58 results about "Counter flow" patented technology

The present invention relates to a secondary cross-flow high-efficiency waste heat recovery heat exchanger, which belongs to the field of heat exchangers. The heat exchanger includes a housing, the periphery of which is provided with a plurality of flange openings. The housing is divided into a first chamber and a second chamber by a profile. A hot medium inlet is provided on the left side of the first chamber, and a cold medium outlet is provided on the front side of the first chamber; a cold medium inlet is provided on the front side of the second chamber, and a hot medium outlet is provided on the right side of the second chamber; wherein the U-shaped circulation path of the cold medium intersects the circulation path of the hot medium. The present invention transforms the heat exchange form of the heat exchanger from the original cross-flow to a combination of cross-flow and counter-flow, greatly improving the value of the temperature difference correction and ultimately improving the heat exchange efficiency of the product. In addition, the pipeline layout is relatively compact and occupies little space.

The invention discloses a dry-wet integrated falling film evaporation heat exchanger which is composed of a high-temperature medium channel, heat pipe bundles with different evaporation temperatures, a partition plate and a low-temperature medium channel. The high-temperature medium channel and the low-temperature medium channel are separated by the partition plate to form independent channels for high-temperature media and low-temperature media, and the heat pipe bundle penetrates through the partition plate and is in sealed connection, so that the high-temperature media and the low-temperature media exchange heat under the complete isolation condition. The heat pipe bundles are sequentially arranged into a high-temperature tube bundle, a medium-temperature tube bundle and a low-temperature tube bundle in the flowing direction of a high-temperature medium, the low-temperature tube bundle, the medium-temperature tube bundle and the high-temperature tube bundle are sequentially arranged in the flowing direction of a low-temperature medium, and a high-low-temperature medium countercurrent flow heat exchange and complete cascade heat transfer model is formed. And the heat pipe bundle partially or completely adopts falling film evaporation heat transfer in the low-temperature medium channel. The heat pipe heat exchanger overcomes the defects that the heat transfer temperature difference of a traditional heat pipe heat exchanger is reduced along the process and the heat transfer coefficient is low, and is particularly suitable for application scenes where heat transfer is isolated and low-temperature media need to be heated and humidified at the same time.

A plate type gas-gas heat exchanger (400) comprises a casing (402) having a first end (402a) and a second end (402b). A first fluid inlet (404) and a second fluid outlet (410) are configured in a first portion (402a-1) and a second portion (402a-2) of the first end (402a). The first fluid inlet (404) receives a first fluid (F1). A second fluid inlet (406) and a first fluid outlet (408) are configured in a first portion (402b-1) and a second portion (402b-2) of the second end (402b) respectively. The second fluid inlet (406) receives a second fluid (F2). The first and second fluid outlets (408, 410) allows exit of the first and second fluids (F1, F2) respectively from the heat exchanger (400), after heat exchange. The first and second fluid (F1, F2) flow in opposite directions, creating a true counter-current flow pattern across an entire length of the heat exchanger (400).

This utility model discloses a counter-flow cooling tower, including a cooling tower shell, a fan installed on the top of the cooling tower shell, and packing material inside the cooling tower shell. A disassembly and assembly mechanism is provided inside and at the front of the cooling tower shell. The disassembly and assembly mechanism includes a connecting plate fixedly connected to the front of the packing material, and a strip-shaped cylinder fixedly connected to the front of the connecting plate. Through the disassembly and assembly mechanism, utilizing the sliding cooperation between the connecting plate and the fixed square rod, and the guiding support of the slider for the packing material, the packing material can be directly pulled out or inserted along the fixed square rod, avoiding the cumbersome disassembly process of bolt tightening or custom clips in traditional structures. Simultaneously, the spring inside the strip-shaped cylinder, along with the buckle plate and the clip plate, forms an automatic locking structure. During replacement, only the buckle plate needs to be pressed and the clip plate slid, allowing disassembly and assembly to be completed without professional tools, significantly reducing downtime for maintenance.

