CN107606965B

CN107606965B - Condensing system

Info

Publication number: CN107606965B
Application number: CN201710912511.4A
Authority: CN
Inventors: 潘建学; 赵月忠
Original assignee: Guangxi Xinfa Aluminum Electric Co ltd
Current assignee: Guangxi Xinfa Aluminum Electric Co ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2020-05-19
Anticipated expiration: 2037-09-29
Also published as: CN107606965A

Abstract

The invention discloses a condensing system, and belongs to the technical field of condensation. It comprises a condensing tower, a tank body and a water tank; the condensing tower with vacuum negative pressure sucks hot steam and flushes the hot steam with circulating water in the condensing tower, most of the steam is condensed and discharged to the water tank, and part of non-condensable gas is gathered at the top of the condensing tower; the tank body is of a pipe fitting structure with upper and lower necking ports, the inner cavity of the tank body is divided into an upper cavity and a lower cavity by a pore plate, the upper opening is smaller than the lower opening, and the area of the upper opening is equal to the total hole area of the pore plate; circulating water flows into the lower chamber from the upper chamber and finally flows into the water tank from the lower opening, and the lower chamber has the functions of providing vacuum negative pressure and condensing partial steam. The condensing system has the function and effect of double condensation, and the condensing effect is rapid and ideal. In addition, the tank body has the function of providing vacuum negative pressure, the condition of high vacuum degree required by the process is met, the burden of vacuum equipment is reduced, and the production cost is reduced.

Description

Condensing system

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of condensation, in particular to a condensation system of a falling film evaporator.

[ background of the invention ]

The hot vapor of the falling-film evaporator is sucked into the condensing tower through the vacuum condition in the condensing tower and rushes with liquid water, so that the hot vapor is condensed and liquefied. At present, a vacuum pump is generally used to evacuate the interior of the condensation tower. However, the single vacuum pump evacuates the gas in the condensing tower, which not only reduces the speed of increasing the vacuum degree, but also makes the final maximum vacuum degree not meet the requirement of the tubular falling-film evaporator.

[ summary of the invention ]

Aiming at the technical problems, the invention provides a condensation system, which aims to reduce the load of a vacuum pump, reduce energy consumption and maintenance cost, enable the condensation effect to be stronger, enable the vacuum degree in a condensation tower to be high in speed and high in vacuum degree, and meet the requirements of a tubular falling-film evaporator.

The technical scheme adopted by the invention is as follows:

a condensing system comprises a condensing tower, a tank body, a water tank, a driving water pump and a vacuum pump; a steam inlet pipe and a circulating water inlet pipe are arranged on the side surface of the condensing tower, a gas outlet pipe is arranged at the top of the condensing tower, and a condensed water outlet pipe is arranged at the bottom of the condensing tower; the tank body is a cylindrical pipe fitting with an upper necking and a lower necking, the upper opening is smaller than the lower opening, the tank body is divided into an upper chamber and a lower chamber by a pore plate, the total pore area of the pore plate is equal to the area of the upper opening, and a pipe fitting communicated with a gas outlet pipe at the top of the condensing tower is arranged on the side surface of the lower chamber; the condensing tower and the tank body are arranged above the water surface of the water tank, and the condensed water outlet pipe is connected with the water tank; the lower opening of the tank body is connected with the water tank by a pipeline, and the pipeline extends into the position below the water surface of the water tank; the water outlet pipe of the driving water pump is communicated with the circulating water inlet pipe and is connected with a pipeline communicated with the upper opening of the tank body in a branching manner, and the water inlet pipe of the driving water pump extends into the water body of the water tank; the vacuum pump is connected with the condensing tower and used for providing vacuum conditions for the condensing tower.

Furthermore, the pore plate is arranged on the tank body at a height of 3/5 of the height of the tank body, and the number of the pores of the pore plate is more than 10 and the pores are uniformly distributed on the pore plate.

Further, the area ratio of the upper opening and the lower opening of the tank body is as follows: an upper opening: lower opening ═ 1: (1.5-2).

By adopting the technical scheme of the invention, the invention has the following beneficial effects:

1. the tank body in the condensing system can not only provide vacuum conditions for the condensing tower, but also can condense part of non-condensable gas.

2. The condensing system reduces the amount of electricity consumed by the activation of the vacuum pump; the maintenance is simple, and the management is convenient.

[ description of the drawings ]

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

FIG. 2 is a top view of the orifice plate 21 of FIG. 1;

the system comprises a condensation tower 1, a condensate water outlet pipe 11, a steam inlet pipe 12, a gas outlet pipe 13, a circulating water inlet pipe 14, a tank body 2, a pore plate 21, a water tank 3, a driving water pump 4, a driving water pump water outlet pipe 41 and a vacuum pump 5.

[ detailed description ] embodiments

In order to make the technical solution of the present invention more clearly understood, the present invention will be further described in detail with reference to the drawings and specific embodiments.

