag discharge and explosion relief device. This device makes the slag discharge operation of gravity dewatering equipment more convenient and improves its performance, thereby meeting the greater needs of application development.

[0028] It should be noted that in the description of this application, terms such as "inner", "outer", "upper", and "lower" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] With the increasing stringent national regulations on low-concentration methane emissions, a large number of miniaturized methane power plants will be put into operation, and even single-generator units will become commonplace. Multifunctional and complex equipment will be widely used, hence this invention. This application primarily addresses the technical shortcomings of current gravity dehydrators, such as their difficulty in online decontamination. It aims to make gravity dehydrators more convenient to operate and offer superior performance, thereby meeting the growing needs of application development.

[0031] like Figure 1-3 As shown, a gravity dewatering slag discharge explosion relief device includes an outer cylinder 1, an inner cylinder 2, an air inlet flange pipe 3, an air outlet flange pipe 4, a filter screen 5, a flushing port 6, an explosion relief port 7, a slag collection well 8, two valves 9, and a partition 10. The bottom of the outer cylinder 1 is supported and fixed by a bracket 11. The air inlet flange pipe 3 and the air outlet flange pipe 4 are installed on the side wall of the outer cylinder 1. The top of the outer cylinder 1 is provided with an explosion relief port 7. Next to the explosion relief port 7, the outer cylinder is provided with a flushing port 6. The filter screen 5 is installed below the flushing port inside the outer cylinder 1. The inner cylinder 2 is disposed inside the outer cylinder 1. A support frame is provided in the lower part of the outer cylinder 1. The lower end of the inner cylinder 2 is fixedly mounted on the support frame. Screw blades 12 are installed on the outer wall of the inner cylinder. The top of the inner cylinder 2 is below the filter screen 5. The partition plate 10 is elliptical and fixedly mounted on the upper part of the inner cylinder 2. A water guide hole 13 is provided between the lower end of the partition plate 10 and the outer cylinder 1. The lower end of the outer cylinder 1 is connected to the slag discharge port 30 to the slag collection well 8. A valve 9 is installed at both the upper and lower ends of the slag collection well 8.

[0032] like Figure 1-2 As shown, a magnetic level gauge 14 is installed on the lower side of the outer cylinder 1, and a drain outlet 15 is installed next to the slag collection well at the lower part of the outer cylinder. When the liquid level of the magnetic level gauge 14 reaches the specified value, the liquid under the inner cylinder is discharged through the drain outlet.

[0033] like Figure 1 As shown, a 12mm water-guiding gap 17 is left between the outer edge of the auger blade 12 and the outer cylinder. During operation, water or impurities fall along the gap between the side wall of the outer cylinder and the auger blade into the slag collection well at the bottom of the outer cylinder.

[0034] like Figure 1 As shown, the angle between the partition 10 and the horizontal plane is 15 degrees.

[0035] like Figure 4-6As shown, the filter screen 5 includes a flange cover 18, a flange 19, a housing 20, and a filter assembly 21. The housing 20 is divided into an upper housing 22 and a lower housing 24 with identical structures. The upper housing 22 and the lower housing 24 have a U-shaped structure, and their outer rings are connected by a connecting plate 23, forming a space between the upper housing 22 and the lower housing 24 for placing the filter assembly 21. One end of the housing (i.e., the arc-shaped end of the upper housing 21 and the lower housing) has an assembly hole, and the other end is fixedly connected to the flange 19. The housing 20 is welded and fixedly fitted onto the outer cylinder 1 through the assembly hole. The filter assembly 21 includes a support plate 25, a filter screen 26, a ring band 27, and a support rib 28. One end of the support plate 25 is flat, and the other end is an inwardly concave arc surface. The ring band 27 is fixedly connected to the arc surface end of the support plate 25, and the support rib 28 is fixedly connected inside the ring band 27. The filter screen 26 is installed inside the ring band 27. Two sets of support ribs are welded inside the ring belt. The filter screen is placed inside the two sets of support ribs and welded to the ring belt for fixation. The filter screen assembly 21 is inserted into the outer cylinder 1 through the space between the upper shell 22 and the lower shell 24. The flange cover 18 is bolted to the flange 19, and the flange and flange cover are sealed by a sealing gasket. The shell is fitted onto the outer cylinder through the assembly hole and welded to the outer cylinder for fixation. The filter screen assembly is placed in the space inside the shell. A transverse opening is made at the corresponding position in the outer cylinder. The filter screen assembly is inserted into the outer cylinder and is confined within the shell by the flange and flange cover. Two elongated holes 16 are provided on the support plate facing the flange end. When the filter screen needs to be cleaned or replaced, the flange cover is opened, and a long hook or other tool is inserted into the shell to pull out the filter screen assembly through the elongated holes on the support plate. After replacement or cleaning, the filter screen is reinstalled, and the flange cover is locked for fixation.

[0036] like Figure 12 As shown, the explosion vent 7 is equipped with two flanges, with an explosion vent disc sandwiched between them. The two flanges are sealed together by a gasket. When the pressure inside the outer cylinder exceeds a preset value, the explosion vent disc will rupture instantly due to the enormous stress, releasing the internal medium and protecting other equipment from damage and ensuring underground safety.

[0037] like Figure 9 As shown, the flushing port 6 is equipped with a flange, which is then locked in place by a blind flange. The flange and the blind flange are sealed together by a gasket. When the filter screen needs to be flushed, the flange is opened, and the filter screen can be flushed.