The utility model provides a reverse flow type spiral pipe heat exchanger which comprises an outer pipe body, an inner pipe body, a spiral heat exchange pipe and a water conveying pipe, the two ends of the outer pipe body and the two ends of the inner pipe body are connected with plugs in a sealed mode, the inner pipe body is arranged in the outer pipe body through an inner support, and a gap between the outer pipe body and the inner pipe body is a heat exchange gap. The spiral heat exchange pipe is installed in the heat exchange gap, the two ends of the spiral heat exchange pipe are connected with the sealed water inlet assembly, and the two water conveying pipes are arranged at the upper end and the lower end of the outer pipe body correspondingly. The first heat exchange liquid enters the heat exchange gap through the water conveying pipe, the second heat exchange liquid enters the spiral heat exchange pipe to achieve heat exchange with the first heat exchange liquid, the spiral heat exchange pipe is of a spiral structure, the heat exchange efficiency can be improved, and when the spiral heat exchange pipe is installed in the connecting groove, the connecting sealing performance of the spiral heat exchange pipe and the sleeve can be guaranteed through the elasticity of the spiral heat exchange pipe. The pipeline structure is simple in design, low in production cost and capable of being used for meeting the heat exchange requirement of the solution dehumidifier.

The present application relates to longitudinal finned tube heat exchanger with built-in heat exchange sleeve and nozzle and its cooling tower, comprising heat exchange array with several longitudinal finned tube heat exchange units, flow divider, sprinkling water distributor, liquid collector. By setting heat exchange tube for counter flow heat exchange inside longitudinal finned tube, the heat exchange efficiency of heat exchanger is greatly improved, by setting upper connection assembly with uniform sprinkling on longitudinal finned tube, the uniformity and surface film forming property of sprinkling water are improved, so that the comprehensive heat exchange performance of heat exchanger in indirect evaporation process is greatly improved. The closed cooling tower prepared by using the longitudinal finned tube heat exchanger of the present application has the advantages of small volume, large refrigerating capacity and the like.

An isolation core is used to isolate an air conditioning (AC) unit and an external environment such as an enclosure to be cooled. An isolation core may take the form of a cross-flow or counterflow heat exchanger which acts to thermally couple the flows of an AC unit and an enclosure air inlet and return without permitting the flows to intermix. The isolation core thus facilitates cooling of enclosures while isolating flammable refrigerant from the enclosure air, requiring the refrigerant to remain within the AC unit even if an interior component of the AC unit such as a cooling coil, etc., leaks.

To provide an apparatus (100) for thermal energy storage and conduction.SOLUTION: The apparatus (100) includes a thermal energy input device (1) having a bed of fluidizable solid particles received in a casing and exposed to a thermal energy source to function as a heat storage means, a heat exchange means (3) operating in counter-current flow and configured for exchange of thermal energy between a heated vector mass of the bed particles and a working fluid, a transport means (5) configured for supplying the vector mass of the bed particles from the device (1) to the heat exchange means (3) and for returning at least part of the vector mass to the device (1) downstream of the heat exchange means (3), and a control unit (10) associated with a parameter detection means (6).SELECTED DRAWING: Figure 4

The utility model relates to the technical field of counter flow type cooling towers, in particular to a counter flow type cooling tower with external heat dissipation flow channels, which comprises a tower body and a water pump, a heat absorption flow channel is arranged in the tower body, the heat dissipation flow channels are arranged outside the two sides of the tower body, and the outer wall of the heat absorption flow channel is attached to the heat dissipation flow channels through a fixing frame; a water collecting tank is arranged at the bottom of the tower body, the input end of the water pump is communicated with the water collecting tank, and the output end of the water pump is communicated with the heat dissipation flow channel through a water conveying pipe; wherein a filter plate is arranged between the pair of water conveying pipes through a connecting pipe, the periphery of the filter plate is coated with heat preservation cotton through a fixing assembly, and the heat preservation cotton and the filter plate can be fixed through a fixing piece, so that the situation that normal use is affected under the condition that the temperature of the environment where the cooling tower is located is low is avoided; and the flow channel can be prevented from being blocked by impurities contained in the cooling water, the structure is simple, operation is easy and convenient, and practicability is high.