Referring to fig. 1-2, a condensing system comprises a condensing tower 1, a tank 2, a water tank 3, a driving water pump 4 and a vacuum pump 5; the condensing tower 1 comprises a steam inlet pipe 12, a circulating water inlet pipe 14, a gas outlet pipe 13 and a condensed water outlet pipe 11; a steam inlet pipe 12 and a circulating water inlet pipe 14 are arranged on the side surface of the condensing tower 1, the circulating water inlet pipe 14 is higher than the steam inlet pipe 12, and the steam and the circulating water form opposite impact in the condensing tower 1. The top of the condensing tower 1 is spherical, and a gas outlet pipe 13 is arranged at the center, and a condensed water outlet pipe 11 is arranged at the bottom for discharging condensed water in the condensing tower 1.

Jar body 2 is the cylinder pipe fitting of throat from top to bottom, and the area proportion of upper shed and under shed is: an upper opening: lower opening ═ 1: (1.5-2), the tank body 2 is divided into an upper chamber and a lower chamber by an orifice plate 21 arranged at the height of 3/5 of the tank body, the number of the holes of the orifice plate 21 is more than 10, and the holes are uniformly distributed on the orifice plate (as shown in figure 2). The total hole area of the hole plate 21 is equal to the upper opening area, and a pipe communicated with the gas outlet pipe 13 at the top of the condensing tower 1 is arranged on the side surface of the lower chamber. The non-condensable gases in the condensation tower enter the lower chamber through a gas outlet pipe 13.

The condensing tower 1 and the tank body 2 are arranged above the water surface of the water tank 3, and the condensing tower 1 and the tank body 2 are arranged on the same horizontal plane. A condensed water outlet pipe 11 is connected with the water tank 3, and condensed water in the condensing tower 1 flows into the water tank 3 from the condensed water outlet pipe; the lower opening of the tank body 2 is connected with the water tank 3 by a pipeline, and the pipeline extends into the water below the water surface of the water tank 3; the water outlet pipe of the driving water pump 4 is communicated with the circulating water inlet pipe 14 and is branched to form a pipeline which is connected with the upper opening of the tank body 2. The water inlet pipe of the driving water pump 4 extends into the water body of the water tank 3, the driving water pump 4 is started, and liquid water in the water tank 3 flows into the upper chamber of the tank body 2 and the condensing tower 1; in the condensing tower 1 with vacuum negative pressure, steam is sucked from a steam inlet pipe 12 and is flushed with circulating water in the condensing tower 1, most of the steam is condensed and liquefied, and flows into a water tank 3 from a condensed water outlet pipe 11; part of the non-condensable gas rises and gathers on the top of the ball; the liquid water flowing into the tank body 2 flows out from the lower opening after being divided by the pore plate 21; because of the water flow, the lower chamber forms vacuum negative pressure, and part of the non-condensable gas at the top of the condensing tower 1 is sucked into the lower chamber and further condensed and liquefied by liquid water, and finally flows into the water tank 3 from the lower opening.

The vacuum pump 5 is a water-circulating vacuum pump, is connected with the condensing tower 1 and is used for providing vacuum conditions for the condensing tower 1.

Claims

1. A condensing system is characterized by comprising a condensing tower, a tank body, a water tank, a driving water pump and a vacuum pump; a steam inlet pipe and a circulating water inlet pipe are arranged on the side surface of the condensing tower, a gas outlet pipe is arranged at the top of the condensing tower, and a condensed water outlet pipe is arranged at the bottom of the condensing tower; the tank body is a cylindrical pipe fitting with an upper necking and a lower necking, the upper opening is smaller than the lower opening, the tank body is divided into an upper chamber and a lower chamber by a pore plate, the total pore area of the pore plate is equal to the area of the upper opening, and a pipe fitting communicated with a gas outlet pipe at the top of the condensing tower is arranged on the side surface of the lower chamber; the condensing tower and the tank body are arranged above the water surface of the water tank, and the condensed water outlet pipe is connected with the water tank; the lower opening of the tank body is connected with the water tank by a pipeline, and the pipeline extends into the position below the water surface of the water tank; the water outlet pipe of the driving water pump is communicated with the circulating water inlet pipe and is connected with a pipeline communicated with the upper opening of the tank body in a branching manner, and the water inlet pipe of the driving water pump extends into the water body of the water tank; the vacuum pump is connected with the condensing tower and is used for providing vacuum conditions for the condensing tower; the pore plate is arranged on the tank body at the height of 3/5, the number of the pores of the pore plate is more than 10, and the pores are uniformly distributed on the pore plate.

2. A condensing system according to claim 1, wherein the ratio of the area of said upper opening to said lower opening is: an upper opening: lower opening ═ 1: (1.5-2).

3. A condensing system according to claim 1, wherein said tank is disposed at the same level as said condensing tower.