CN211060693U - Cocurrent and countercurrent cooling tower - Google Patents

Abstract

The application discloses a forward and reverse flow cooling tower, which comprises a motor, a speed reducer, a fan, an air duct, a multi-dimensional water collector, a jet flow water distribution system, a honeycomb rectifier, a wall flow prevention plate, an air inlet, an air deflector and a water collecting tank; the motor, the speed reducer, the fan and the air duct are positioned on the top of the tower; the multidimensional water collector is positioned below the tower top; the jet flow water distribution system is positioned at the middle lower part of the tower; the spiral case type ejectors are uniformly distributed in the jet water distribution system; a forward-reverse flow operation space combining jet water drops and unsaturated air is formed between the multidimensional water collector and the jet water distribution system; the utility model has the advantages that: the core part of the counter-flow type filler cooling tower is improved into a forward-flow and counter-flow cooling mode, the filler, a counter-flow spraying device and a common dehydrator are removed, the cooling mode of the tower is optimized, and the water floating rate of the dehydrator is reduced; the cooling efficiency can be improved under the same working condition, the cooling efficiency is stable, the maintenance is low, the energy is saved, the environment is protected, and the cooling tower is suitable for large, medium and small cooling towers.

Description

Cocurrent and countercurrent cooling tower

Technical Field

The utility model relates to a cooling tower technical field especially relates to a direct current and countercurrent flow cooling tower.

Background

In the market of cooling towers at home and abroad in the last hundred years, the traditional counter-flow type filler cooling tower is widely applied, and the filler cooling tower with various structural forms appears, however, from the development and use of recent decades, all the counter-flow type filler cooling tower has the defects that the cooling efficiency is difficult to maintain and improve, and the filler is easy to scale, the resistance is large, the cooling efficiency is obviously reduced after the scale is formed, and the operation and maintenance cost is high.

In recent years, through the practice of improving a filler cooling tower into a jet flow cooling tower, the product is improved to a certain extent in actual operation, energy conservation and maintenance are ensured, but an ideal effect is not achieved, the main reason is that fine water drops ejected by a jet flow water distribution system generate vortex under the ventilation effect of a mechanical fan, the ascending small water drops are gathered into large water drops, the water drops fall quickly under the action of gravity and cannot be distributed uniformly, the contact time with air is short, and the improvement of cold efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cistron and countercurrent flow cooling tower solves one or more among the above-mentioned prior art problem.

According to one aspect of the utility model, a forward and backward flow cooling tower is provided, which comprises a motor, a reducer, a fan, an air duct, a multidimensional water collector, a jet flow water distribution system, a honeycomb rectifier, a wall flow prevention plate, a guide plate, an air inlet and a water collecting tank; the motor, the speed reducer, the fan and the air duct are positioned on the top of the tower; the multidimensional water collector is positioned below the tower top platform; the multidimensional water collector is fixed on a water collector frame; the jet flow water distribution system is positioned at the middle lower part of the tower; the jet flow water distribution system comprises a water distribution main pipe, a branch pipe and a volute type jet device; the volute type ejectors are uniformly distributed in the jet water distribution system along the branch pipe; a forward and reverse flow operation space combining jet water drops and unsaturated air is formed between the multidimensional water collector and the jet water distribution system; a honeycomb rectifier is arranged below the jet flow water distribution system; the honeycomb rectifier is fixed on the honeycomb rectifier frame; the anti-wall flow plate is positioned below the honeycomb rectifier frame; the bottom of the tower is provided with a water collecting tank; an air deflector is arranged at the vertical position in the middle of the tower, facing the air inlet, below the honeycomb rectifier frame and above the water collecting tank; the anti-wall flow plate comprises a connecting plate, a first water outlet plate, a first inclined plate, a second water outlet plate, a second inclined plate and a third water outlet plate which are connected in sequence, and the connecting plate is connected to the inner wall of the cooling tower; the first water outlet plate, the second water outlet plate and the third water outlet plate are all horizontally arranged, the horizontal height is gradually reduced, and drain holes are uniformly distributed in the surfaces of the first water outlet plate, the second water outlet plate and the third water outlet plate.