A gas treatment component includes a cross-flow heat exchanger and a counter-flow heat exchanger arranged in series with the cross-flow heat exchanger. The cross-flow heat exchanger and the counter-flow heat exchanger each include a core having a stack of heat exchanger plates, and the heat exchanger plates of the cross-flow heat exchanger form first channels for a first gas flow passing the cross-flow heat exchanger and form second channels for a second gas flow passing the cross-flow heat exchanger. A first distance between neighbouring heat exchanger plates forming the first channels is smaller than a second distance between neighbouring heat exchanger plates forming the second channels. The cross-flow heat exchanger includes a second outlet for the second gas flow to leave the cross-flow heat exchanger and a deflector plate for deflecting a portion of the second gas flow leaving the cross-flow heat exchanger at the second outlet.

The present invention provides a plate heat exchanger for centralized heating, wherein the heat exchange tube is a plate structure, the plate structure includes a long side and a short side, an inner partition is arranged inside the plate structure, the inner partition connects the two long sides of the plate structure, and divides the inner cavity of the plate structure into a first inner cavity and a second inner cavity, a partition wall is arranged inside the first head and the second head, and the first head is divided into a first cavity and a second cavity, and the second head is divided into a first cavity and a second cavity, wherein the first cavity of the first head is connected to the first cavity of the plate structure, and the first cavity of the plate structure is connected to the first cavity of the second head, wherein the second cavity of the first head is connected to the second cavity of the plate structure, and the second cavity of the plate structure is connected to the second cavity of the second head. The present invention divides the heat exchange tube into two parts, and the two parts of fluid flow countercurrently to each other, so that the heat exchange in the overall flow direction of the heat exchange tube is uniform, thereby enhancing heat transfer.

An isolation core is used to isolate an air conditioning (AC) unit and an external environment such as an enclosure to be cooled. An isolation core may take the form of a cross-flow or counterflow heat exchanger which acts to thermally couple the flows of an AC unit and an enclosure air inlet and return without permitting the flows to intermix. The isolation core thus facilitates cooling of enclosures while isolating flammable refrigerant from the enclosure air, requiring the refrigerant to remain within the AC unit even if an interior component of the AC unit such as a cooling coil, etc., leaks.

The utility model discloses a counter flow type cooling tower, which comprises a frame structure and a cooling tower body arranged on the frame structure, an air duct, a water collector, a water distribution system and a filler are sequentially arranged along the cooling tower body from top to bottom, a fan is arranged in the air duct, the filler comprises a filler layer with an S-wave-shaped surface, and the surface of the filler layer is provided with a water inlet and a water outlet. The wave crest and the wave trough of the S wave form are arc-shaped, and the extending direction of the S wave is consistent with the water flow direction and the air flow direction; according to the utility model, not only is the heat exchange efficiency higher, but also dirt, impurities or sediments are not easy to accumulate between wave crests and wave troughs of the filler, water flow blockage caused by blockage is avoided, and the cooling efficiency is ensured.

The utility model relates to the technical field of heat exchanger, propose a kind of stepped countercurrent subsection heat exchange device and the application of water heater thereof, stepped countercurrent subsection heat exchange device, including heat exchange main part, the heat exchange main part includes heat exchange area and heat exchange pipeline;Heat exchange area is equipped with several sections, several heat exchange areas are communicated with each other and mutually independent interval arrangement, and heat exchange pipeline connected with each other is equipped in each heat exchange area;Heat exchange pipeline is equipped with the heat insulation pipe for preventing the heat transfer between adjacent two heat exchange areas, to make the cold, hot fluid of each heat exchange area realize mutual non-interference in heat exchange process, and independent heat exchange, and each heat exchange area is formed heat transfer separation by heat insulation pipe, and the stepped temperature difference is formed between each heat exchange area.The subsection design of heat exchange area avoids the overall temperature difference homogenization problem caused by heat diffusion of traditional device, and heat exchange pipeline completes efficient heat exchange independently in each heat exchange area, improves overall heat exchange efficiency.