[0038] The gravity dewatering, slag discharge, and explosion relief device of this application has the following advantages:

[0039] 1) The design of the auger blades in the middle of the outer cylinder of this application accelerates the change of gas flow rate and direction, so that liquid water is separated along the outer cylinder wall. The gap between the auger blades and the side wall of the outer cylinder is 12mm. This gap is a special channel for drainage, which is conducive to the separation of water and downward flow to the bottom.

[0040] 2) This application features two valves (worm gear butterfly valves) at the lower end of the outer cylinder, which, together with the slag collection well, form a slag discharge system. This design is specifically for online sewage discharge. By controlling the sequential opening of the worm gear butterfly valves, the system pressure is isolated from the slag collection well, thus achieving pressure-free slag discharge and smooth sewage discharge.

[0041] 3) This application is equipped with a drawer-type filter screen, which is located on the upper part of the outer cylinder and integrates water filtration and dirt filtration.

[0042] 4) This application is equipped with a rinsing port, which reduces cleaning time and downtime, and has the advantages of simple structure, compact and reasonable design, novel concept and unique design.

[0043] 5) This application includes an explosion vent located at the top of the outer cylinder, and an explosion vent plate is installed on the explosion vent. In the prior art, explosion vents are generally designed as a separate tank. This application integrates the explosion vent plate into the equipment of this application, which is economical, practical, energy-saving and consumption-reducing.

[0044] Due to the different densities of gas and water, this application allows liquid water to separate from gas under the action of centrifugal force, centripetal force, and fluid drag. The liquid water flows along the cylinder wall into the slag collection well, and foreign objects such as particles are also separated and enter the slag collection well. Online sewage discharge is completed by opening two valves in sequence.

[0045] Work process:

[0046] Online sewage discharge operation: Under a certain pressure, the gas enters the outer cylinder tangentially from the inlet flange of this device (or an inlet baffle 29 can be welded to the inner cylinder and auger blades at the corresponding inlet flange location within the outer cylinder, allowing the gas to enter the outer cylinder along the side wall). The gas changes direction along the rotation of the auger blades, generating a strong swirling motion, accelerating the gas flow rate. The gas flows downward in the space between the outer and inner cylinders, then enters the inner cylinder from the lower end. The gas rises within the inner cylinder, is filtered by the filter screen, and then discharged from the outlet flange. During this process, liquids and particles flow downward from the water guide gap between the auger blades and the outer cylinder to the slag discharge port at the lower end of the outer cylinder. During normal operation, the valve at the top of the slag collection well is open, allowing a small amount of liquid and foreign matter such as particles to be discharged into the slag collection well. When slag needs to be discharged, the valve at the top of the slag collection well is closed, and then the valve at the bottom is opened to discharge the liquid and foreign matter such as particles. Then the valve at the bottom is closed again to complete the online sewage discharge.

[0047] To rinse, simply open the flange of the rinsing port to rinse the filter screen.

[0048] During explosion venting, when the pressure inside the outer cylinder is too high, the explosion venting disc is ruptured to release the pressure.

[0049] The drawer-type filter can be rinsed using the rinsing port. When cleaning is required, simply open the flange cover and pull out the filter assembly for cleaning.

[0050] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A gravity dewatering and slagging flash tank characterized by: The system includes an outer cylinder, an inner cylinder, an inlet flange connector, an outlet flange connector, a filter screen, a flushing port, an explosion vent, a slag collection well, two valves, and a partition. The bottom of the outer cylinder is supported and fixed by a bracket. The inlet flange connector and the outlet flange connector are installed on the side wall of the outer cylinder. An explosion vent is provided at the top of the outer cylinder. A flushing port is provided on the outer cylinder next to the explosion vent. A filter screen is installed below the flushing port inside the outer cylinder. The inner cylinder is located inside the outer cylinder. A support frame is provided in the lower part of the outer cylinder. The lower end of the inner cylinder is fixedly mounted on the support frame. Screw blades are installed on the outer side wall of the inner cylinder. The top of the inner cylinder is below the filter screen. The partition is elliptical and fixedly installed on the upper part of the inner cylinder. A water guide hole is provided between the lower end of the partition and the outer cylinder. A slag collection well is provided between the lower end of the outer cylinder and the slag discharge port. A valve is installed at each of the upper and lower ends of the slag collection well.

2. A gravity dewatering and slagging flash tank according to claim 1, characterized in that: A 12mm water-guiding gap is left between the outer edge of the auger blade and the outer cylinder.

3. A gravity dewatering and slagging flash tank according to claim 1, characterized in that: The partition makes an angle of 15 degrees with the horizontal plane.

4. A gravity dewatering and slag tapping and explosion venting device according to claim 1, characterized in that: The filter includes a flange cover, a flange, a housing, and a filter assembly. The housing is divided into an upper housing and a lower housing with identical structures. The upper and lower housings are U-shaped and connected by a connecting plate, forming a space between them for placing the filter assembly. One end of the housing has an assembly hole, and the other end is fixedly connected to a flange. The housing is fixedly fitted onto the outer cylinder through the assembly hole. The filter assembly includes a support plate, a filter, a ring band, and a support rib. One end of the support plate is flat, and the other end is an inwardly concave arc surface. The ring band is fixedly connected to one end of the arc surface of the support plate, and the support rib is fixedly connected inside the ring band. The filter is installed inside the ring band. The filter assembly is inserted into the outer cylinder through the space between the upper and lower housings, and the flange cover is bolted to the flange.

5. A gravity dewatering and slag tapping and explosion venting device according to claim 1, characterized in that: The explosion vent is equipped with two flanges, and an explosion vent disc is sandwiched between the two flanges.

6. A gravity dewatering and slag tapping and explosion venting device according to claim 1, characterized in that: The flushing port is fitted with a flange, which is then locked in place by a blind flange.

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