Search

CN-121383744-B - Shell-and-tube condenser capable of automatically removing liquid film

CN121383744BCN 121383744 BCN121383744 BCN 121383744BCN-121383744-B

Abstract

The invention relates to the technical field of heat exchangers and discloses a shell-and-tube condenser capable of automatically removing liquid films, which comprises a shell, wherein one end of the shell is provided with a cold water inlet, the other end of the shell is provided with a cold water outlet, the upper end of the shell is provided with an air inlet, the lower end of the shell is connected with a liquid outlet pipe, a gas equalizing cover, a first finned tube and a second finned tube are arranged in the shell, a plurality of gas equalizing holes are arranged on the gas equalizing cover, the gas equalizing cover divides an inner cavity of the shell into a first cavity and a second cavity, the first cavity is internally provided with the second finned tube, the second cavity is internally provided with the first finned tube, and the outer wall of the first finned tube is provided with liquid guide fins. The invention actively breaks the continuity of the liquid film by arranging the fin tube and adding the liquid guide fin on the first fin tube, so that the liquid film does not accumulate and grow outside the tube, but accumulates in the liquid guide fin to drop in the form of liquid drops, thereby effectively solving the heat resistance problem caused by liquid film coverage and obviously improving the heat transfer efficiency of the whole equipment.

Inventors

  • HAN XIANJUN
  • WANG GENGHUI
  • SHI BENLIN
  • XU SHUWU
  • Xiu Siyuan
  • CHEN WENQING
  • LIU CHANGFENG
  • YANG YONGCAI
  • YU JIAWEI
  • BAO YIFAN
  • FENG YIBO

Assignees

  • 冰轮环境技术股份有限公司

Dates

Publication Date
20260512
Application Date
20251224

Claims (9)

  1. 1. The shell-and-tube condenser capable of automatically removing liquid films comprises a shell (14), wherein a cold water inlet (5) is formed in one end of the shell (14), a cold water outlet (1) is formed in the other end of the shell, an air inlet (2) is formed in the upper end of the shell (14), a liquid outlet pipe (6) is connected to the lower end of the shell (14), and the shell-and-tube condenser is characterized in that a uniform air cover (3), a first fin tube (9) and a second fin tube (15) are arranged in the shell (14), a plurality of uniform air holes are formed in the uniform air cover (3), the inner cavity of the shell (14) is divided into a first cavity (16) and a second cavity (17), a first cavity (16) is formed between the uniform air cover (3) and the inner wall of the shell (14), a working medium enters the first cavity (16) through the air inlet (2), the first cavity (16) is internally provided with the second fin tube (15), the second cavity (17) is internally provided with a plurality of fins (9), the first fin tube (9) is provided with a separation plate (11) and the inner wall of the shell (14) is provided with an integrated partition plate (11), the utility model discloses a cold water cooling device, including cold water inlet (5) and integrated supercooling unit (4), division board (11) are located be close to one end of cold water inlet (5), division board (11) with the inner wall cooperation of casing (14) forms supercooling chamber (18), integrated supercooling unit (4) are located in supercooling chamber (18), integrated supercooling unit (4) with stock solution package (8) are connected, become liquid through the gaseous working medium of condensation, gather in stock solution package (8) of below, and wherein some liquid in stock solution package (8) gets into integrated supercooling unit (4) through the pipeline and cools off, and the working medium after the supercooling is exported through drain pipe (6).
  2. 2. Shell-and-tube condenser for automatically removing liquid film according to claim 1, characterized in that the gas-equalizing hood (3) is coaxially arranged with the shell (14), the upper end of the gas-equalizing hood (3) is provided with two parallel gas-equalizing plates (31), and the height of the gas-equalizing plates (31) gradually decreases from the gas inlet (2) to two sides along the axial direction.
  3. 3. Shell-and-tube condenser for automatic removal of liquid film according to claim 1, characterized in that a plurality of said finned tubes one (9) are arranged in a square matrix inside said second cavity (17).
  4. 4. A shell-and-tube condenser for automatically removing liquid film according to claim 1 or 3, characterized in that each of said finned tubes one (9) is provided with two of said liquid guiding fins (91), said liquid guiding fins (91) being provided in the disengaging zone (21) of said finned tubes one (9).
  5. 5. The shell-and-tube condenser for automatically removing liquid film according to claim 4, wherein the total height of the liquid guiding fin (91) in the radial direction is H, ; H is the total height, m, of the liquid guide fin (91) in the radial direction; -wall thickness, m, of the finned tube one (9).
  6. 6. The shell-and-tube condenser for automatically removing liquid film according to claim 5, wherein the thickness of the liquid guiding fin (91) is gradually reduced in the radial direction, the thickness of the liquid guiding fin (91) is T, ; Wherein, the thickness of the T-liquid guide fin (91) is m, the total height of the H-liquid guide fin (91) in the radial direction is m; The wall thickness of the first fin tube (9), m, and h-the height of the liquid guiding fin (91) at a certain radius in the radial direction, m.
  7. 7. The shell-and-tube condenser for automatically removing liquid film according to claim 1, wherein the second finned tubes (15) are arranged in a ring shape in the first cavity (16), the spacing between adjacent second finned tubes (15) is S, ; Wherein: -the outer diameter, m, of the housing (14); -the outer diameter, m, of the gas-equalizing hood (3); -pitch of the annular array, m, -saturation temperature of Ts-working medium, K; -temperature of the working medium inlet, K.
  8. 8. The shell-and-tube condenser for automatically removing liquid film according to claim 7, wherein the inner diameter of the finned tube two (15) is , ; Wherein: -the inner diameter, m, of the finned tube two (15); -the outer diameter, m, of the housing (14); -the outer diameter, m, of the gas-equalizing hood (3); -the convective heat transfer coefficient in the tube, W/m 2 K; the convective heat transfer coefficient outside the tube, W/m 2 . Multidot.K.
  9. 9. Shell-and-tube condenser for automatic removal of liquid film according to claim 1, characterized in that said integrated supercooling unit (4) comprises two rows of tube bundles (41), two rows of tube bundles (41) extending along the radial direction of said shell (14) and two rows of tube bundles (41) being staggered.

