CN-224215892-U - Shell-and-tube heat exchanger and mariculture heat pump unit

CN224215892UCN 224215892 UCN224215892 UCN 224215892UCN-224215892-U

Abstract

The utility model belongs to the field of heat exchangers, and discloses a shell-and-tube heat exchanger and a mariculture heat pump unit adopting the shell-and-tube heat exchanger, wherein the shell-and-tube heat exchanger comprises a tube box, a tube plate, a heat exchange tube bundle and a heat exchanger cylinder body, and the heat exchanger cylinder body comprises a heat exchanger cylinder body A and a heat exchanger cylinder body B which are connected through a cylinder body flange and a threaded fastener; the mariculture heat pump unit comprises a compressor, a condenser, an expansion valve and a shell-and-tube heat exchanger which are connected through refrigerant pipelines, wherein a bracket at the bottom of a cylinder body of the heat exchanger is fixedly connected with a unit frame through threaded fasteners, and when the heat exchange tube bundle is required to be cleaned or overhauled, only one section of cylinder body is required to be disassembled and assembled, so that the disassembly and assembly workload is less, the cleaning operation efficiency is high, the required working space is small during the cleaning operation, and the field operation is convenient.

Inventors

GENG YANG
MA XINJUN
WANG WENJING
WANG SONGKANG

Assignees

山东科灵节能装备股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250524

Claims (9)

1. The shell-and-tube heat exchanger is arranged horizontally and comprises a tube box, a tube plate and a heat exchanger cylinder which are coaxially arranged and fixed together, wherein a heat exchange tube bundle is arranged in the heat exchanger cylinder, The heat exchanger cylinder body is arranged in a segmented mode and comprises a heat exchanger cylinder body A and a heat exchanger cylinder body B which are detachably and fixedly connected together, cylinder body flanges are respectively arranged at two ends of the heat exchanger cylinder body A, a cylinder body flange is arranged at one end of the heat exchanger cylinder body B, the other end of the heat exchanger cylinder body B is a closed end, the heat exchanger cylinder body A and the heat exchanger cylinder body B are fixedly connected through the cylinder body flange and a threaded fastener, the heat exchanger cylinder body A is provided with a water gap A, and the heat exchanger cylinder body B is provided with a water gap B; A partition plate is arranged in the pipe box, the inner cavity of the pipe box is partitioned into a liquid separating cavity and an air collecting cavity by the partition plate, the pipe box is connected with a refrigerant pipe orifice A communicated with the liquid separating cavity and a refrigerant pipe orifice B communicated with the air collecting cavity; The tube plate is provided with a plurality of tube holes, the tube holes are divided into a liquid separating tube hole area corresponding to the position of the liquid separating cavity and a gas collecting tube hole area corresponding to the position of the gas collecting cavity, a tube plate non-hole area is arranged between the liquid separating tube hole area and the gas collecting tube hole area, the periphery of the tube plate is provided with a plurality of tube plate connecting through holes, and the tube body flange at one end of the tube body A of the heat exchanger, the tube plate connecting through holes and the tube box are fixedly connected through threaded fasteners; The heat exchange tube bundle is a U-shaped heat exchange tube bundle and is supported in the heat exchanger cylinder body through a baffle plate, one opening end of the U-shaped heat exchange tube bundle is connected with the tube hole of the gas collecting tube hole area and communicated with the gas collecting cavity, and the other opening end of the U-shaped heat exchange tube bundle is connected with the tube hole of the liquid separating tube hole area and communicated with the liquid separating cavity.
2. The shell-and-tube heat exchanger as claimed in claim 1, wherein a bracket a is fixed to the bottom of the heat exchanger cylinder a, and a bracket B is fixed to the bottom of the heat exchanger cylinder B.
3. The shell and tube heat exchanger as claimed in claim 1, wherein a sealing gasket A is provided between the tube box and the tube sheet, and a sealing gasket B is provided between the tube sheet and the tube flange of the heat exchanger tube A and between the heat exchanger tube A and the tube flange of the heat exchanger tube B.
4. A shell and tube heat exchanger as claimed in claim 3, wherein the sealing gasket B comprises an annular body provided with a plurality of concentric and uniformly distributed gasket through holes.
5. A shell-and-tube heat exchanger as claimed in claim 3, wherein the sealing gasket a comprises an annular body, a plurality of concentric and uniformly distributed gasket through holes are formed in the annular body, a separation part is arranged in the annular body along the diameter direction, the separation part corresponds to the separation plate in the tube box, the separation part separates the interior of the sealing gasket a into a liquid separating half hole and a gas collecting half hole which are not communicated, the liquid separating half hole is communicated with the liquid separating cavity, and the gas collecting half hole is communicated with the gas collecting cavity.
6. The shell and tube heat exchanger as set forth in claim 1, wherein the tube cassette is a flat tube cassette.
7. The mariculture heat pump unit comprises a compressor, a condenser, an expansion valve and an evaporator which are connected through refrigerant pipelines, and is characterized in that the evaporator adopts the shell-and-tube heat exchanger as claimed in any one of claims 1 to 6, the heat exchanger cylinder is fixedly connected with a unit frame through a bracket at the bottom of the heat exchanger cylinder by adopting a threaded fastener, a refrigerant pipe orifice A is connected with an outlet of the expansion valve, and a refrigerant pipe orifice B is connected with an inlet of the compressor.
8. The mariculture heat pump assembly of claim 7, wherein the water port A is a water inlet and is connected with culture sewage, and the water port B is a sewage outlet.
9. The mariculture heat pump assembly of claim 7, wherein the water port a is a water inlet, fresh sea water is connected, and the water port B is a water outlet.