The invention relates to the technical field of air conditioners, in particular to an air conditioning system. The CO2 heat pump air conditioning system aims at solving the problem that an existing CO2 heat pump air conditioning system is poor in refrigeration effect and heat exchange effect. In order to achieve the purpose, the air conditioning system comprises a refrigerant circulating system and a liquid circulating system, the refrigerant circulating system comprises a compressor, an ejector, a first outdoor heat exchanger, a second outdoor heat exchanger, a third outdoor heat exchanger and the like, and the liquid circulating system comprises a first indoor heat exchanger and the like. Liquid in the liquid circulation system sequentially flows through the second outdoor heat exchanger and the third outdoor heat exchanger for heat exchange and then enters the first indoor heat exchanger, the second outdoor heat exchanger and the third outdoor heat exchanger can be used for refrigeration, and the flowing directions of refrigerants and the liquid in the two outdoor heat exchangers are opposite. The heat exchange effect between the liquid and the refrigerant can be improved through countercurrent flow heat exchange, and the refrigeration effect of the air conditioning system is further improved.

The invention provides a counter-flow type evaporative cooling tower and a heat exchange method. The counter-flow type evaporative cooling tower comprises a closed tower body, an induced draft fan, a heat exchange tube bundle, a spraying device and a spraying cooling device. The closed tower body is sequentially provided with a first air inlet end, a cooling area, an air mixing area, a heat exchange area and a second air inlet end from one side to the other side, an air outlet end is arranged at the position, corresponding to the air mixing area, of the closed tower body, a water storage area is formed below the cooling area, the air mixing area and the heat exchange area in the closed tower body, and the induced draft fan is arranged at the air outlet end; the heat exchange tube bundle is arranged in the heat exchange area in the vertical direction, a circulating water inlet is formed in the lower end of the heat exchange tube bundle, and a circulating water outlet is formed in the upper end of the heat exchange tube bundle. The spraying device is arranged between the heat exchange tube bundle and the water storage area; and the spraying cooling device is arranged in the cooling area. The water-water heat exchanger has the advantages that external circulating water is sprayed to the outer surface of the heat exchange tube bundle through the spraying device, and internal circulating water and the external circulating water are in a reverse flow type, so that the water-water heat exchange efficiency can be greatly improved.

The invention provides a reverse flow type fog dissipation peak wet air cooler which comprises a box body, an evaporation coil pipe and a peak device are arranged in the box body, and the evaporation coil pipe and the peak device are arranged in a mutually isolated mode through a flow dividing partition plate arranged in the box body; a rhombic fog dissipation filler is arranged above the inner cavity of the box body, and a hot air channel of the rhombic fog dissipation filler is communicated with a cavity where the evaporation coil is located; a cold air channel of the rhombic fog dissipation filler is communicated with the cavity where the peak device is located, and the cold air channel is not communicated with or partially communicated with the cavity where the evaporation coil is located; through the synergistic effect of the counter-flow peak device and the evaporation coil, the heat exchange efficiency is remarkably improved in the high-temperature or load peak period, stable operation of the system is guaranteed, efficiency reduction caused by insufficient cooling is avoided, the rhombic fog dispersal filler and multi-channel airflow mixing design is adopted, wet and hot air and cold air are fully mixed for cooling, the relative humidity is reduced, and the energy consumption is reduced. Generation of rime fog is effectively inhibited, and environmental pollution and visual potential safety hazards are reduced.