In some embodiments: the volute type ejector comprises an upper volute, a lower volute, a nozzle, an air induction port and a water inlet; the nozzle sets up perpendicularly with the water inlet dystopy, the nozzle is bilayer structure, the inlayer is the water spout, the skin is bleed mouth, it has a plurality of induced air mouths to open on the bleed mouth lower part perisporium, this kind of structure enables the water that gets into by the water inlet and gets into bilayer structure's nozzle after the spiral case is rotatory, the water spout of inlayer is under the condition of outer induced air mouth ventilation, because the water spout produces the negative pressure at the injection in-process, the induced air function has, the air supply volume in the tower has been increased, constitute the schizolysis of blowout water droplet and produce even tiny water droplet, make the water droplet and the area of contact increase of unsaturated air, thereby fully carry out the heat exchange with the unsaturated air that gets into through the rectifier hole, the cold efficiency has further.

In some embodiments: a forward and reverse flow running space combining jet water drops and unsaturated air is formed between the multidimensional water collector and the jet water distribution system, and a heat exchange space between fine water drops and unsaturated air is ensured.

In some embodiments: the honeycomb rectifier is a hexagonal honeycomb structure body formed by bonding a plurality of curved sheets and flat sheets, plays a role in air diversion, enables air flow to uniformly enter a tower cavity without generating vortex, and water drops sprayed from the ejector flow downstream to the multidimensional water collector and uniformly flow back to the honeycomb rectifier under the action of gravity to be secondarily cooled and then fall into a water collecting tank; the honeycomb rectifier is characterized in that a plurality of curved sheets are firstly bonded into a plurality of hexagonal honeycomb structures, then the hexagonal honeycomb structures are sequentially bonded to form the honeycomb rectifier, a flat sheet is inserted between two adjacent hexagonal honeycomb structures, the flat sheet can be bonded with the hexagonal honeycomb structures, and the pressure bearing capacity of the honeycomb rectifier can be improved by the flat sheet.

In some embodiments: prevent that the wall flow board from inboard side to outside limit equipartition in proper order has a plurality of basins, and the equipartition has a plurality of wash ports in every basin, is equipped with the drainage groove between two adjacent basins, and the diameter of wash port is from preventing that the inboard side of flowing the board to the direction on outside limit enlarges gradually.

In some embodiments: the anti-wall flow plate and the side wall of the tower body form an angle of 30-60 degrees.

In some embodiments: the top of the connecting plate is provided with an inclined plane.

In some embodiments: the edge of each drainage hole is provided with a concave drainage surface.

In some embodiments: each drain hole is connected with a V-shaped water dripping frame.

The principle of the utility model is as follows

From the thermodynamic perspective, both the forward-reverse flow jet flow compound cooling tower and the traditional reverse flow filler cooling tower belong to wet cooling towers, heat transfer is mainly carried out through heat and mass exchange when water is in direct contact with air, the heat is transferred to unsaturated air through water, so that the water temperature is lowered, the air temperature is raised, the moisture content is increased, and the unsaturated air is discharged into the atmosphere.

According to the thermodynamic theory, the temperature difference is the driving force of the transfer process, the partial pressure difference of the vapor is the driving force of the mass exchange, and the evaporation and cooling play a leading role; the forward and reverse flow jet flow compound cooling tower jets water flow out through the jet device, simultaneously, water beams are cracked and refined into a plurality of fine water drops, the contact area of the fine water drops and unsaturated air is increased, the jet water drops are fully contacted and stirred with air flow by the kinetic energy of the jetted water drops jetted to the tower cavity, the heat and mass exchange of the water and the air is facilitated, the cooling speed of the water drops is accelerated, after the jetted water drops flow forward to the multidimensional water collector, the water drops flow back to the honeycomb rectifier under the action of gravity and fall into the water collecting tank after secondary cooling, so the whole heat and mass exchange process is not the simple reverse flow type of the traditional packed tower but the organic combination of the forward flow and the reverse flow, the air flow in the tower cavity is continuously stirred, the relative flow rate of the gas-liquid contact area is increased, and the heat exchange efficiency of the forward and reverse flow jet.

When the cooling tower operates, a large number of fine water drops are mixed with saturated wet air in the tower, and the fine water drops are easy to drift outside the tower under the action of a fan, so that the circulating water is lost, and the surrounding environment is influenced; the multi-dimensional water collector has the characteristics that: the guide channel forms a unique multidimensional space, the ventilation resistance is small, the guide channel is uniformly placed below the fan platform at the top of the tower, the vortex phenomenon caused by the rotation of the fan is effectively controlled, the unstable factor of the flow state in the tower cavity is improved, and the water removal efficiency is further improved.

