CN107537168A - A kind of regulation and control fixed gas scapus dynamic characteristic promotes the device of steam condensation - Google Patents

Abstract

The invention discloses a device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation, comprising an evaporation unit, a condensation unit, and a gas storage self-balancing unit located between the evaporation unit and the condensation unit; the gas outlet of the evaporation unit and the gas outlet of the condensation unit The gas inlet is connected through a steam pipe; the self-balancing unit of the gas storage includes a gas storage, and there is an elbow at the bottom of the gas storage, which is connected to the evaporation unit through a liquid level tube. The pipeline between the liquid level tubes is also provided with a stop valve and a check valve in turn; the top of the gas storage is provided with an air column tube connected to the condensing unit, and a thermocouple is installed in the gas column tube, and the thermocouple connects with the thermocouple line through the thermocouple wire. The data acquisition instrument is connected; a pressure gauge and a liquid level gauge are also arranged on the side wall of the gas storage. The device uses the self-balancing unit of the gas store to form and adjust the dynamic characteristics of the non-condensable gas column, thereby effectively alleviating the adverse effects of the non-condensable gas and promoting steam condensation, requiring less power, energy saving and environmental protection.

Description

A device for regulating the dynamic characteristics of non-condensable gas columns to promote steam condensation

technical field

The invention belongs to the technical field of condenser equipment manufacturing, and in particular relates to a device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation.

Background technique

Energy saving and emission reduction is the basic national policy of our country. Its main application field is the industrial sector. The horizontal shell-and-tube condenser is one of the main heat exchange equipment in the industrial sector. Its energy saving is particularly important. It is mainly composed of a cylindrical shell and a horizontal tube bundle. The refrigerant vapor condenses outside the horizontal tube, the condensate flows out from the bottom of the cylinder, and the cooling water flows back and forth in the horizontal tube for many times. The non-condensable gas contained in the horizontal shell-and-tube condenser is one of the important reasons for the reduction of condensation efficiency. For example, air with a mass content of 1% in water vapor can reduce the surface heat transfer coefficient by 60%. Therefore, the exclusion of non-condensable gas is an important key to ensure the design capability.

At present, non-condensable gas discharge outlets are often installed at places where non-condensable gas is easy to accumulate. However, during steam condensation, non-condensable gas cannot be effectively discharged. At the same time, too large and too small non-condensable gas apertures will cause steam carry loss, which will reduce the efficiency of non-condensable gas discharge.

Contents of the invention

In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide a device for regulating the dynamic characteristics of the non-condensable gas column to promote steam condensation. The device has a reasonable structural design, is simple and compact, requires less power, and is energy-saving and environmentally friendly.

The present invention is achieved through the following technical solutions:

The invention discloses a device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation, comprising an evaporation unit, a condensation unit, and a gas storage self-balancing unit located between the evaporation unit and the condensation unit; the gas outlet of the evaporation unit and the gas outlet of the condensation unit The gas inlet is connected by a steam pipe;

The gas storage self-balancing unit includes a gas storage, the bottom of the gas storage is provided with an elbow, the elbow is connected to the evaporation unit through a liquid level tube, and the liquid level tube is located at the water level point of the gas storage, between the elbow and the liquid level tube There are also shut-off valves and check valves on the pipeline in turn; the top of the gas storage is provided with an air column tube connected to the condensing unit, and a thermocouple is installed in the air column tube, and the thermocouple is connected to the data acquisition instrument through a thermocouple wire; There are also pressure gauges and liquid level gauges on the side walls of the gas storage.

Preferably, the evaporation unit includes an evaporator connected to the liquid level pipe, one end of the evaporator is connected to a water supply pipe, and the other end of the water supply pipe is connected to a booster pump; There is an electric heating rod inside.

Further preferably, a drain pipe is provided at the bottom of the evaporator, and a drain valve is provided on the drain pipe.

Preferably, the condensing unit includes a sleeve connected to the air column tube, a cold water pipe is passed through the sleeve, an inlet valve is provided at the water inlet end of the cold water pipe, and a water outlet valve is provided at the water outlet end.

Further preferably, a circulation pump is connected to the water inlet end of the cold water pipe.

Preferably, a water filling pipe is also provided on the top of the gas storage, and a water filling valve is provided on the water filling pipe.

Preferably, a steam valve is also provided on the steam pipe.

Preferably, a water discharge pipe is also provided at the bottom of the elbow, and a water discharge valve is provided on the water discharge pipe.