The invention belongs to the technical field of heat pump energy storage, and discloses an integrated absorption heat storage CO2 heat pump energy storage system and an operation method thereof.The integrated absorption heat storage CO2 heat pump energy storage system comprises a CO2 heat pump cycle, an absorption heat storage cycle and a heating water flow water.The absorption heat storage cycle comprises an absorbent storage tank (1), a refrigerant storage tank (2) and a finned tube heat exchanger (9); the CO2 heat pump cycle is a loop formed by connecting components including an absorbent storage tank (1), a first countercurrent heat exchanger (4), a second countercurrent heat exchanger (5), an expansion valve (6), an evaporator (7) and a compressor (8); and the heating water flow path is a flow path formed by connecting the first countercurrent heat exchanger (4) and the second countercurrent heat exchanger (5) with the hot water storage tank (3). Compared with the prior art, the problems of insufficient heat energy utilization and low heat storage efficiency of the CO2 heat pump can be solved.

The invention discloses a full-flow-channel zero-bypass concentric sleeve reverse flow type heat exchanger, and belongs to the technical field of heat exchange equipment. According to the heat exchanger, the fluid bypass problem existing in a tubular heat exchanger is fundamentally eliminated, fluid participating in heat exchange completely flows in the closed pipeline in the pure axial direction, two-strand or multi-strand pure countercurrent flow heat exchange can be achieved through reasonable process arrangement, the logarithmic average temperature difference correction coefficient approaches to 1, design is easy and convenient, and calculation is accurate and reliable. The heat exchanger integrates the advantages of a traditional tubular heat exchanger, a plate-fin heat exchanger, a lamella heat exchanger, a plate-type heat exchanger and a double-pipe heat exchanger, overcomes the defects of the traditional tubular heat exchanger, the plate-fin heat exchanger, the lamella heat exchanger, the plate-type heat exchanger and the double-pipe heat exchanger, is suitable for heat exchange of various media and complex working conditions, and can realize micro-channel and large-scale.

The application discloses a kind of wind energy air water taking device, mainly including power and flexible transmission module, compression and precooling gas storage module, condensation water taking module, collection and depth purification module and independent energy storage control unit.The core is to use high-pressure proportional shunt valve to divide high-pressure wet air into two ways: one way is expanded through vortex tube to produce extremely cold gas and is introduced into sleeve type counterflow heat exchanger outer tube;The other way is kept in high-pressure state into heat exchanger inner tube, and a large amount of condensed water is condensed and separated instantaneously under the countercurrent quenching of cold gas, which fundamentally eliminates the ice blockage hidden trouble caused by direct pressure reduction;In addition, the system realizes wind power self-adaptive no-load starting through centrifugal clutch and unloading valve linkage, and uses coaxial microgenerator to provide closed-loop power for water quality ultraviolet sterilization component;The application does not need external power grid support, and can efficiently and stably produce safe direct drinking water in extreme environment.

The invention discloses a low-backpressure vacuumizing optimization structure and method for a high-countercurrent-ratio NDACC system, and relates to the energy-saving technology of air cooling systems, and the low-backpressure vacuumizing optimization structure and method for the high-countercurrent-ratio NDACC system are characterized in that the low-backpressure vacuumizing optimization structure comprises a cooling unit, a vacuumizing pipeline system and a vacuum pump set; each cooling unit comprises a plurality of cooling triangles, at least one cooling triangle in each cooling unit is set as a countercurrent area, the other cooling triangles are set as downstream areas, the number ratio of the cooling triangles in the downstream areas to the cooling triangles in the countercurrent areas is not smaller than 2: 1 and not larger than 4: 1, and the downstream areas and the countercurrent areas are provided with electric shutters respectively; the tops of the cooling triangles of the downstream area are communicated with one another through a first pipeline, the bottoms of the cooling triangles of the downstream area are communicated with the bottoms of the cooling triangles of the countercurrent area through a second pipeline, the countercurrent area of each cooling unit is provided with a vacuumizing connector, and the vacuumizing connectors are connected to a vacuum pump set through a vacuumizing pipeline system. The exhaust efficiency of non-condensable steam under the low-back-pressure working condition is effectively improved, and the operation back pressure and freezing risk are reduced.

