CN216045621U - Same-diameter arc-shaped water seal tank - Google Patents

Abstract

The utility model relates to the technical field of pipeline cutting, in particular to a same-diameter arc-shaped water seal tank which comprises a vertically arranged air inlet pipe, a first elbow, a second elbow, an inclined pipe and a horizontally arranged air outlet pipe. The arrangement of the bending degree and the curvature radius of the first elbow and the second elbow ensures that no obvious large-scale deflection exists on the whole, so that the pressure drop can be well reduced when the pressure-reducing type elbow is used; the whole structure is compact, the gas is in downstream flow when flowing normally, the local resistance coefficient is extremely small, the device is suitable for newly-built devices and modified devices, and the pressure drop is not more than 100 Pa.

Description

Same-diameter arc-shaped water seal tank

Technical Field

The utility model relates to the technical field of pipeline cutting, in particular to a same-diameter arc-shaped water seal tank.

Background

At present, when high-temperature low-pressure gas-phase medium in petrochemical industry is conveyed in a large flow and large flow channel (the diameter of a pipeline is more than 2 m), a flow interception technology is adopted, and a pipeline cutting technical method is generally adopted:

1. large shut-off valves. However, the large stop valve has the technical problems of difficult design and manufacture, difficult high-temperature deformation and jamming operation and the like, and related products do not exist in China and need to be imported, so that the price is high;

2. a large-scale regulating butterfly valve. The large-diameter butterfly valve has the problems of high price, poor sealing, easy deformation and leakage under heating and the like, so the large-diameter butterfly valve is only applied to occasions allowing a small amount of gas-phase medium to leak or under the condition of emergency accident cutting treatment; if the sealing requirement is strict, other sealed cutting measures are required to be supplemented;

3. traditional water-sealed tanks. The water-sealed tank is a common cutting method in industrial application at present, and has the advantages of easy manufacture, low cost, good sealing, no leakage and the like, but the traditional water-sealed tank needs to arrange the large-diameter low-pressure gas-phase pipeline in a 90-degree cross way, and leads the gas-phase medium to carry out the processes of flaring deceleration, dilatation, nearly 180-degree turning, necking acceleration and the like when the gas-phase medium is normally conveyed through the water-sealed tank, so that the pressure loss of the gas-phase medium is relatively high when the gas-phase medium normally passes through the water-sealed tank (at present, the pressure drop can be reduced to about 500Pa through structural optimization), and the energy consumption of the conveying power of the gas-phase medium is increased.

The cutting off of high temperature flue gas in the energy recovery system of a catalytic cracking device in the petrochemical industry requires that the leakage rate of a medium after the flue gas is cut off is zero, and meanwhile, the pressure drop requirement is small, so that the development of a novel ultra-low pressure drop water-sealed tank has practical significance.

After coming out of the regenerator, the catalytic cracking flue gas enters a smoke machine to drive a main fan to do work, and then enters a waste heat boiler system to release heat and produce steam. The water-sealed tank is generally arranged on an inlet of the residual boiler and a bypass flue, is a leakproof valve, is generally used in low-pressure and large-flow gas places, and achieves the cutting-off effect by separating a flue gas channel through a pressure head generated by a water column. The flue gas water-sealed tanks generally appear in pairs and are arranged on two parallel flues, and can play a role in switching the flues. The bypass water-sealed tank is a channel for cutting off the smoke gas to the chimney when the residual boiler is put into use, the smoke gas can break through the water seal to release pressure when the pressure of the flue gas rises suddenly, the surge of the main fan caused by the overpressure of the regenerator is prevented, and the effect of a safety valve is achieved at the moment.

The working principle of the catalytic cracking water-sealed tank is as follows: the flue gas enters the water seal tank through the flue, flows through the outlet after being folded and reversed, flows out, the water seal tank cuts off the flue gas and mainly depends on the static pressure of water, when the flue gas needs to be cut off, circulating water enters from the lower part, along with the rising of the liquid level, when the pressure difference generated by the liquid level difference is larger than the pressure of the flue gas, the flue gas is cut off. No matter how the structure of the catalytic cracking water seal tank is improved, the catalytic cracking water seal tank is basically a U-shaped pipe or a deformed structure thereof, the fundamental principle is consistent, and only pressure drop caused by different structural forms is different.

