CN219474325U - Gas-liquid separation negative pressure balance suction device - Google Patents
Gas-liquid separation negative pressure balance suction device Download PDFInfo
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- CN219474325U CN219474325U CN202320702963.0U CN202320702963U CN219474325U CN 219474325 U CN219474325 U CN 219474325U CN 202320702963 U CN202320702963 U CN 202320702963U CN 219474325 U CN219474325 U CN 219474325U
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Abstract
The utility model relates to the technical field of gas-liquid separation, in particular to a gas-liquid separation negative pressure balance suction device, which comprises a front separation tank for gas-liquid separation and a negative pressure pump; the top of the front separation tank is provided with a low-temperature gas outlet, the side surface of the front separation tank is provided with a gas inlet for inputting high-temperature gas, and the bottom of the front separation tank is provided with a condensed water outlet formed by heat exchange; the negative pressure pump is communicated with the upper end gas outlet of the front separation tank through a balance pipe, and the balance pipe is also communicated with the condensate water outlet. Through setting up the balance pipe between the gas outlet of leading knockout drum and condensate outlet, balance the atmospheric pressure of two mouthfuls through the balance pipe, then take out condensate of condensate outlet through the suction of negative pressure pump, the normal gas-liquid separation work of leading knockout drum need not be closed in the time of the drainage, has fine practical application value.
Description
Technical Field
The utility model relates to the technical field of gas-liquid separation, in particular to a negative pressure balance suction device for gas-liquid separation.
Background
In a vacuum pumping device of a steam device of a power station air cooling unit (comprising direct air cooling and indirect air cooling), the temperature of the gas which is usually pumped is higher, and a large amount of water vapor is contained, if the temperature of the gas is not reduced, the gas directly transfers heat to sealing water of a vacuum pump, and the temperature of the sealing water is increased; while a large amount of water vapor will also increase the power consumption of the vacuum pump.
The water ring vacuum pump is a positive displacement vacuum pump, and consists of a suction cavity and a discharge cavity, wherein the volumes of the suction cavity and the discharge cavity determine the suction capacity of the vacuum pump.
The sealing water of the vacuum pump mainly plays a role in sealing and transferring energy.
The water or liquid can form certain saturated steam pressure at a certain temperature, a certain air sac is formed in the suction cavity of the vacuum pump to occupy the suction space of the vacuum pump, the vaporization pressure is increased along with the increase of the temperature of the water or liquid, the volume of the formed air sac is increased, the effective suction space of the vacuum pump is reduced, and the vacuum pump pumping force is obviously reduced;
the mixed gas exhausted by the condenser of the power station contains a large amount of water vapor, and according to the American HEI standard, when the design pressure of the condenser is 3.4KPa and the inlet air temperature is 21 ℃, the weight ratio of the non-condensing gas to the water vapor is 1:2.2;
the proportion of non-condensing gas and water vapor in the mixed gas discharged by the condenser is influenced by the temperature of the discharged gas and the design pressure of the condenser, and under different working conditions, the respective contents can be calculated through a formula;
in a direct air cooling unit, the content ratio of dry air to water vapor is generally 1:3.5; in the indirect air cooling unit, the content ratio of dry air to water vapor is as follows: 1:3.0, if the water vapor is not condensed, the pumping quantity of the vacuum pump is increased, and the power consumption of the vacuum pump is increased.
In a direct air cooling unit, the temperature of mixed gas from a condenser is about 75 ℃, the temperature of mixed gas of an indirect air cooling unit is about 70 ℃, the normal sealing water temperature of a vacuum pump is about 20/35 ℃, according to the principle of energy conservation, high-temperature gas and low-temperature liquid are mixed to cause the rise of sealing water temperature, and in general, the sealing water temperature of the vacuum pump is raised by about 3 ℃ when the end difference of air inlet temperature and cooling water temperature is raised by 10 ℃;
in the tail gas recovery in chemical industry, in the catalytic fission process, the exhausted gas is often accompanied with high temperature and a large amount of water vapor, but the water vapor is not allowed to be carried into the next process, if a large amount of water vapor enters the next process, the chemical reaction speed is reduced, and meanwhile, the quality of the product is reduced.
