CN112710166A

CN112710166A - Evaporation type condenser

Info

Publication number: CN112710166A
Application number: CN202110080745.3A
Authority: CN
Inventors: 欧阳健安; 吴晏
Original assignee: Weidu Green Technology Guangzhou Co ltd
Current assignee: Weidu Green Technology Guangzhou Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-04-27

Abstract

The invention provides an evaporative condenser, which comprises a shell, a heat exchange tube, a water pump spraying device, a water receiving disc and an exhaust fan, wherein the shell is provided with a heat source inlet and a cooling liquid outlet; the heat exchange tube is arranged in the shell, the inlet end of the heat exchange tube is communicated with the heat source inlet, and the outlet end of the heat exchange tube is communicated with the cooling liquid outlet; the water pump spraying device is used for spraying cooling water onto the heat exchange tube; the water receiving tray is arranged at the bottom of the shell, is communicated with the water pump spraying device and is used for receiving cooling water; the exhaust fan is arranged at the top of the shell and enables the inner cavity of the shell to form ascending airflow from bottom to top; wherein, a plurality of atomizer are equipped with around the water collector, and atomizer is used for atomizing water, makes the water after the atomizing along with updraft ventilator to the lower surface of heat exchange tube adheres to. According to the evaporative condenser provided by the invention, the atomization nozzle is additionally arranged, so that air enters the shell and then is mixed with water mist to form a gas-liquid mixture, thereby reducing dry spots on the surface of the heat exchange tube, reducing scaling and improving the heat exchange efficiency.

Description

Evaporation type condenser

Technical Field

The invention relates to the technical field of condensing equipment, in particular to an evaporative condenser.

Background

The evaporative condenser is a device which takes water and air as cooling media and takes away heat by using partial water evaporation.

When the existing evaporative condenser works, cooling water is sprayed on the heat exchange tubes through a water pump, so that the water is uniformly distributed on the outer surfaces of the heat exchange tubes from top to bottom to form water films; then, the fan is used for air draft or blowing, so that outside air flows through the outer surface of the heat exchange tube, and part of water on the heat exchange tube is evaporated to take away heat in the tube. However, when the existing condenser sprays the heat exchange tube by a water pump, water on the outer surface of the heat exchange tube is difficult to completely wrap the heat exchange tube, so that dry spot scaling is easily formed on the outer surface of the heat exchange tube in a place with less water, and the heat exchange efficiency is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an evaporative condenser which is high in heat exchange efficiency and can prevent scaling.

In order to solve the technical problems, the invention adopts the following technical scheme:

an evaporative condenser comprises a shell, a heat exchange tube, a water pump spray device, a water pan and an exhaust fan, wherein the shell is provided with a heat source inlet and a cooling liquid outlet; the heat exchange tube is arranged in the shell, the inlet end of the heat exchange tube is communicated with the heat source inlet, the outlet end of the heat exchange tube is communicated with the cooling liquid outlet, and the heat exchange tube is used for liquefying and cooling the heat source; the water pump spraying device is used for spraying cooling water onto the heat exchange tube; the water receiving tray is arranged at the bottom of the shell, is communicated with the water pump spraying device and is used for receiving cooling water; the exhaust fan is arranged at the top of the shell, so that ascending airflow from bottom to top is formed in the inner cavity of the shell, namely air is sucked from the bottom of the shell and is exhausted from the top of the shell; the water receiving tray is provided with a plurality of atomizing nozzles at the periphery, the atomizing nozzles are used for atomizing water, so that the atomized water is mixed with air entering from the bottom of the shell to form a gas-liquid mixture and is attached to the lower surface of the heat exchange tube along with ascending air flow.

Compared with the prior art, the evaporative condenser provided by the invention has the advantages that the atomization nozzle is additionally arranged, so that air enters the shell and then is mixed with water mist to form a gas-liquid mixture, atomized water drops are adhered to the lower surface of the heat exchange tube along with wind, dry spots on the surface of the heat exchange tube are reduced, heat transfer is enhanced, scaling is reduced, and the heat exchange efficiency of equipment is improved.

Preferably, the heat exchange tube includes condenser pipe and cooling tube, the cooling tube upside is located to the condenser pipe, and the play water end of condenser pipe and the end intercommunication of intaking of cooling tube, and the heat source carries out exothermic liquefaction after passing through the condenser pipe, then flows from the coolant liquid export after further cooling in liquid flows to the cooling tube from the condenser pipe and flows out, through the secondary cooling, ensures the cooling effect of heat source.

