CN211648603U

CN211648603U - Gram negative pump and gas-liquid separation device

Info

Publication number: CN211648603U
Application number: CN201921901703.6U
Authority: CN
Inventors: 李月仙
Original assignee: Zhenxin Turbine Machinery Co ltd
Current assignee: Zhenxin Turbine Machinery Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-10-09
Anticipated expiration: 2029-11-06

Abstract

The utility model provides a gram negative pump and gas-liquid separation device relates to a gas-liquid separation technique. The liquid level control device solves the problems that in the prior art, liquid level changes greatly and a pump is always started and stopped frequently. This gram negative pump, including pump chamber, pump inlet, pump export, pump inlet top intercommunication has balanced gas pipeline, and balanced gas pipeline is used for intercommunication pump chamber and gas-liquid separation device, gram negative pump be connected with the outlet flange of gas-liquid separation tank bottom through pump inlet flange, be equipped with balanced gas interface on the gram negative pump, be equipped with balanced flange on the gas-liquid separation tank, be connected balanced gas pipeline between balanced gas interface and the balanced flange. The gram negative pump is novel in design and reasonable in conception, the gas in the pump cavity is communicated with the separation tank, the pressure is effectively balanced, the volute and the pump cavity are filled with liquid, the liquid can be smoothly pumped out of the volute by the impeller through the volute backflow design, and the semi-open type long-flow-channel cylindrical blade is strong in cavitation resistance and accords with the characteristic of low specific rotating speed of the gram negative pump.

Description

Gram negative pump and gas-liquid separation device

Technical Field

The utility model belongs to the technical field of gas-liquid separation, concretely relates to gram burden pump and gas-liquid separation device that vacuum system used.

Background

When the gram negative pump is applied to a papermaking process, liquid needs to be fully separated from the gas-liquid mixture by the vacuum pump, particularly the turbine vacuum pump, gas is pumped away by the turbine vacuum pump, water is pumped away by the gram negative pump at the bottom of the gas-liquid separation device, and white water discharged by the gram negative pump can be recycled.

The gram negative pump of prior art, liquid level change is great in separator working process, and the pump frequently opens and stops always, and the belt pulley is fragile, and the belt is changed frequently, and the maintenance cost is higher, and life is shorter.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gram burden pump and gas-liquid separation to overcome the problem that exists among the prior art, avoid gram to burden the frequent opening of pump and stop.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a gram negative pump, includes pump chamber, pump inlet, pump export, pump inlet top intercommunication has the balanced gas pipeline, and the balanced gas pipeline is used for communicateing pump chamber and gas-liquid separation device.

In some embodiments, the pump inlet of the gram negative pump is in vertical communication with the volute inlet of the gram negative pump.

In some embodiments, the impeller is a semi-open, long flow path cylindrical blade.

In some embodiments, a valve is disposed in the balance gas pipe.

The gas-liquid separation device using the gram negative pump comprises a gas-liquid separation tank (1), a balance gas pipeline (2) and a gram negative pump (3) which are connected and matched, and is characterized in that a pump inlet of the gram negative pump (3) is communicated with a water outlet of the gas-liquid separation tank (1), and the balance gas pipeline (2) is communicated with the upper part of the liquid level of the gas-liquid separation tank (1).

In some embodiments, the pump chamber is below a drain of the gas-liquid separation tank (1).

In some embodiments, the gram negative pump is connected with a water outlet flange at the bottom of the gas-liquid separation tank through a pump inlet flange, a balance gas interface is arranged on the gram negative pump, a balance flange is arranged on the gas-liquid separation tank, and a balance gas pipeline is connected between the balance gas interface and the balance flange.

In some embodiments, the gram negative pump is a vertical structure, the motor is positioned at the top of the gram negative pump, and the impeller and the pump outlet are both lower than the lowest point of the wall of the pump inlet flange pipe.

In some embodiments, the balance gas port is higher than the highest point of the wall of the pump inlet flange.

Compared with the prior art, the subject name has the following advantages:

the gram negative pump and the gas-liquid separation device are novel in design and reasonable in conception, the gas in the pump cavity is communicated with the separation tank, the pressure is effectively balanced, the volute and the pump cavity are filled with liquid and can be smoothly pumped out of the volute by the impeller through the volute backflow design, and the semi-open type and long-flow-passage cylindrical blades are high in cavitation resistance, accord with the characteristic of low specific rotation speed of the gram negative pump, can convert mechanical energy into kinetic energy and potential energy of the liquid to the maximum extent, and can better adapt to the service environment of frequent start and stop.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

It will be understood by those of ordinary skill in the art that all directional references (e.g., above, below, upward, downward, top, bottom, left, right, vertical, horizontal, etc.) are illustratively used in the figures to aid the reader's understanding and do not imply (e.g., position, orientation, or use, etc.) a limitation on the scope of the invention, which is defined by the claims appended hereto. Additionally, the term "substantially" may refer to slight imprecision or deviation in conditions, amounts, values, or dimensions, etc., some of which may be within manufacturing or tolerance limits.

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

fig. 2 is a schematic structural view of the impeller.