For example, 200920296907.1 is the most common U-shaped water-sealed tank, and has simple structure, but the inlet gas and the outlet gas pass through 4 90-degree bends, which is not favorable for the flow of gas phase material flow, and the pressure drop is relatively large. 200920298278.6 discloses a streamline water-sealed tank, which reduces pressure drop through streamline improvement of a pipeline, but still has more sudden changes, the pressure drop is not greatly reduced, and the progress is smaller compared with the common U-shaped water-sealed tank. 201720396478.X is improved in form, but still belongs to a deformed structure of a U-shaped pipe, and has little effect on reducing pressure drop. The structure is simple, particularly the traditional U-shaped structure has larger flow resistance, and the flow resistance is actually improved into various inner and outer cylinders or other baffling types without further optimization and adjustment on the basis. 201020668603.6 provides a water-sealed tank with a diversion cone at the bottom, which reduces the pressure drop generally not to exceed 50 Pa; 201420285113.6 provides a low pressure drop sealed tank, which mainly adjusts the shape and flow direction on the inner and outer cylinder structure, reduces the pressure drop not to exceed 100 Pa; 201621289676.8 proposes the use of an inlet baffle and an outlet conical junction to reduce the pressure drop, but the pressure drop reduction is generally no more than 100 Pa; 201621290443.X proposes to reduce pressure drop by using an inlet flow guide hole and an outlet tapered connecting section, but the pressure drop is generally not more than 100 Pa; 201720396478.X and 201521022707.9 propose to adopt a box-type structure, and a baffle plate is arranged in the middle of the box-type structure, which is also a deformation of a U-shaped pipe structure, so that the baffle is expanded and reduced back and forth, and the pressure drop is not small; 201210321101.X and 201710186139.3 propose to adopt and repack the formula, increase the moving part, it is unreliable in the actual operation; 201510069185.6 adopts two-stage water seal, 201510372387.8 adopts multi-path combination, has complex structure, does not accord with the idea of reducing pressure drop by hydromechanics, and is difficult to apply; 201420229866.5, 201520604765.6, 201520606982.9 and 201720525896.4 all adopt various flow guide structures, and the flow channels are optimized by arranging pipelines, so that great breakthrough is not caused in the aspect of reducing pressure drop.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provide the same-diameter arc-shaped water-sealed tank.

The utility model realizes the purpose through the following technical scheme:

a same-diameter arc-shaped water seal tank comprises a vertically arranged air inlet pipe, a first elbow, a second elbow, an inclined pipe and a horizontally arranged air outlet pipe, wherein the lower end of the air inlet pipe is communicated with the first elbow, the outer end of the first elbow is communicated with the inclined pipe, the outer end of the inclined pipe is communicated with the second elbow which extends outwards, the outer end of the second elbow is communicated with the air outlet pipe, the lowest point of the air outlet pipe is higher than the highest point of the first elbow, the bottom of the first elbow is communicated with a water inlet and outlet pipe, and the outer end of the inclined pipe and a position corresponding to the lower part of the air outlet pipe are provided with an overflow pipe;

the bending angle of the first elbow is 110-170 degrees, and the curvature radius of the first elbow is not less than 1400 mm; the curvature radius of the second elbow is not less than 1400 mm;

preferably, the bend angle of the first elbow is 130 degrees and 140 degrees.

Preferably, the curvature radius of the first elbow is 1900-.

Preferably, the central axes of the inlet and outlet pipes are coplanar.

Preferably, the first bend and the second bend have the same radius of curvature.

Preferably, the elbow is a standard round elbow or shrimp joint elbow.

Has the advantages that:

1. the arrangement of the bending degree and the curvature radius of the first elbow and the second elbow ensures that no obvious large-scale deflection exists on the whole, so that the pressure drop can be well reduced when the pressure-reducing valve is used;

2. the whole structure is compact, the gas is in downstream flow when flowing normally, the local resistance coefficient is extremely small, the device is suitable for newly-built devices and modified devices, and the pressure drop is not more than 100 Pa.

Additional features of the utility model and advantages thereof will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention.

The reference numerals are explained below:

1. an air inlet pipe; 2. a first elbow; 3. an inclined tube; 4. a second elbow; 5. an air outlet pipe; 6. a water inlet pipe and a water outlet pipe; 7. and (4) an overflow pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In a first embodiment, as shown in fig. 1 and 2, a same-diameter arc-shaped water seal tank includes a vertically arranged air inlet pipe 1, a first elbow 2, a second elbow 4, an inclined pipe 3 arranged obliquely, and an air outlet pipe 5 arranged horizontally, wherein the lower end of the air inlet pipe 1 is communicated with the first elbow 2, the outer end of the first elbow 2 is communicated with the inclined pipe 3, the outer end of the inclined pipe 3 is communicated with the second elbow 4 extending outward, the outer end of the second elbow 4 is communicated with the air outlet pipe 5, the lowest point of the air outlet pipe 5 is higher than the highest point of the first elbow 2, the bottom of the first elbow 2 is communicated with a water inlet and outlet pipe 6, the outer end of the inclined pipe 3 is provided with an overflow pipe 7 corresponding to the position below the air outlet pipe 5, and the water inlet and outlet pipe 6 and the overflow pipe 7 adopt the structure in the prior art, which is not described in detail;

