CN212673873U

CN212673873U - Environment-friendly vacuum device for condensing non-condensable gas

Info

Publication number: CN212673873U
Application number: CN202020826510.5U
Authority: CN
Inventors: 邱学强; 叶剑锋; 刘佳; 郭峰
Original assignee: Shaanxi Future Clean Chemicals Co ltd
Current assignee: Shaanxi Future Clean Chemicals Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-03-09
Anticipated expiration: 2030-05-18

Abstract

The utility model relates to an environmental protection vacuum apparatus of condensation noncondensable gas, include: a roots pump; the heat exchanger is connected with the rear part of the Roots pump, and the water temperature of the heat exchanger is controlled to be 8-10 ℃; the heat exchanger is sequentially connected with the liquid phase collecting tank and the liquid phase discharging tank through pipelines; a pressure communicating valve and a collecting tank drain valve are connected in parallel between the liquid phase collecting tank and the liquid phase drain tank, and the rear part of the liquid phase drain tank is connected with a drain valve of the drain tank; and the gas outlet pipeline of the liquid phase liquid discharge tank is communicated with the vacuum backing pump, and the gas outlet of the vacuum backing pump is communicated with the atmosphere. Through the control of the temperature of the condensed water, the non-condensable gas can be condensed into liquid to be reserved, and the blockage caused by the condensation of the non-condensable gas into solid due to supercooling can be controlled; the gas emission reaches the emission standard. Liquid drainage without shutdown is realized through the arrangement of each valve; the non-condensable gas is reduced from entering vacuum seal oil of the vacuum backing pump, the abrasion of the pump is reduced, the service life is prolonged, and the oil change frequency of the vacuum seal oil is reduced.

Description

Environment-friendly vacuum device for condensing non-condensable gas

Technical Field

The utility model relates to an environmental protection vacuum apparatus technical field, more specifically the environmental protection vacuum apparatus who relates to a condensation noncondensable gas that says so.

Background

In chemical production, most materials have higher boiling points, the separation process is carried out under the vacuum condition so as to reduce the vaporization temperature of the materials and achieve the purposes of energy conservation, consumption reduction and convenient operation, and the vacuum device is more commonly used. The existing vacuum device is characterized in that non-condensable gas is generally condensed into a liquid phase naturally and is collected through a pipeline and discharged outwards, but the temperature of equipment is high in the operation process of a vacuum pump, and part of the non-condensable gas reaches a condensation point, so that the non-condensable gas enters a vacuum backing pump (an oil ring vacuum pump) to pollute vacuum sealing oil, the viscosity of the vacuum sealing oil is reduced and the vacuum sealing oil is deteriorated, the vacuum backing pump is abraded, the service life is prolonged, and the non-condensable gas is directly discharged into the atmosphere along with a vacuum exhaust pipeline after passing through the vacuum backing pump to cause environmental pollution.

Therefore, how to provide an environmentally friendly vacuum device for condensing non-condensable gas is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to provide an environmental protection vacuum apparatus of non-condensable gas of condensation solves the not thorough problem of non-condensable gas cooling of current vacuum pump.

The utility model provides an environmental protection vacuum apparatus of condensation noncondensable gas, include:

a roots pump;

the heat exchanger is connected with the rear part of the Roots pump, and the water temperature of the heat exchanger is controlled to be 8-10 ℃;

the heat exchanger is sequentially connected with the liquid phase collecting tank and the liquid phase discharging tank through pipelines; a pressure communicating valve and a collecting tank drain valve are connected in parallel between the liquid phase collecting tank and the liquid phase drain tank, and the rear part of the liquid phase drain tank is connected with a drain valve of the drain tank;

and the gas outlet pipeline of the liquid phase liquid discharge tank is communicated with the vacuum backing pump, and the gas outlet of the vacuum backing pump is communicated with the atmosphere.