The application relates to the field of heat exchangers, in particular to a pure counterflow heat exchanger for tube and shell processes, which comprises a front-end tube box, a tube process inlet is fixedly communicated with the outer wall of the top end of the front-end tube box; a fixed tube plate is fixedly communicated with the right end of the front-end tube box; a shell process cylinder is fixedly communicated with the right end of the fixed tube plate, a shell process inlet is fixedly communicated with the top of the right end of the shell process cylinder, a shell process outlet is fixedly communicated with the bottom of the left end of the shell process cylinder; a rear-end tube box is fixedly communicated with the right end of the shell process cylinder; the tube process inlet is arranged at the left end and the tube process outlet is arranged at the right end, so that the same fixed tube plate is prevented from being simultaneously contacted with the inlet medium and the outlet medium and from having an excessively large temperature difference, the heat exchange effect is improved, an expansion joint is further arranged, the tube bundle can freely stretch and shrink along the axial direction, and the axial stress between the tube process and the shell process is reduced.

The invention discloses a heat exchange sheet manufacturing method, a heat exchange sheet and a reverse flow type heat exchanger, the heat exchange sheet manufacturing method comprises a metal plate pretreatment process, a metal net manufacturing process, a compounding process, a cutting process and an injection molding process, through the metal plate pretreatment process, dense copper columns can be formed on the surface of a metal plate; therefore, the composite contact area of the metal net and the moisture-permeable film is increased, the binding force between the metal net and the moisture-permeable film is increased, the metal net and the moisture-permeable film are not prone to being separated, and the reliability of the heat exchange piece during application is improved.

The application firstly provides a shell-and-tube heat exchanger based on M cycle, which comprises a heat insulation shell, a plurality of coaxial heat conducting cylinders are arranged in the heat insulation shell, the heat conducting cylinder comprises an inner cylinder and an outer cylinder which are coaxially arranged and have open ends, a gap is arranged between the inner cylinder and the outer cylinder, a gap is arranged between adjacent heat conducting cylinders, the gap between the inner cylinder and the outer cylinder of each heat conducting cylinder forms a dry channel, the gap between adjacent two heat conducting cylinders forms a wet channel, a flow dividing area is arranged at one end of the dry channel outlet in the heat insulation shell, and a water film is arranged on the outer cylinder at one side of the wet channel. The countercurrent refrigeration channels between different layers can absorb heat and promote the refrigeration process during work, the refrigeration effect is enhanced, the cooling range is large, the M cycle principle refrigeration is realized by a more compact tubular mechanism, and larger refrigeration capacity can be obtained under unit volume. The application further provides an air conditioner.

The present invention discloses a counter-flow cooling tower, comprising a tower body, a heat exchange tube arranged in the tower body, a water cooling component and an air cooling component. A water storage tank located below an air inlet is arranged on the tower body, and the water cooling component comprises a water pump, the water inlet of the water pump is connected with the water storage tank, and the water outlet is connected with the water storage tank through a heat absorption channel and a heat dissipation channel in sequence, the heat absorption channel is arranged just above the heat exchange tube, and the heat dissipation channel is arranged outside the tower body. The counter-flow cooling tower has a reasonable structure, guides the cooling water flow path through the heat absorption channel, improves the cooling water utilization rate, reduces the number of cooling water circulation flows, prevents the cooling water from exchanging heat with the air entering the tower body from the outside, and uses the heat dissipation channel to release the heat absorbed by the cooling water to the outside, thereby increasing the heat exchange amount and improving the cooling efficiency, thereby reducing the equipment operation time and achieving energy saving.