Compared with the prior art, the present invention has the following beneficial technical effects:

The device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation disclosed by the present invention uses a self-balancing unit of a gas store to form and adjust the dynamic characteristics of a non-condensable gas column, thereby effectively alleviating the adverse effects of the non-condensable gas and promoting steam condensation. The gas storage self-balancing unit is arranged between the evaporating unit and the condensing unit, and consists of a gas storage, an elbow, a liquid level pipe, and a stop valve and a check valve on the pipe. The self-balancing unit of the gas storage is a U-shaped structure, and the liquid level pipe is located at the water level point of the gas storage, so that if the liquid level of the gas storage rises, under the action of the liquid level pressure difference between the gas storage and the liquid level pipe, the redundant Condensed water will flow into the evaporation unit. The steam from the evaporation unit and the non-condensable gas in the system flow into the condensing unit to be condensed, and the non-condensable gas is pushed into the gas column tube and the gas phase space of the gas storage, and the non-condensable gas column accumulated in the gas storage will also affect the The steam produces reverse diffusion, increases the steam density, and also promotes the steam condensation. If the condensation load increases, more non-condensable gas will occupy the gas phase space of the gas storage. Therefore, the purpose of effectively adjusting the dynamic characteristics of the non-condensable gas column to promote steam condensation is achieved. The device has an ingenious structure, is simple and compact, requires less power, is energy-saving, environment-friendly and low in cost.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Among them: 1 is the booster pump; 2 is the water supply pipe; 3 is the solenoid valve; 4 is the evaporator; 5 is the steam pipe; 6 is the steam valve; 7 is the casing; 8 is the cold water pipe; 9 is the water inlet valve; 10 11 is the thermocouple line; 12 is the thermocouple; 13 is the data acquisition instrument; 14 is the gas storage; 15 is the elbow; 16 is the water discharge pipe; 17 is the water discharge valve; 20 is an electric heating rod; 21 is a liquid level gauge; 22 is a water outlet valve; 23 is a water valve; 24 is a water pipe; 25 is a drain valve; 26 is a drain pipe; 27 is an air column pipe; 28 is a pressure gauge; 29 level tube.

detailed description

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, the device disclosed by the present invention to regulate the dynamic characteristics of the non-condensable gas column to promote the condensation of steam includes an evaporation unit, a condensation unit and a gas storage self-balancing unit between the evaporation unit and the condensation unit; the gas outlet of the evaporation unit and the condensation unit The gas inlet of the unit is connected through a steam pipe 5; a steam valve 6 is also arranged on the steam pipe 5.

The gas storage self-balancing unit includes a gas storage 14, the bottom of the gas storage 14 is provided with an elbow 15, the elbow 15 is connected to the evaporation unit through a liquid level pipe 29, and the liquid level pipe 29 is located at the water level point of the gas storage 14. Also be provided with cut-off valve 18 and check valve 19 successively on the pipeline between pipe 15 and liquid level pipe 29; The top of the gas storage 14 is provided with an air column pipe 27 connected to the condensing unit, and a thermocouple 12 is arranged in the air column pipe 27, and the thermocouple 12 is connected with the data acquisition instrument 13 through a thermocouple wire 11. Also be provided with water-adding pipe 24 at the top of gas storage 14, be provided with water-adding valve 23 on water-adding pipe 24. A pressure gauge 28 and a liquid level gauge 21 are also provided on the side wall of the gas storage 14 .

The evaporation unit includes an evaporator 4 connected to a liquid level pipe 29, one end of the evaporator 4 is connected to a water supply pipe 2, and the other end of the water supply pipe 2 is connected to a booster pump 1; a solenoid valve is also provided on the water supply pipe 2 3. An electric heating rod 20 is provided inside the evaporator 4 . The bottom of the evaporator 4 is provided with a drain pipe 26, and the drain pipe 26 is provided with a drain valve 25.

The condensing unit includes a casing 7 connected to the air column pipe 27, a cold water pipe 8 is pierced in the casing 7, a water inlet valve 9 is provided at the water inlet end of the cold water pipe 8, and a water outlet valve 22 is arranged at the water outlet end. The water inlet end of the cold water pipe 8 is connected with a circulating pump 10 .