Preferably, the evaporative condenser further comprises a finned tube, the finned tube is arranged in the shell and located between the heat exchange tube and the exhaust fan, the inlet end of the finned tube is communicated with the heat source inlet, the outlet end of the finned tube is communicated with the inlet end of the condensing tube, the heat source firstly passes through the finned tube, exhaust gas is heated and warmed under the action of the exhaust fan, exhaust relative humidity is reduced, white smoke is eliminated, and accordingly smoke-free emission is achieved.

Preferably, the water pump spraying device comprises a water pump, a circulating water pipe and a plurality of water distribution nozzles, the water pump is respectively communicated with the water receiving tray and the water distribution nozzles through the circulating water pipe, the water distribution nozzles are arranged above the heat exchange pipe, a certain amount of water is added into the water receiving tray during operation, the water pump pumps water from the water receiving tray through the circulating water pipe and sends the water to the plurality of water distribution nozzles, the water is uniformly sprayed on the heat exchange pipe through the water distribution nozzles, and cooling water flows back to the water receiving tray downwards under the action of weight to realize circular extraction.

Preferably, a ball float valve is arranged on the water receiving tray and used for maintaining the water in the water receiving tray at a constant water level, the water enters the water receiving tray through the ball float valve, and when the water reaches a certain water level, the ball float valve is closed.

Preferably, the evaporative condenser further comprises a defoaming layer, the defoaming layer is arranged in the shell, is positioned between the finned tube and the heat exchange tube and is used for removing water drops, and the water drops adsorbed by the defoaming layer drop downwards under the gravity after reaching a certain weight and finally flow into the water receiving tray.

Preferably, the condensation pipe, the cooling pipe and the finned tube are provided with a plurality of pipes, and two ends of the condensation pipe, the cooling pipe and the finned tube are welded on two sides of the shell, so that the shell is more firm and durable; the side part of the shell is provided with a heat source distribution chamber corresponding to the inlet ends of the finned tubes, the heat source inlet is arranged on the heat source distribution chamber, and heat sources are uniformly distributed into the finned tubes through the heat source distribution chamber; the side part of the shell is provided with a first diversion chamber corresponding to the outlet end of the finned tube and the inlet end of the condensing tube, and a heat source enters the upper part of the first diversion chamber from the outlet end of the finned tube and is uniformly distributed into the condensing tubes from the lower part of the first diversion chamber; a second diversion chamber is arranged on the side part of the shell corresponding to the outlet end of the condensation pipe and the inlet end of the cooling pipe, and a heat source enters the upper part of the second diversion chamber from the outlet end of the condensation pipe and is uniformly distributed into the plurality of cooling pipes from the lower part of the second diversion chamber; and a cooling liquid collecting chamber is arranged on the side part of the shell corresponding to the outlet end of the cooling pipe, a cooling liquid outlet is arranged on the cooling liquid collecting chamber, and the cooling liquid enters the cooling liquid collecting chamber from the outlet end of the cooling pipe to be collected and is discharged from the cooling liquid outlet together.

Preferably, the condenser pipe is the tubulation structure, because current condenser pipe generally adopts the coil pipe structure, its tube bank is not well completely fixed, and the operation process vibration produces great noise, and the condenser pipe adopts the tubulation structure to replace the coil pipe structure, and its pipe both ends welding is on the orifice plate, and is even, firm, vibrates for a short time.

Preferably, the cooling pipe is of a coil structure, so that the structure is compact and the flow resistance is low.

Preferably, the plurality of condensation pipes and the plurality of finned pipes are arranged in a delta shape, so that the turbulence degree of air flowing through the surface of the pipeline is increased, and heat transfer is enhanced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a simple cross-sectional view of the present invention;

fig. 3 is a schematic view of the structure of the cooling pipe.