Can know via foretell technical scheme, compare with prior art, the utility model discloses an environmental protection vacuum apparatus of non-condensable gas of condensation at first, uses the heat exchanger further condensation of non-condensable gas, makes gaseous emission reach emission standard. Secondly, through the control of the temperature of the condensed water, the non-condensable gas can be condensed into liquid for reservation, and the blockage caused by the condensation of the non-condensable gas into solid due to supercooling can be controlled; thirdly, liquid drainage without shutdown is realized through the arrangement of each valve, and the problem of excessive non-condensable gas is not worried about; finally, the non-condensable gas is prevented from entering vacuum seal oil of the vacuum backing pump, the abrasion of the pump is reduced, the service life is prolonged, the oil change frequency of the vacuum seal oil is reduced, and the production cost is reduced.

Furthermore, the heat exchanger is controlled by return water temperature, and a temperature regulating valve and a thermometer are arranged on a return water pipe of the heat exchanger; the temperature regulating valve adopts a self-operated temperature control valve. Wherein self-operated temperature-sensing valve: the liquid is heated to expand and the liquid is incompressible to realize automatic adjustment. The liquid expansion within the temperature sensor is uniform, with the control acting as a proportional adjustment. When the temperature of the controlled medium changes, the volume of the temperature sensing liquid in the sensor expands or contracts along with the change of the temperature of the controlled medium. When the temperature of the controlled medium is higher than a set value, the temperature sensing liquid expands to push the valve core to close the valve downwards, so that the flow of the heating medium is reduced; when the temperature of the controlled medium is lower than a set value, the temperature sensing liquid contracts, the return spring pushes the valve core to open, and the flow of the heating medium is increased. The temperature regulating valve can also adopt a Siemens temperature control valve.

Furthermore, the front part of the roots pump is connected with a multi-stage roots pump in series, so that the requirement of better vacuum degree can be met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an environmentally friendly vacuum apparatus for condensing non-condensable gas according to the present invention;

in the figure: 100-roots pump, 200-heat exchanger, 300-liquid phase collection tank, 400-liquid phase drain tank, 500-vacuum backing pump, 600-pressure communicating valve, 700-collection tank drain valve, 800-drain tank drain valve, 900-temperature regulating valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present invention provides an environment-friendly vacuum device for condensing non-condensable gas, comprising:

a roots pump 100;

the heat exchanger 200 is connected with the rear part of the Roots pump 100, and the water temperature of the heat exchanger 200 is controlled to be 8-10 ℃;

the liquid phase collecting tank 300 and the heat exchanger 200 are sequentially connected with the liquid phase collecting tank 300 and the liquid phase discharging tank 400 through pipelines; a pressure communication valve 600 and a collecting tank drain valve 700 are connected in parallel between the liquid phase collecting tank 300 and the liquid phase drain tank 400, and the rear part of the liquid phase drain tank 400 is connected with a drain tank drain valve 800;

and a vacuum backing pump 500, wherein the gas outlet pipeline of the liquid phase liquid discharge tank 400 is communicated with the vacuum backing pump 500, and the gas outlet of the vacuum backing pump 500 is communicated with the atmosphere.

The utility model discloses an environmental protection vacuum apparatus of non-condensable gas of condensation, at first, use the heat exchanger with non-condensable gas further condensation, make gas emission reach emission standard. Secondly, through the control of the temperature of the condensed water, the non-condensable gas can be condensed into liquid for reservation, and the blockage caused by the condensation of the non-condensable gas into solid due to supercooling can be controlled; thirdly, liquid drainage without shutdown is realized through the arrangement of each valve, and the problem of excessive non-condensable gas is not worried about; finally, the non-condensable gas is prevented from entering vacuum seal oil of the vacuum backing pump, the abrasion of the pump is reduced, the service life is prolonged, the oil change frequency of the vacuum seal oil is reduced, and the production cost is reduced.