The device for regulating the dynamic characteristics of the non-condensable gas column of the present invention to promote the condensation of steam, when working:

Before work, close drain valve 25 and shut-off valve 18, open steam valve 6, water inlet valve 9 and water outlet valve 22, add water valve 23 and water discharge valve 17. Open the booster pump 1 and the solenoid valve 3, and add water to the evaporator 4 to be two-thirds of the liquid level. Then close the drain valve 17, add water to the level pipe 29 from the water pipe 24 for the gas store 14, close the stop valve 18 and the water valve 23. Turn on the electric heating rod 20, the steam generated by the evaporator 4 flows into the casing 7 along the steam pipe 5, and then the cooling water flows through the cold water pipe 8 driven by the circulation pump 10, because the surface temperature of the cold water pipe 8 is lower than the steam temperature , the steam is condensed, and the non-condensable gas is carried into the gas storage 14. At the same time, condensed water also flows into the gas storage 14 . After the condensation is stable, the shut-off valve 18 is opened, and if the water level in the gas storage 14 rises, water will pass through the check valve 19 along the elbow 15 and flow into the evaporator 4 . This will make the liquid level in the gas store 14 always in a constant position. As the steam flow increases, the cooling water flow increases, and the air accumulated in the condensing space is squeezed into the air column pipe 27 and enters the gas phase space of the gas storage 14. By reading the pressure gauge 28 on the gas storage 14 and The indication value of the thermocouple 12 is used to obtain the dynamic characteristics of the noncondensable gas column. The stability of steam condensation and heat pipe operation can be improved by adjusting the gas phase volume of the gas storage 14 .

Claims (8)

1. A device for regulating and controlling the dynamic characteristics of a non-condensable gas column to promote steam condensation, characterized in that it comprises an evaporation unit, a condensation unit and a self-balancing unit of a gas store between the evaporation unit and the condensation unit; the gas outlet of the evaporation unit and the condensation unit The gas inlet of the unit is connected by a steam pipe (5); The gas storage self-balancing unit includes a gas storage (14), the bottom of the gas storage (14) is provided with an elbow (15), the elbow (15) is connected to the evaporation unit through a liquid level pipe (29), and the liquid level pipe (29 ) is located at the water level point of the gas storehouse (14), and a shut-off valve (18) and a check valve (19) are also arranged successively on the pipeline between the elbow (15) and the liquid level pipe (29); the gas storehouse ( 14) The top is provided with an air column tube (27) connected to the condensing unit, and a thermocouple (12) is arranged in the air column tube (27), and the thermocouple (12) is connected to the data acquisition instrument ( 13) link to each other, also be provided with pressure gauge (28) and liquid level gauge (21) on the sidewall of gas storehouse (14). 2. the device for regulating and controlling the dynamic characteristics of the noncondensable gas column according to claim 1 to promote the condensation of steam is characterized in that, the evaporation unit comprises an evaporator (4) connected to the liquid level pipe (29), and the evaporator (4 ) is connected to a water supply pipe (2), and the other end of the water supply pipe (2) is connected to the booster pump (1); an electromagnetic valve (3) is also provided on the water supply pipe (2), and the evaporator (4) An electric heating rod (20) is arranged inside. 3. The device for regulating and controlling the dynamic characteristics of the noncondensable gas column according to claim 2 to promote steam condensation, characterized in that, the bottom of the evaporator (4) is provided with a drainpipe (26), and the drainpipe (26) is provided with a drain valve (25). 4. the device for regulating and controlling the dynamic characteristics of the noncondensable gas column according to claim 1 to promote the condensation of steam is characterized in that, the condensing unit comprises a sleeve (7) connected to the gas column pipe (27), and the sleeve (7) ) is provided with a cold water pipe (8), the water inlet end of the cold water pipe (8) is provided with a water inlet valve (9), and the water outlet end is provided with an outlet valve (22). 5. The device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation according to claim 4, characterized in that, the water inlet end of the cold water pipe (8) is connected with a circulating pump (10). 6. According to the device for regulating and controlling the dynamic characteristics of non-condensable gas column according to any one of claims 1 to 5 to promote steam condensation, it is characterized in that, a water-adding pipe (24) is also provided at the top of the gas storehouse (14). The water pipe (24) is provided with a water filling valve (23). 7. The device for regulating the dynamic characteristics of a non-condensable gas column to promote steam condensation according to any one of claims 1 to 5, characterized in that a steam valve (6) is also provided on the steam pipe (5). 8. According to the device for regulating and controlling the dynamic characteristics of noncondensable gas column according to any one of claims 1 to 5 to promote steam condensation, it is characterized in that, a water discharge pipe (16) is also provided at the bottom of the elbow (15), and the water discharge pipe (16) is provided with drain valve (17).