The utility model discloses a double-flow arrangement structure of a horizontal waste incineration waste heat boiler economizer. The double-flow arrangement structure of the economizer comprises an economizer inlet collecting box, an economizer outlet collecting box, an economizer middle collecting box, an economizer coiled pipe set, a downstream connecting pipe and a countercurrent connecting pipe. The utility model solves the problems of poor heat exchange effect and high exhaust gas temperature caused by lower flow velocity of the working medium of the economizer, and changes the flow direction of the working medium of the economizer by adding the header blocking plate, the downstream connecting pipe and the countercurrent connecting pipe, so that the circulation sectional area of the economizer is reduced by half, and the flow velocity of the working medium is doubled. The heat absorption effect of the coal economizer is improved and the smoke exhaust temperature is reduced due to proper high working medium flow speed. And the service life of the economizer is prolonged, and the economic benefit of boiler operation is also improved.

The utility model discloses a reverse flow type multi-stage heat exchange system which comprises a first-stage heat exchange unit, a second-stage heat exchange unit and a third-stage heat exchange unit, and medium inlets and outlets and heat exchange inlets and outlets of the three heat exchange units are respectively communicated. A first-stage heat exchange inlet is formed in the first-stage heat exchange unit and is connected with the first-stage heat exchange unit through a conical diffuser and a honeycomb guide plate; a second-stage heat exchange inlet is formed in the second-stage heat exchange unit, and the second-stage heat exchange inlet is connected with the second-stage heat exchange unit through a Venturi nozzle; a plurality of first-stage heat exchange pipes are arranged in the first-stage heat exchange unit and are corrugated pipes, a plurality of second-stage heat exchange pipes are arranged in the second-stage heat exchange unit and are spiral fluted pipes, and a plurality of third-stage heat exchange pipes are arranged in the third-stage heat exchange unit and are finned pipes. Cold fluid and hot fluid are arranged in a cross countercurrent mode, the device is efficient, flexible, high in adaptability, simple in structure, convenient to maintain, low in cost and capable of achieving low-temperature waste heat recovery, and comprehensive energy efficiency is greatly improved.

This invention discloses a high-pressure resistant rectangular plate-shell heat exchanger, relating to the field of heat exchange and heat recovery technology. It includes a front tube box, tube sheet, shell, plate bundle, rear tube box, and saddle. The plate bundle is composed of multiple stacked and welded plates, installed inside the shell, with both ends connected to the tube sheet. The tube sheet is welded to both ends of the shell and connected to the front and rear tube boxes by bolts. The rear tube box has a plate-side inlet, the front tube box has a plate-side outlet, and the shell has a shell-side inlet and outlet. The two fluid media flow in pure counter-current within the plate bundle. The plate-shell heat exchanger of this invention has advantages such as high heat transfer efficiency, small end temperature difference, low pressure drop, compact structure, light weight, ease of large-scale production, high pressure resistance and high temperature resistance, good sealing performance, and safety and reliability.

The application relates to a container type counter-flow closed cooling tower system and belongs to the technical field of cooling equipment. The system comprises a container box body, shallow layer water tanks are arranged in the box body from bottom to top, a multistage guide plate assembly, filler, heat exchange pipe bundles, a spraying system, a water collector and a fan assembly are arranged in the box body. The integrated shallow layer water tank is provided with a water collecting hopper formed by an inclined bottom plate and a submersible pump, low water level emptying prevention is realized, the pipe box type heat exchange pipe bundle realizes medium reversing through a built-in return cavity in the pipe box, external U-shaped elbows are omitted, the pipe row spacing is reduced, the unit volume heat exchange area is improved, the guide plate assembly considers water splash prevention and uniform air inlet, the spraying system adopts a dense nozzle array and a primary-secondary pipe structure, uniform spraying in a short spraying distance is ensured, and the fan adopts a draft tube-free EC axial flow fan, installation space is saved. The application can realize efficient and stable cooling in the limited height of a standard container, has the characteristics of high integration, good cooling effect and reliable operation, and is suitable for various temporary cooling scenes.