Wherein, set up the heat exchanger below the lobe pump, adopt pipeline flange to connect, the heat exchanger can adopt low temperature water as coolant, and low temperature cooling water return water pipeline sets up temperature regulating valve 900, thermometer, carries out cooling water temperature control, and low temperature water temperature is 8 ℃ -10 ℃ to the cooling effect of control noncondensable gas.

Advantageously, the heat exchanger 200 is controlled by the return water temperature, and a temperature regulating valve 900 and a thermometer are arranged on the return water pipe; the temperature control valve 900 is a self-operated temperature control valve. Wherein self-operated temperature-sensing valve: the liquid is heated to expand and the liquid is incompressible to realize automatic adjustment. The liquid expansion within the temperature sensor is uniform, with the control acting as a proportional adjustment. When the temperature of the controlled medium changes, the volume of the temperature sensing liquid in the sensor expands or contracts along with the change of the temperature of the controlled medium. When the temperature of the controlled medium is higher than a set value, the temperature sensing liquid expands to push the valve core to close the valve downwards, so that the flow of the heating medium is reduced; when the temperature of the controlled medium is lower than a set value, the temperature sensing liquid contracts, the return spring pushes the valve core to open, and the flow of the heating medium is increased. The temperature control valve 900 may also be a siemens temperature control valve.

In one embodiment provided by the present invention, the front of the roots pump 100 is connected in series with a multi-stage roots pump; thereby achieving better vacuum requirements.

The utility model discloses a working process does:

the non-condensable gas is cooled by a heat exchanger and then condensed into a liquid phase, the liquid phase enters a liquid phase collecting tank, and gas-liquid separation is realized in the liquid phase collecting tank (because gas-liquid mixed gas flows at a high speed in a pipeline and enters the liquid phase collecting tank, the space is instantly enlarged, the flow rate is reduced, the gas cannot wrap the liquid, the liquid falls and precipitates by gravity, and the gas enters a vacuum backing pump from an upper gas outlet), so that the non-condensable gas is fully recovered; the condensate cannot enter a backing pump (oil ring vacuum pump), vacuum sealing oil of the backing pump (oil ring vacuum pump) is protected, the service cycle is prolonged, the oil change frequency is reduced, and the production cost is reduced. When the condensate of the liquid phase collection tank is excessive, opening a pressure communication valve between the liquid phase discharge tank and the liquid phase collection tank to balance the pressure of the two tanks, and opening a discharge valve of the collection tank to enable the condensate to flow into the discharge tank; and after the completion, closing the pressure communication valve and the collecting tank drain valve, and after the pressure of the drain tank is relieved, collecting the condensate after the condensate is discharged by the drain valve of the drain tank.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An environment-friendly vacuum device for condensing non-condensable gases, comprising:

a roots pump (100);

the heat exchanger (200) is connected behind the Roots pump (100), and the water temperature of the heat exchanger (200) is controlled to be 8-10 ℃;

the heat exchanger (200) is sequentially connected with the liquid phase collecting tank (300) and the liquid phase discharging tank (400) through pipelines; a pressure communication valve (600) and a collection tank drain valve (700) are connected in parallel between the liquid phase collection tank (300) and the liquid phase drain tank (400), and the rear part of the liquid phase drain tank (400) is connected with a drain tank drain valve (800);

and the gas outlet pipeline of the liquid phase liquid discharge tank (400) is communicated with the vacuum backing pump (500), and the gas outlet of the vacuum backing pump (500) is communicated with the atmosphere.

2. The environmentally friendly vacuum device for condensing non-condensable gases according to claim 1, wherein the heat exchanger (200) is controlled by return water temperature, and a temperature regulating valve (900) and a temperature meter are arranged on a return water pipe; the temperature regulating valve (900) adopts a self-operated temperature control valve.

3. An environmentally friendly vacuum device for condensing non-condensable gases as claimed in claim 1, wherein the roots pump (100) is connected in series with a multistage roots pump in front thereof.