If the high-temperature gas is not cooled, the mixed gas directly transfers heat to the sealing water of the vacuum pump according to the energy conservation theorem, so that the sealing water temperature of the vacuum pump is rapidly increased, the pumping capacity of the vacuum pump is obviously reduced, and simultaneously, the service life of the vacuum pump and the environmental protection are directly influenced along with cavitation and noise.
At present, a common technology is adopted at home and abroad, namely a heat exchanger (plate type or pipe type) is arranged in front of a vacuum pump, because gas exchanges heat through the heat exchanger from bottom to top, the gas after heat exchange is pumped out from the upper end through vacuum suction, and because the upper end has vacuum suction force, condensed water at the lower end is not discharged well.
Disclosure of Invention
The utility model provides a gas-liquid separation negative pressure balance suction device, which solves the technical problems.
The utility model provides a gas-liquid separation negative pressure balance suction device for solving the technical problems, which comprises a front separation tank for gas-liquid separation and a negative pressure pump;
the top of the front separation tank is provided with a low-temperature gas outlet, the side surface of the front separation tank is provided with a gas inlet for inputting high-temperature gas, and the bottom of the front separation tank is provided with a condensed water outlet formed by heat exchange;
the negative pressure pump is communicated with the upper end gas outlet of the front separation tank through a balance pipe, and the balance pipe is also communicated with the condensate water outlet.
Preferably, the condensed water outlet is connected to a negative pressure pump through a drain pipe, and is sucked and discharged by the negative pressure pump.
Preferably, an inlet regulating valve is arranged on the drain pipe.
Preferably, the balance pipe is connected with the drain pipe and then connected to the inlet of the negative pressure pump.
Preferably, a balance pipe adjusting valve is arranged on the balance pipe.
Preferably, the top of the front-mounted separation tank is provided with a gas outlet, the side surface is provided with a gas inlet downwards, the bottom is provided with a condensed water outlet, the side surface is provided with a cooling water inlet downwards, and the other side is provided with a cooling water outlet downwards.
Preferably, the front-end separation tank is internally provided with a tubular heat exchanger in a sealing manner, cooling water flows in from the side edge of the front-end separation tank and is discharged from the other side edge after heat exchange with the tubular heat exchanger, and condensed water formed by heat exchange is discharged from a condensed water discharge port at the bottom of the front-end separation tank.
The beneficial effects are that: the utility model provides a gas-liquid separation negative pressure balance suction device, which comprises a front separation tank for gas-liquid separation and a negative pressure pump; the top of the front separation tank is provided with a low-temperature gas outlet, the side surface of the front separation tank is provided with a gas inlet for inputting high-temperature gas, and the bottom of the front separation tank is provided with a condensed water outlet formed by heat exchange; the negative pressure pump is communicated with the upper end gas outlet of the front separation tank through a balance pipe, and the balance pipe is also communicated with the condensate water outlet. Through setting up the balance pipe between the gas outlet of leading knockout drum and condensate outlet, balance the atmospheric pressure of two mouthfuls through the balance pipe, then take out condensate of condensate outlet through the suction of negative pressure pump, the normal gas-liquid separation work of leading knockout drum need not be closed in the time of the drainage, has fine practical application value.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
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 application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 is a schematic structural diagram of a gas-liquid separation negative pressure balance suction device provided by the utility model.
Reference numerals illustrate:
1 is a gas outlet, 2 is a preposed separating tank, 3 is a heat exchanger tube plate, 4 is a cooling water inlet, 5 is a tube heat exchanger, 6 is a gas inlet, 7 is a cooling water outlet, 8 is a balance tube, 9 is a balance tube regulating valve, 10 is a drain pipe, 11 is an inlet regulating valve, 12 is a negative pressure pump, 13 is a motor, 14 is a negative pressure pump discharge pipeline, and 15 is a discharge pipeline connecting flange.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in figure 1, the utility model provides a gas-liquid separation negative pressure balance suction device, which is limited by space and field and requires small occupied area, and adopts a container type structure, and mainly comprises a front separation tank 2, a tubular heat exchanger 5 and the like. Through the integrated design, the equipment integration degree is further improved, and the area of the equipment is reduced by more than 50% compared with that of the original tubular heat exchanger.