Description of reference numerals: the device comprises a shell 1, a heat exchange pipe 2, a water pump spraying device 3, a water receiving tray 4, an exhaust fan 5, an atomizing nozzle 6, a finned pipe 7, a defoaming layer 8, a heat source inlet 11, a cooling liquid outlet 12, a heat source distribution chamber 13, a first diversion chamber 14, a second diversion chamber 15, a cooling liquid collection chamber 16, an exhaust collection chamber 17, an exhaust port 18, a baffle 101, an orifice plate 102, a condenser pipe 21, a cooling pipe 22, a water pump 31, a circulating water pipe 32, a water distribution nozzle 33 and a ball float valve 34.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1 to 3, an evaporative condenser comprises a shell 1, a heat exchange tube 2, a water pump spray device 3, a water pan 4 and an exhaust fan 5, wherein the shell 1 is provided with a heat source inlet 11 and a cooling liquid outlet 12; the heat exchange tube 2 is arranged in the shell 1, the inlet end of the heat exchange tube is communicated with the heat source inlet 11, the outlet end of the heat exchange tube is communicated with the cooling liquid outlet 12, and the heat exchange tube 2 is used for liquefying and cooling the heat source; the water pump spraying device 3 is used for spraying cooling water onto the heat exchange tube 2; the water pan 4 is arranged at the bottom of the shell 1, is communicated with the water pump spraying device 3 and is used for receiving cooling water; the exhaust fan 5 is arranged at the top of the shell 1, so that ascending airflow from bottom to top is formed in the inner cavity of the shell 1, namely air is sucked from the bottom of the shell 1 and is exhausted from the top of the shell 1; wherein, water collector 4 is equipped with a plurality of atomizer 6 all around, atomizer 6 and outside water source intercommunication, it is used for atomizing water, and the air mixture that makes the water after the atomizing get into from casing 1 bottom forms the gas-liquid mixture to along with updraft to the lower surface of heat exchange tube 2 adheres to. In this embodiment, the atomizer 6 is connected to an external water source, preferably tap water.

Compared with the prior art, the evaporative condenser provided by the invention has the advantages that the atomizing nozzle 6 is additionally arranged, so that air enters the shell 1 and then is mixed with water mist to form a gas-liquid mixture, atomized water drops are adhered to the lower surface of the heat exchange tube 2 along with wind, dry spots on the surface of the heat exchange tube 2 are reduced, heat transfer is enhanced, scaling is reduced, and the heat exchange efficiency of equipment is improved.

Referring to fig. 1 and 2, in a preferred embodiment, the heat exchange tube 2 includes a condensation tube 21 and a cooling tube 22, the condensation tube 21 is disposed on the upper side of the cooling tube 22, a water outlet end of the condensation tube 21 is communicated with a water inlet end of the cooling tube 22, a heat source is subjected to heat release liquefaction after passing through the condensation tube 21, then liquid flows into the cooling tube 22 from the condensation tube 21 and further cools, and then flows out from the cooling liquid outlet 12, and the cooling effect of the heat source is ensured through secondary cooling.

Referring to fig. 1 and 2, in a preferred embodiment, the evaporative condenser further includes a finned tube 7, the finned tube 7 is disposed in the casing 1 and located between the condensing tube 21 and the exhaust fan 5, an inlet end of the finned tube 7 is communicated with the heat source inlet 11, and an outlet end of the finned tube is communicated with an inlet end of the condensing tube 21, so that the heat source firstly passes through the finned tube 7, and under the action of the exhaust fan 5, the exhaust gas is heated and heated, the relative humidity of the exhaust gas is reduced, the white smoke phenomenon is eliminated, and accordingly, the smokeless emission is achieved.

Referring to fig. 1 and 2, in a preferred embodiment, the water pump spraying device 3 includes a water pump 31, a circulating water pipe 32 and a plurality of water distribution nozzles 33, the water pump 31 is respectively communicated with a water pan 4 and the water distribution nozzles 33 through the circulating water pipe 32, the water distribution nozzles 33 are disposed above the heat exchange pipe 2, when the water pump operates, a certain amount of water is added into the water pan 4, wherein a ball float valve 34 is disposed on the water pan 4 and used for maintaining the water in the water pan 4 at a constant water level, the water enters the water pan 4 through the ball float valve 34, when the water in the water pan 4 reaches a certain water level, the ball float valve 34 closes the water pump 31 to pump water from the water pan 4 through the circulating water pipe 32 and send the water to the plurality of water distribution nozzles 33, the water is uniformly sprayed on the heat exchange pipe 2 through the water distribution nozzles 33, and the cooling water flows back to the water pan 4 under the action of weight.

Referring to fig. 1 and 2, in a preferred embodiment, the evaporative condenser further comprises a defoaming layer 8, the defoaming layer 8 is arranged in the shell 1 and between the finned tube 7 and the condensing tube 21 and is used for removing water drops, and the water drops adsorbed by the defoaming layer 8 drop downwards under the gravity after reaching a certain weight and finally flow into the water pan 4. In this embodiment, the water distribution nozzle 33 is disposed between the defoaming layer 8 and the condensation pipe 21. The defoaming layer 8 is made of plastic or metal defoaming net.

Referring to fig. 1 and 2, in a preferred embodiment, the condensation pipes 21, the cooling pipes 22 and the finned tubes 7 are provided with a plurality of strips, wherein the shell 1 comprises baffles 101 at the front end and the rear end and pore plates 102 at two sides, and the condensation pipes 21, the cooling pipes 22 and the finned tubes 7 are welded at two ends on the pore plates 102 at two sides of the shell 1, so that the shell is more reliable and durable.