Description

Shell-and-tube condenser capable of automatically removing liquid film Technical Field The invention relates to the technical field of heat exchangers, in particular to a shell-and-tube condenser capable of automatically removing liquid films. Background The shell-and-tube condenser is widely applied to the fields of chemical industry, refrigeration and the like, the heat transfer performance of the shell-and-tube condenser directly relates to the energy efficiency level of the whole system and the economical efficiency of operation, and in the gas-liquid condensation process, the gas phase working medium is subjected to phase change on the outer surface of the low-temperature tube wall to perform heat exchange. The existing shell-and-tube condenser has the following defects that as the running time of the condenser is increased, the thickness of a continuous liquid film formed when a gas phase working medium condenses on the outer wall of a tube is continuously increased, and the generated covering effect can obviously prevent the gas phase working medium from directly contacting with a cooling surface, so that the heat transfer coefficient is obviously attenuated, and the heat transfer performance of equipment is restricted. Experimental researches show that the thermal resistance of the liquid film accounts for 60% -80% of the total thermal resistance, and the heat exchange performance of the equipment is severely restricted. The exhaust gas of the compressor has a certain degree of superheat, the overheated working medium enters the condenser and is cooled to saturation, the phase change does not occur in the heat transfer process, the heat transfer efficiency is low, and the cylinder body of the condenser is oversized. In condenser exit area, lack effective supercooling structural design, the liquid that has condensed is difficult to further cool to below saturation temperature, and the supercooling degree is not enough can lead to liquid to take place the flash distillation at the follow-up, influences the stability of system, causes the energy extravagant. Disclosure of Invention The invention provides a shell-and-tube condenser capable of automatically removing a liquid film, aiming at the prior art. The shell-and-tube condenser capable of automatically removing the liquid film comprises a shell, wherein a cold water inlet is formed in one end of the shell, a cold water outlet is formed in the other end of the shell, an air inlet is formed in the upper end of the shell, a liquid outlet pipe is connected to the lower end of the shell, a gas equalizing cover, a first finned tube and a second finned tube are arranged in the shell, a plurality of gas equalizing holes are formed in the gas equalizing cover, the gas equalizing cover divides an inner cavity of the shell into a first cavity and a second cavity, the second finned tube is arranged in the first cavity, and liquid guide fins are arranged on the outer wall of the first finned tube. Based on the technical scheme, the invention can also be improved as follows: Preferably, the liquid storage bag is installed to the lower extreme of casing, be equipped with division board and integrated supercooling unit in the casing, the division board is located and is close to the one end of cold water inlet, the division board with the inner wall cooperation of casing forms the supercooling chamber, integrated supercooling unit is located the supercooling intracavity, integrated supercooling unit with the liquid storage bag is connected. Preferably, the gas equalizing cover and the shell are coaxially arranged, two parallel gas equalizing plates are arranged at the upper end of the gas equalizing cover, and the height of the gas equalizing plates gradually decreases from the gas inlet to two sides along the axial direction. Preferably, a plurality of the first fin tubes are arranged in a square matrix in the second cavity. Preferably, each first fin tube is provided with two liquid guide fins, and the liquid guide fins are arranged in a separation area of the first fin tube. Preferably, the total height of the liquid guide fin in the radial direction is H,; H is the total height of the liquid guide fin in the radial direction, m; wall thickness of the first fin tube, m. Preferably, the thickness of the liquid guide fin is gradually reduced along the radial direction, the thickness of the liquid guide fin is T,; Wherein, the thickness of the T-liquid guide fin is m, the total height of the H-liquid guide fin in the radial direction is m; The wall thickness of the first fin tube, m, and h, the height of the liquid guide fin at a certain radius in the radial direction, m. Preferably, the second finned tubes are annularly arranged in the first cavity, the spacing between adjacent second finned tubes is S,; Wherein: -the outer diameter of the shell, m; -the outer diameter of the gas-equalizing hood, m; -pitch of the annular array, m; -saturation temperature of wor