A tube heat exchanger 5 is hermetically arranged in the front-end separation tank 2. When the cooling water enters the front-end separation tank 2 through the cooling water inlet 4, the cooling water enters the heat exchange space, exchanges heat through the tubular heat exchanger 5, and finally flows out from the cooling water outlet 7. The cooling water inlet is arranged at the upper part of one side of the front-end separation tank 2, the cooling water outlet 7 is arranged at the lower part of the other side of the front-end separation tank 2, so that the cooling water can fill the heat exchange space in the whole front-end separation tank 2 as much as possible, and the contact surface between the cooling water and the tubular heat exchanger 5 is realized to the maximum.
In addition, a negative pressure pump 12 is installed at the bottom of the front separation tank 2, the suction distance of the negative pressure pump 12 is only 6-6.5 m, and the vacuum of the unit system is 9-9.5 m, so that the negative pressure pump 12 cannot suck cooling water under normal conditions. According to the cooling water pump, the balance pipe 8 is arranged between the front separation tank 2 and the negative pressure pump 12, so that the inlet pressure of the negative pressure pump 12 is balanced with the front separation tank 2, the negative pressure pump 12 can pump cooling water out of the bottom of the front separation tank 2 by means of the suction stroke of the negative pressure pump 12, namely, the cooling water flows out of the drain pipe 10 at the bottom of the front separation tank 2, and the drain pipe 10 is provided with the inlet regulating valve 11 for controlling the flow rate of the cooling water pumping. The negative pressure pump 12 is driven by the motor 13, and the pumped cooling water finally flows out through the negative pressure pump discharge pipeline 14, and the negative pressure pump discharge pipeline 14 is provided with a discharge pipeline connecting flange 15, so that the better discharged cooling water of the discharge pipeline can be conveniently connected, or the cooling water can be directly recycled and connected to the cooling water inlet 4 to realize self-recycling.
Through setting up the balance pipe between the gas outlet 1 of leading knockout drum 2 and the condensate outlet, balance the atmospheric pressure of two mouthfuls through balance pipe 8, then take the condensate of condensate outlet out through the suction of negative pressure pump again, the normal gas-liquid separation work of leading knockout drum 2 need not be closed in the time of the drainage, has fine practical application value.
Because the cooling water inlet and outlet of the device and the inlet of the negative pressure pump 12 are both provided with manual regulating valves, and the balance pipe 8 is provided with the balance pipe regulating valve 9, when the device does not need to be put into use, the valve can be quickly closed, so that the device is changed into a suction pipe section without affecting the operation of the original equipment.
In one specific implementation scenario:
referring to fig. 1, it is shown that: the negative pressure balanced suction device for gas-liquid separation mainly comprises: the device comprises a preposed gas-liquid separation tank 2, a tubular heat exchanger 5, a negative pressure pump 12, a negative pressure pump matched motor 13 and the like.
When the high-temperature mixed gas (composed of water vapor, non-condensed gas and the like) enters the front-end separation tank from the gas inlet 6;
the tubular heat exchanger 5 is composed of an upper heat exchanger tube plate 3, a lower heat exchanger tube plate 3, a plurality of heat exchanger tube bundles 31, a shell and the like, and the shell of the heat exchanger is a cylinder body of the front separation tank 2, namely the upper heat exchanger tube plate 3 and the lower heat exchanger tube plate 3 are welded with the inner wall of the front separation tank 2 together, so that the tubular heat exchanger 5 is hidden in the front separation tank 2, and the sealing effect is achieved.
The drain pipe 10 arranged at the bottom of the front separation tank 2 enters the negative pressure pump 12, and the suction distance of the negative pressure pump 12 is only 6-6.5 m water column, while the negative pressure of the vacuumizing device is 9-9.5 m water column, so that the negative pressure pump 12 cannot pump water, but the water in the negative pressure pump 12 is pumped into the vacuumizing device due to the negative pressure of the vacuumizing device.
At this time, a balance pipe 8 is installed at the upper part of the suction inlet of the negative pressure pump 12 and the front separation tank 2, so that the pressure balance between the inlet pressure of the negative pressure pump 12 and the inlet of the vacuumizing device is realized, and the negative pressure pump 12 can pump out the cooling water and the water rapidly condensed in the mixed gas by means of the suction stroke of the negative pressure pump.