Specifically, a heat source distribution chamber 13 is arranged on the side of the shell 1 corresponding to the inlet end of the finned tubes 7, the heat source inlet 11 is arranged on the heat source distribution chamber 13, and heat sources are uniformly distributed to the finned tubes 7 through the heat source distribution chamber 13; the side part of the shell 1 corresponding to the outlet end of the finned tube 7 and the inlet end of the condenser tube 21 is provided with a first diversion chamber 14, the side part of the shell 1 corresponding to the outlet end of the condenser tube 21 and the inlet end of the cooling tube 22 is provided with a second diversion chamber 15, the finned tube 7, the condenser tube 21 and the cooling tube 22 are arranged from top to bottom and are communicated with each other through the first diversion chamber 14 and the second diversion chamber 15 in sequence; namely, the heat source enters the upper part of the first diversion chamber 14 from the outlet end of the finned tube 7 and is uniformly distributed into a plurality of condensation pipes 21 from the lower part of the first diversion chamber 14, and then the heat source enters the upper part of the second diversion chamber 15 from the outlet end of the condensation pipes 21 and is uniformly distributed into a plurality of cooling pipes 22 from the lower part of the second diversion chamber 15; the side of the shell 1 is provided with a cooling liquid collecting chamber 16 corresponding to the outlet end of the cooling pipe 22, the cooling liquid outlet 12 is arranged on the cooling liquid collecting chamber 16, and the cooling liquid enters the cooling liquid collecting chamber 16 from the outlet end of the cooling pipe 22 to be collected and is discharged from the cooling liquid outlet 12 together.

In this embodiment, an exhaust collecting chamber 17 is disposed on the upper side of the casing 1, an exhaust outlet 18 is disposed at an outlet of the collecting chamber, the exhaust fan 5 is disposed at the exhaust outlet 18, four support seats (not shown) are disposed on the water pan 4, the bottom of the casing 1 is disposed on the support seats, a gap is formed between the highest water level of the water pan 4 and the bottom of the casing 1, and air enters the casing 1 through the gap.

Referring to fig. 3, in a preferred embodiment, the condensation pipe 21 is of a tubular structure, since the existing condensation pipe 21 generally adopts a coil structure, the pipe bundle is not perfectly fixed, and vibration during operation generates large noise, the condensation pipe 21 adopts a tubular structure instead of the coil structure, and two ends of the pipe are welded on the orifice plate 102, so that the condensation pipe is uniform, firm and small in vibration; the cooling pipe 22 is of a coil pipe structure, so that the structure is compact, the flow resistance is small, the plurality of condensing pipes 21 and the plurality of finned pipes 7 are arranged in a delta shape, the turbulence degree of air flowing through the surface of the pipeline is increased, and the heat transfer is enhanced.

The working principle of the present invention is explained below with reference to fig. 1 to 3:

first, a certain amount of water is poured into the drip pan 4 through the water replenishing valve, and the drip pan 4 is maintained at a constant water level. The water pump 31 and the exhaust fan 5 are started.

The heat source needing to be condensed and cooled enters the shell 1 from the heat source inlet 11, the heat source enters the finned tubes 7 through the heat source distribution chamber 13, part of the heat source after the heat source flows through the finned tubes 7 is subjected to heat release liquefaction and flows into the upper part of the first diversion chamber 14, the heat source is distributed to the condenser tubes 21 from the lower part of the first diversion chamber 14, cooling water is sprayed onto the condenser tubes 21 through the water distribution spray head 33, the heat source is subjected to heat release liquefaction after flowing through the condenser tubes 21, all liquid flows out of the condenser tubes 21 and enters the upper part of the second diversion chamber 15, then is distributed to the cooling tubes 22 from the lower part of the second diversion chamber 15, the cooling water on the surfaces of the condenser tubes 21 flows downwards under the action of gravity and is distributed onto the surfaces of the cooling tubes 22, and the liquefied heat source further reduces the temperature in the cooling tubes 22 and then flows into the cooling liquid outlet.

Exhaust fan 5 is from down up exhausting, and the air gets into in the casing 1 from water collector 4 all around, and atomizer 6 has been arranged around water collector 4, and atomizer 6 external running water, and atomizer 6 atomizes the running water into tiny drop of water during operation, forms vapour-liquid mixture with the air mixture that gets into from water collector 4. The vapor-liquid mixture flows through the cooling pipe 22 and the condensing pipe 21 from bottom to top in sequence, water drops in the vapor-liquid mixture are adhered to the lower surfaces of the cooling pipe 22 and the condensing pipe 21, dry spots on the surfaces of the cooling pipe 22 and the condensing pipe 21 can be reduced, heat transfer is enhanced, scaling is reduced, and therefore heat exchange efficiency of the device is improved.