In the figure, a 1-gas-liquid separation tank, a 1 a-tank inlet, a 1 b-tank outlet, a 1 c-water outlet flange, a 1 d-balance flange, a 2-balance gas pipeline, a 3-gram negative pump, a 3 a-pump inlet flange, a 3 b-balance gas interface, a 3 c-impeller and a 3 d-pump outlet.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The following embodiments do not limit the invention to which the claims refer. Moreover, all combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

Example one

As shown in fig. 1 and 2, the gram negative pump applied to the gas-liquid separation tank comprises a gas-liquid separation tank 1, a balance gas pipeline 2 and a gram negative pump 3 which are connected and matched with each other, and is characterized in that the gram negative pump 3 is connected with a water outlet flange 1c at the bottom of the gas-liquid separation tank 1 through a pump inlet flange 3a, a balance gas connector 3b is arranged on the gram negative pump 3, a balance flange 1d is arranged on the gas-liquid separation tank 1, and the balance gas pipeline 2 is connected and arranged between the balance gas connector 3b and the balance flange 1 d. In the papermaking process, gas-liquid mixture from vacuum points such as a wet part is separated from liquid by a spiral separation device in a gas-liquid separation tank 1, the gas is pumped by a vacuum pump, the liquid is discharged by a gram negative pump, and the discharged liquid can be recycled.

In the above embodiment, the gram negative pump 3 is of a vertical structure, the motor is positioned at the top of the gram negative pump 3, and the occupied area of the pump is much smaller than that of a horizontal pump. The impeller 3c and the pump outlet 3d are both lower than the lowest point of the pipe wall of the pump inlet flange 3a, when the vacuum system works, liquid separated from the gas-liquid separation tank 1 flows back to the gram negative pump 3 from the bottom, and the volute and the pump cavity of the gram negative pump 3 are filled with liquid and smoothly conveyed out of the pump by the impeller 3 c. In the above embodiment, the impeller 3c is a semi-open type long-flow-channel cylindrical blade, and compared with an ordinary centrifugal pump impeller, the impeller has more excellent cavitation resistance, meets the use requirements of a vacuum system, and simultaneously conforms to the low specific speed characteristic of the gram negative pump 3, can convert mechanical energy into liquid kinetic energy and potential energy to the maximum extent, and can better adapt to the use environment that the gram negative pump 3 is frequently started and stopped due to the liquid level change at the bottom of the gas-liquid separation tank 1.

In the above embodiment, the gram negative pump 3 is provided with the balance gas interface 3b, the balance gas interface 3b is higher than the highest point of the pipe wall of the pump inlet flange 3a, a balance hole is formed in the pump suction cavity and is communicated with the gas-liquid separation tank 1 through a pipeline, the balance gas interface 3b is positioned between the pump inlet flange 3a and the shaft seal, when the vacuum system works, vacuum is formed in the gas-liquid separation tank 1, as the substances separated from the gas-liquid separation tank 1 cannot reach 100% of liquid, a small amount of gas exists in the pump cavity, and the gas moves to the balance gas pipeline 2 and is discharged from the gas-liquid separation tank 1, the gas binding phenomenon is automatically prevented, the design can ensure that the gram negative pump 3 can be normally started and normally run under the conditions of no water filling and any liquid level, good suction performance is realized, the consumption of drainage power of the vacuum pump is saved, and the service life of the vacuum pump is, reduce environmental pollution, select this patent product to satisfy the requirement that water and gas were got rid of respectively. In the above embodiment, the valve is arranged in the balance gas pipeline 2, and the valve can be closed under the working condition that the gram negative pump 3 can run for a long time after being started, so that the convenience condition can be provided for equipment maintenance.

Although some terms are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention. The order of execution of the operations, steps, and the like in the apparatuses and methods shown in the specification and drawings may be implemented in any order as long as the output of the preceding process is not used in the subsequent process, unless otherwise specified. The descriptions using "first", "next", etc. for convenience of description do not imply that they must be performed in this order.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a gram negative pump, includes pump chamber, pump inlet, pump export, its characterized in that, pump inlet top intercommunication has balanced gas pipeline (2), and balanced gas pipeline is used for communicateing pump chamber and gas-liquid separation device.

2. The gram negative pump of claim 1, wherein the pump inlet of the gram negative pump is in vertical communication with the volute inlet of the gram negative pump.

3. Gram negative pump according to claim 1, characterized in that the impeller (3 c) of the gram negative pump is a semi-open, long flow path cylindrical vane.

4. Gram negative pump according to claim 1, characterized in that the balance gas duct (2) is provided with a valve.

5. A gas-liquid separation device applying the gram negative pump as claimed in claim 1, 2, 3 or 4, which comprises a gas-liquid separation tank (1), a balance gas pipeline (2) and the gram negative pump (3) which are connected and matched, wherein the pump inlet of the gram negative pump (3) is communicated with the water outlet of the gas-liquid separation tank (1), and the balance gas pipeline (2) is communicated with the upper part of the liquid surface of the gas-liquid separation tank (1).

6. The gas-liquid separation device according to claim 5, wherein the pump chamber is lower than a drain port of the gas-liquid separation tank (1).

7. The gas-liquid separation device according to claim 5, wherein the gram negative pump (3) is connected with a drain port flange (1 c) at the bottom of the gas-liquid separation tank (1) through a pump inlet flange (3 a), the gram negative pump (3) is provided with a balance gas interface (3 b), the gas-liquid separation tank (1) is provided with a balance flange (1 d), and a balance gas pipeline (2) is connected between the balance gas interface (3 b) and the balance flange (1 d).

8. The gas-liquid separation device of claim 5, wherein the gram negative pump (3) is of a vertical structure, the motor is positioned at the top of the gram negative pump (3), and the impeller (3 c) and the pump outlet (3 d) are both lower than the lowest point of the pipe wall of the pump inlet flange (3 a).

9. Gas-liquid separation device according to claim 7, characterized in that the balance gas port (3 b) is higher than the highest point of the pipe wall of the pump inlet flange (3 a).