The negative pressure pump 12 is selected for the high vacuum condensing gas device because the impeller of the negative pressure pump 12 is always immersed in the liquid, the air inlet and the air outlet are separated by the partition plate, the negative pressure pump can realize idle running under the action of centrifugal force, and the negative pressure pump can only discharge the liquid and can not form vacuum in the suction cavity.
The beneficial effects are that: the utility model discloses a gas-liquid separation negative pressure balance suction device, wherein high-vacuum mixed gas enters through an air inlet 6, passes through a front separation tank 2 and a tubular heat exchanger 5, and enters into a vacuum device through a connection port 1;
in the suction process, through the water spraying holes formed in the tube bundle of the heat exchanger 3, cooling water is fully contacted with the mixed gas to transfer heat, so that the temperature of the mixed gas is reduced, and meanwhile, water vapor in the mixed gas is quickly condensed into water, thereby achieving the purposes of reducing the air inlet temperature and improving the vacuumizing device;
a balancing pipe is arranged between the front-end separator tank 2 and the negative pressure pump 12, which serves for pressure balancing, wherein a regulating valve in the balancing pipe serves for regulating the gas flow.
The cooling water in the front-end separation tank and the rapid condensation water in the mixed gas are pumped out by the negative pressure pump 12, so that the purposes of reducing the air inlet temperature and improving the output of the vacuumizing pump device are achieved.
In order to facilitate the field installation and the transformation of the old equipment, all the equipment is especially installed together in a concentrated way, thereby achieving the purposes of reducing the occupied area and facilitating the installation.
The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model may be implemented as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.
Claims (7)
1. The negative pressure balanced suction device for gas-liquid separation is characterized by comprising a front separation tank for gas-liquid separation and a negative pressure pump;
the top of the front separation tank is provided with a low-temperature gas outlet, the side surface of the front separation tank is provided with a gas inlet for inputting high-temperature gas, and the bottom of the front separation tank is provided with a condensed water outlet formed by heat exchange;
the negative pressure pump is communicated with the upper end gas outlet of the front separation tank through a balance pipe, and the balance pipe is also communicated with the condensate water outlet.
2. The gas-liquid separation negative pressure balance suction device according to claim 1, wherein the condensed water discharge port is connected to a negative pressure pump through a drain pipe, and is sucked and discharged by the negative pressure pump.
3. The gas-liquid separation negative pressure balance suction device according to claim 2, wherein an inlet regulating valve is provided on the drain pipe.
4. The gas-liquid separation negative pressure balance suction device according to claim 2, wherein the balance pipe is connected with the drain pipe and connected to the inlet of the negative pressure pump.
5. The gas-liquid separation negative pressure balance suction device according to claim 1, wherein a balance pipe adjusting valve is arranged on the balance pipe.
6. The negative pressure balanced suction apparatus for gas-liquid separation according to claim 1, wherein the top of the front-mounted separation tank is provided with a gas outlet, the side surface is provided with a gas inlet downwards, the bottom is provided with a condensed water outlet, the side surface is provided with a cooling water inlet upwards, and the other side is provided with a cooling water outlet downwards.
7. The negative pressure balanced suction apparatus for gas-liquid separation according to claim 6, wherein the front-end separation tank is internally provided with a tube heat exchanger in a sealing manner, cooling water flows in from the side of the front-end separation tank and is discharged from the other side after heat exchange with the tube heat exchanger, and condensed water formed by the heat exchange is discharged from a condensed water discharge port at the bottom of the front-end separation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320702963.0U CN219474325U (en) | 2023-04-03 | 2023-04-03 | Gas-liquid separation negative pressure balance suction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320702963.0U CN219474325U (en) | 2023-04-03 | 2023-04-03 | Gas-liquid separation negative pressure balance suction device |
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| Publication Number | Publication Date |
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| CN219474325U true CN219474325U (en) | 2023-08-04 |
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| CN202320702963.0U Active CN219474325U (en) | 2023-04-03 | 2023-04-03 | Gas-liquid separation negative pressure balance suction device |
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- 2023-04-03 CN CN202320702963.0U patent/CN219474325U/en active Active
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