When air in the vapor-liquid mixture flows through the cooling pipe 22 and the condensing pipe 21, partial moisture on the surfaces of the cooling pipe 22 and the condensing pipe 21 is evaporated, so that heat is taken away, liquid flowing through the cooling pipe 22 is cooled, and condensable gas flowing through the condensing pipe 21 is condensed into liquid. The air on the surface of the cooling pipe 22 and the condensing pipe 21 becomes damp and hot and has water drops in a certain proportion, the water drops enter the defoaming layer 8, and the defoaming layer 8 can effectively remove the water drops in the damp and hot air. In addition, the water drops caught by the defoaming layer 8 drop downward under gravity after reaching a certain weight, and finally fall into the water receiving tray 4 through the condensation pipe 21 and the cooling pipe 22. The hot and humid air passing through the defoaming layer 8 and having water droplets removed therefrom contacts the fin tubes 7, the air temperature rises, the relative humidity decreases, and the air is discharged from the exhaust port 18 to the outside through the exhaust fan 5 after entering the exhaust gas collecting chamber 17 upward.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. An evaporative condenser comprising:

The shell is provided with a heat source inlet and a cooling liquid outlet;

The heat exchange tube is arranged in the shell, the inlet end of which is connected with the heat source inlet, and the outlet end is communicated with the cooling liquid outlet, and the heat exchange tube is used for liquefaction cooling of the heat source;

A water pump spray device, which is used to spray cooling water onto the heat exchange tubes;

a water receiving tray, which is arranged at the bottom of the shell and communicated with the water pump spray device, which is used for receiving cooling water;

The exhaust fan is located on the top of the shell, so that the inner cavity of the shell forms an upward airflow from the bottom to the top;

It is characterized in that a plurality of atomizing nozzles are arranged around the water receiving tray, and the atomizing nozzles are used to atomize the water, so that the atomized water is attached to the lower surface of the heat exchange tube with the rising air flow.

2. The evaporative condenser according to claim 1, wherein the heat exchange pipe comprises a condenser pipe and a cooling pipe, the condenser pipe is arranged on the upper side of the cooling pipe, and the water outlet end of the condenser pipe is connected to the cooling pipe. The water inlet is connected.

3. The evaporative condenser according to claim 2, characterized in that the evaporative condenser further comprises finned tubes, the finned tubes are arranged in the casing and between the heat exchange tubes and the exhaust fan, and the finned tubes are arranged in the casing. The inlet end of the tube communicates with the heat source inlet, and the outlet end communicates with the inlet end of the condenser tube.

4. The evaporative condenser according to claim 1, wherein the water pump spray device comprises a water pump, a circulating water pipe and several water distribution nozzles, and the water pump communicates with the water receiving tray and the water distribution nozzle respectively through the circulating water pipe, The water distribution nozzle is arranged above the heat exchange tube.

5 . The evaporative condenser according to claim 4 , wherein a floating ball valve is provided on the water receiving tray, which is used to maintain the water in the water receiving tray at a constant water level. 6 .

6 . The evaporative condenser according to claim 3 , wherein the evaporative condenser further comprises a defoaming layer, and the defoaming layer is arranged in the casing and is located between the finned tubes and the heat exchange tubes, and the evaporative condensers are 5 . Used to remove water droplets.

7. The evaporative condenser according to claim 3, characterized in that, the condenser tube, the cooling tube and the finned tube are all provided with several, and both ends of the condenser tube, the cooling tube and the finned tube are welded to the shell On both sides, the side of the casing is provided with a heat source distribution chamber corresponding to the inlet end of the fin tube, the heat source inlet is arranged on the heat source distribution chamber, and the side of the casing is provided with a first guide tube corresponding to the outlet end of the fin tube and the inlet end of the condenser tube. The flow chamber, the side of the casing is provided with a second guide chamber corresponding to the outlet end of the condenser pipe and the inlet end of the cooling pipe, and the side of the casing is provided with a cooling liquid collection chamber corresponding to the outlet end of the cooling pipe, and the cooling liquid outlet is provided in the cooling liquid on the collection room.

8 . The evaporative condenser according to claim 7 , wherein the condenser tube is of a tube-and-tube structure. 9 .

9 . The evaporative condenser according to claim 7 , wherein the cooling pipe has a coil structure. 10 .

10 . The evaporative condenser according to claim 7 , wherein the plurality of condenser tubes and the plurality of finned tubes are arranged in a fringe shape. 11 .