Description

Shell-and-tube heat exchanger and mariculture heat pump unit Technical Field The utility model relates to the technical field of heat pump units and parts thereof, in particular to a shell-and-tube heat exchanger and a mariculture heat pump unit adopting the same. Background A heat exchanger is a device that transfers heat between two or more fluids having different temperatures. Currently, among the heat exchangers of many types, a shell-and-tube heat exchanger is used, wherein a U-shaped tube heat exchanger is one of the most commonly used shell-and-tube heat exchangers, and comprises a tube box, a tube plate, a heat exchanger cylinder, a U-shaped heat exchange tube bundle arranged in the heat exchanger cylinder and other main components. In the marine product cultivation industry, the seawater temperature is relatively low in winter, and if the water temperature is too low in marine product cultivation, the growth speed of marine products is reduced. In order to meet the temperature required by the normal growth of marine products, marine product cultivation industry generally adopts a marine product cultivation heat pump unit so as to effectively improve the temperature of a cultivation water area, an evaporator used in the marine product cultivation heat pump unit is generally a shell-and-tube heat exchanger, and discharged cultivation sewage or fresh seawater is used as a hot water source at the evaporator side of the heat pump unit. Because the bait and the sewage discharge matters required by the growth of marine products are accumulated in the culture sewage for a long time, sediment exists in fresh sea water, impurities existing in the shell side heat exchange medium are easy to form dirt to be attached to the wall surface of the heat exchange tube along with the long-time operation of the heat pump unit, the heat resistance of the heat exchanger is increased along with the formation of dirt on the wall of the heat exchange tube, the heat exchange efficiency is reduced, and the effect of the heat exchanger is seriously affected. Therefore, the heat exchange tube bundle of the heat exchanger needs to be cleaned frequently, dirt is removed, and the heat exchange efficiency is improved. When cleaning dirt on the outer side of the heat exchange tube wall or overhauling, the heat exchanger needs to be disassembled, and the common operation mode is that the tube box, the tube plate and the heat exchange tube bundle are completely extracted from the heat exchanger cylinder, the heat exchange tube bundle is cleaned, and then assembled and restored after the heat exchange tube bundle is cleaned. The conventional operation mode has the defects that on one hand, the combined weight of the tube box, the tube plate and the heat exchange tube bundle is large, the disassembly and assembly workload is large, and on the other hand, the tube box, the tube plate and the heat exchange tube bundle are completely extracted from the heat exchanger cylinder body, long/large operation space is required, and the operation mode is difficult to use in the occasion of insufficient operation space. Disclosure of Invention In view of the above, the utility model aims to provide a shell-and-tube heat exchanger with less disassembly and assembly workload and less operation space requirement during cleaning or maintenance. Based on the same technical conception, the utility model aims to provide a mariculture heat pump unit adopting the shell-and-tube heat exchanger. The technical scheme of the utility model is that the shell-and-tube heat exchanger comprises a tube box, a tube plate and a heat exchanger cylinder which are coaxially arranged and fixed together, wherein a heat exchange tube bundle is arranged in the heat exchanger cylinder, the heat exchanger cylinder is arranged in a segmented mode and comprises a heat exchanger cylinder A and a heat exchanger cylinder B which are detachably and fixedly connected together, cylinder flanges are respectively arranged at two ends of the heat exchanger cylinder A, one end of the heat exchanger cylinder B is provided with a cylinder flange, the other end of the heat exchanger cylinder B is a closed end, the heat exchanger cylinder A and the heat exchanger cylinder B are fixedly connected through the cylinder flange and a threaded fastener, the heat exchanger cylinder A is provided with a water gap A, and the heat exchanger cylinder B is provided with a water gap B; the tube box is internally provided with a partition plate, the inner cavity of the tube box is divided into a liquid separating cavity and an air collecting cavity by the partition plate, the tube box is connected with a refrigerant pipe orifice A communicated with the liquid separating cavity and a refrigerant pipe orifice B communicated with the air collecting cavity, the tube plate is provided with a plurality of tube holes, the tube holes are divided into a liquid separating tube hole area corresponding to the liquid se