the bending angle of the first elbow 2 is 110-; the curvature radius of the second elbow 4 is not less than 1400 mm;

the elbow is a standard round elbow or a shrimp joint elbow, and a conventional non-standard elbow can also be adopted;

the arrangement of the baffle plate ensures that no baffling with obvious large scale exists on the whole through limiting the bending degree and the curvature radius of the first elbow 2 and the second elbow 4, so that the pressure drop can be well reduced when the baffle plate is used; the structure is compact, the gas is in downstream flow when flowing normally, the local resistance coefficient is extremely small, the device is suitable for newly-built devices and modified devices, and the pressure drop is not more than 100 Pa.

In the second embodiment, on the basis of the first embodiment, as shown in fig. 1 and fig. 2, the bend angle of the first bend 2 is 130 degrees and 140 degrees, so that the overall volume is reduced as much as possible under the condition that no baffling with a large scale is obvious.

Third embodiment, on the basis of the first embodiment, as shown in fig. 1 and 2, the curvature radius of the first elbow 2 is 1900-.

Fourth embodiment, on the basis of the first embodiment, as shown in fig. 1 and 2, the central axes of the inlet pipe 1 and the outlet pipe 5 are coplanar, so that the overall production is more convenient.

Fifth embodiment, on the basis of the third embodiment, as shown in fig. 1 and 2, the first bend 2 and the second bend 4 have the same radius of curvature, so that the arrangement can further reduce the pressure drop in use.

During optimal combination, the inner diameter of the pipeline is 1200mm, the bend angle of the first elbow 2 is a standard round elbow with 135 degrees, the bend angle of the second elbow 4 is a standard round elbow with 45 degrees, and the curvature radius of the first elbow 2 and the curvature radius of the second elbow 4 are 2000mm, so that the whole structure is moderate, and the gas phase pressure drop in the pipeline can be stably controlled to be about 90 Pa.

In the above-mentioned structure, during the use, the traditional control system of cooperation when needs seal, opens business turn over water pipe 6, and water carries out the water seal through business turn over water pipe 6 entering into first elbow 2 inside, when the inside water of pipeline is too much, and water is discharged from overflow pipe 7, prevents that water from entering into outlet duct 5, when needs intercommunication pipeline, to the inside water of elbow 2 from business turn over water pipe 6 in discharge can.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a with footpath arc water sealed tank which characterized in that: the air inlet pipe comprises an air inlet pipe (1), a first elbow (2), a second elbow (4), an inclined pipe (3) and an air outlet pipe (5), wherein the air inlet pipe is vertically arranged, the inclined pipe (3) is obliquely arranged, the air outlet pipe (5) is horizontally arranged, the lower end of the air inlet pipe (1) is communicated with the first elbow (2), the outer end of the first elbow (2) is communicated with the inclined pipe (3), the outer end of the inclined pipe (3) is communicated with the second elbow (4) which extends outwards, the outer end of the second elbow (4) is communicated with the air outlet pipe (5), the lowest point of the air outlet pipe (5) is higher than the highest point of the first elbow (2), the bottom of the first elbow (2) is communicated with a water inlet and outlet pipe (6), and an overflow pipe (7) is arranged at the outer end of the inclined pipe (3) and corresponds to the position below the air outlet pipe (5);

the bending angle of the first elbow (2) is 110-170 degrees, and the curvature radius of the first elbow (2) is not less than 1400 mm; the curvature radius of the second elbow (4) is not less than 1400 mm.

2. The same-diameter arc-shaped water-sealed tank as defined in claim 1, wherein: the bending angle of the first elbow (2) is 130 degrees and 140 degrees.

3. The same-diameter arc-shaped water-sealed tank as defined in claim 1, wherein: the curvature radius of the first elbow (2) is 1900-.

4. The same-diameter arc-shaped water-sealed tank as defined in claim 1, wherein: the central axes of the air inlet pipe (1) and the air outlet pipe (5) are coplanar.

5. The same-diameter arc-shaped water-sealed tank as defined in claim 1, wherein: the curvature radius of the first elbow (2) is the same as that of the second elbow (4).

6. The same-diameter arc-shaped water-sealed tank as defined in claim 1, wherein: the elbow is a standard round elbow or a shrimp joint elbow.

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