The honeycomb rectifier is a hexagonal honeycomb structure formed by bonding a plurality of curved sheets, so that air flow uniformly enters a tower cavity without generating vortex, the relative flow velocity of a gas-liquid contact area is increased, water drops sprayed by the jet device are not aggregated, the water drops are uniformly distributed, and the air and the water drops are fully subjected to heat exchange.

The volute type ejector comprises an upper volute, a lower volute, a nozzle, an air inducing port and a water inlet, wherein the nozzle and the water inlet are not positioned on the same vertical central line, and the water inlet deviates from the central line of the nozzle, so that water sprayed out of the nozzle generates a rotational flow, and water beams are cracked and refined into a plurality of fine water drops; the nozzle is of a double-layer structure, the inner layer is a water spray nozzle, the outer layer is an air inducing nozzle, the peripheral wall of the air inducing nozzle is provided with a plurality of air inducing ports, and the nozzle generates negative pressure around the nozzle in the jetting process and has the air inducing function; the water and the unsaturated air are fully subjected to heat exchange in the spraying process, so that the heat exchange efficiency is improved; because the negative pressure generated by the jet flow assists in pumping in external unsaturated air, compared with the traditional countercurrent filling cooling tower, the countercurrent jet flow compound cooling tower has higher cooling efficiency than the countercurrent filling cooling tower under the same working condition.

The utility model has the advantages that: stable cold effect, low maintenance, energy conservation, environmental protection and convenient maintenance.

Drawings

FIG. 1 is a schematic structural view of a forward and reverse flow cooling tower according to the present invention;

FIG. 2 is a front view of the multi-dimensional water collector structure of the present invention;

FIG. 3 is a schematic structural view of the multi-dimensional water collector of the present invention;

fig. 4 is a front view of the spiral case type ejector structure of the present invention;

fig. 5 is a schematic structural view of the volute type ejector of the present invention;

fig. 6 is a schematic top view of the spiral case type ejector of the present invention;

FIG. 7 is a front view of the honeycomb rectifier of the present invention;

FIG. 8 is a schematic structural view of the honeycomb rectifier of the present invention;

fig. 9 is a schematic view of the wall flow prevention plate structure of the present invention;

fig. 10 is a schematic structural view of the drain hole of the present invention;

wherein: 1. the water collecting device comprises a motor, a speed reducer, 2, a fan, 3, an air duct, 4, a multi-dimensional water collector, 5, a straight piece, 6, a multi-dimensional piece, 7, a multi-dimensional water collector frame, 8, an access ladder, 9, an access door, 10, a jet water distribution main pipe, 11, a branch pipe, 12, a volute type ejector, 13, a water nozzle, 14, an air induction nozzle, 15, an air induction port, 16, an upper volute, 17, a lower volute, 18, a water inlet, 19, a honeycomb rectifier, 20, a honeycomb rectifier bent piece, 21, a honeycomb rectifier frame, 23, an air deflector, 24, an air inlet, 25, a glass steel panel, 26, a water collecting tank, 28, a wall flow preventing plate, 281, a connecting plate, 282, a first water outlet plate, 283, a first inclined plate, 284, a second water outlet plate, 285, a second inclined plate, 286, a third water outlet plate, 287, a water outlet hole, 288, an inclined plane, 289 and a V.

Detailed Description

The present invention will be described in further detail with reference to the following description of the drawings.

As shown in fig. 1-8, a co-current flow cooling tower comprises: the co-current and counter-current jet flow compound cooling tower comprises: the device comprises a motor and speed reducer 1, a fan 2, an air duct 3, a multi-dimensional water collector 4, a jet water distribution main pipe 10, a branch pipe 11, a volute type ejector 12, a honeycomb rectifier 18 and a water collecting tank 26; the motor and speed reducer 1, the fan 2 and the air duct 3 are positioned on the top of the tower; the multidimensional water collector 4 is positioned in the tower below the tower top air duct 3, is uniformly distributed on the plane of the whole multidimensional water collector frame 7 and is fixed on the multidimensional water collector frame 7, the multidimensional water collector 4 is bonded into a hexagonal honeycomb structure by a multidimensional sheet 6 and a straight sheet 5, and has good water removal efficiency, high strength, no deformation and longer service life than a general water collector by more than one time; the outer surfaces of the left side and the right side of the tower body and the front side and the rear side above the middle section (an air inlet 24) of the tower body are additionally provided with glass fiber reinforced plastic panels 25 for coating, a space for combining unsaturated air and water drops is formed between the multidimensional water collector 4 and the volute type ejector 12, and the water drops are cracked in the space to form an increased contact area; the jet flow water distribution system is positioned at the middle lower part of the tower and comprises a main water distribution pipe 10, a branch pipe 11 and a volute type jet device 12; the volute type ejectors 12 are uniformly distributed in the tower along the branch pipes 11; the volute type ejector 12 consists of a water spray nozzle 13, an air induction nozzle 14, an air induction port 15, an upper volute 16, a lower volute 17 and a water inlet 18, wherein the water spray nozzle 13 and the water inlet 18 are arranged in an ectopic vertical mode, and the central line of the water inlet deviates from the central line of the water spray nozzle, so that water sprayed out of the water spray nozzle generates a rotational flow, and water beams are cracked and refined into a plurality of fine water drops; the nozzle is of a double-layer structure, the inner part is a water spray nozzle 13, the outer layer is a gas leading nozzle 14, and the peripheral wall of the lower part of the gas leading nozzle 14 is provided with a plurality of gas leading ports 15; a honeycomb rectifier is arranged below the volute type ejector, the honeycomb rectifier 19 is a hexagonal honeycomb structure body formed by bonding a plurality of honeycomb curved sheets 20 and flat sheets, is uniformly distributed on the plane of the whole honeycomb rectifier frame 21 and is fixed above the honeycomb rectifier frame 21, so that air flow uniformly enters a tower cavity without generating vortex, the relative flow rate of gas-liquid contact area is increased, water drops sprayed by the volute type ejector are not aggregated, are uniformly distributed, and are fully subjected to heat exchange with unsaturated air; an air inlet 24 is arranged between the lower part of the honeycomb rectifier frame 21 and the water collecting tank 26, and a wall flow preventing plate 28 is arranged above the front side and the rear side of the air inlet 24 to prevent water drops from overflowing; the air deflector 23 is arranged in the vertical middle below the honeycomb rectifier frame 21, faces the air inlet 24, and is upward to the horizontal plane of the honeycomb rectifier frame 21 and the water collecting tank 26, water drops fall through the honeycomb rectifier 19, and in the process of entering the water collecting tank 26 through the air inlet 24, the water drops are not easy to float out of the tower from the air inlet 24 due to overlarge external wind power.

As shown in fig. 9 and 10, one side of the anti-flow plate 28 is connected to the inner wall of the tower body 6 and located at the lower edge of the honeycomb rectifier 19, the anti-flow plate 28 forms an angle of 30-60 ° with the side wall of the tower body 6, and in this embodiment, the anti-flow plate 28 forms an angle of 40 ° with the side wall of the tower body 6. In another embodiment, the anti-flow plate 28 includes a connecting plate 281, a first water outlet plate 282, a first inclined plate 283, a second water outlet plate 284, a second inclined plate 285 and a third water outlet plate 286 which are connected in sequence, and the connecting plate 281 is connected to the inner wall of the cooling tower; the first water outlet plate 282, the second water outlet plate 284 and the third water outlet plate 286 are all horizontally arranged, the horizontal height gradually decreases, and the surfaces of the first water outlet plate 282, the second water outlet plate 284 and the third water outlet plate 286 are uniformly provided with water discharge holes 287. Therefore, by adopting the stepped water outlet plates, when water flowing through the wall flows through each water outlet plate in sequence, one part of the water is uniformly scattered through the water outlet holes, the other part of the water is splashed out, and the last part of the water flows to the next water outlet plate along the inclined plate to form multi-stage dispersion, so that the heat exchange effect is improved. The top of the connecting plate is provided with an inclined plane 288, which is convenient for the wall-flowing water to flow to the anti-wall flow plate. The edge of each drain hole is provided with a drain concave surface which can guide water on the water guide plate to flow to the drain hole. Every wash port all is connected with V-arrangement and drips frame 289, and the inward flange of wash port is connected to two free ends of V-arrangement frame, can make the water of every wash port drip through the V-arrangement frame formation water droplet fast and drip, improves the heat transfer effect.

The utility model discloses a direct current and countercurrent flow cooling tower is the function like this: starting a motor and a speed reducer 1 and a pump of a circulating water system, wherein the motor and the speed reducer 1 drive a fan 2 in an air duct 3 to rotate, so that unsaturated air is sucked from an air inlet 24 and uniformly enters an inner cavity of a tower body after passing through a honeycomb rectifier 19; the main jet water distribution pipe 10 and the branch pipes 11 send water to a water inlet 18 of the volute type ejector 12, the water enters a water spray nozzle 13 of a double-layer nozzle inner layer after rotating in a cavity of the volute type ejector 12 and is sprayed out, negative pressure is generated at the same time, and an air guide nozzle 14 enables water beams to be cracked and refined into a plurality of fine water drops after unsaturated air entering through an air guide opening 15 is mixed with water under the action of the negative pressure, so that heat exchange can be fully carried out on the unsaturated air entering through a honeycomb rectifier 19; the water drops sprayed by the volute type ejector 12 flow downstream to the multi-dimensional water collector 4 and then flow back to the honeycomb rectifier 19 under the action of gravity for secondary cooling, fall into the water collecting tank, and then are sent out by the water pump to each heat exchange device and then return to the cooling tower for cyclic use.

The above description is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of similar modifications and improvements can be made without departing from the inventive concept, and these should also be considered as within the protection scope of the present invention.

Claims (9)

1. The forward and reverse flow cooling tower is characterized in that: the device comprises a motor, a speed reducer, a fan, an air duct, a multi-dimensional water collector, a jet flow water distribution system, a volute type jet device, a honeycomb rectifier, a wall flow prevention plate, an air inlet, an air deflector and a water collecting tank; the motor, the speed reducer, the fan and the air duct are positioned on the top of the tower; the multi-dimensional water collector is positioned below the tower top platform; the jet flow water distribution system is positioned at the middle lower part of the tower body; the spiral case type ejectors are uniformly distributed in the jet water distribution system; a forward-reverse flow operation space combining jet water drops and air is formed between the multidimensional water collector and the jet water distribution system; a honeycomb rectifier is arranged below the jet flow water distribution system; the anti-wall flow plate is positioned below the honeycomb rectifier frame; a water collecting tank is arranged at the bottom of the tower, and an air deflector is arranged at the vertical middle position of the tower above the water collecting tank and below the honeycomb rectifier frame, and faces the air inlet; the anti-wall flow plate comprises a connecting plate, a first water outlet plate, a first inclined plate, a second water outlet plate, a second inclined plate and a third water outlet plate which are connected in sequence, and the connecting plate is connected to the inner wall of the cooling tower; the first water outlet plate, the second water outlet plate and the third water outlet plate are all horizontally arranged, the horizontal height is gradually reduced, and drain holes are uniformly distributed in the surfaces of the first water outlet plate, the second water outlet plate and the third water outlet plate.

2. The co-current flow cooling tower of claim 1, wherein: the multi-dimensional water collector is bonded into a hexagonal honeycomb structure body by a multi-dimensional sheet and a straight sheet.

3. The co-current flow cooling tower of claim 2, wherein: the volute type ejector comprises an upper volute, a lower volute, a nozzle, an air inducing port and a water inlet, wherein the nozzle and the water inlet are arranged in a position different from each other and are vertically arranged, the nozzle is of a double-layer structure, the inner layer is a water spraying nozzle, the outer layer is an air inducing nozzle, and the peripheral wall of the lower part of the air inducing nozzle is provided with the air inducing ports.

4. The co-current flow cooling tower of claim 1, wherein: the honeycomb rectifier is a hexagonal honeycomb structure formed by bonding a plurality of curved sheets and flat sheets.

5. The co-current flow cooling tower of claim 1, wherein: the anti-wall-flow plate is sequentially and evenly provided with a plurality of water grooves from the inner side to the outer side, a plurality of drain holes are evenly distributed in each water groove, a drainage groove is arranged between every two adjacent water grooves, and the diameter of each drain hole is gradually increased from the inner side to the outer side of the anti-wall-flow plate.

6. The co-current flow cooling tower of claim 1, wherein: the wall flow prevention plate and the side wall of the tower body form an angle of 30-60 degrees.

7. The co-current flow cooling tower of claim 1, wherein: the top of the connecting plate is provided with an inclined plane.

8. The co-current flow cooling tower of claim 1, wherein: and the edge of each drainage hole is provided with a drainage concave surface.

9. The co-current flow cooling tower of claim 1, wherein: each drain hole is connected with a V-shaped water dripping frame.

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