CN211823917U

CN211823917U - Water conservation reduces discharging cooling tower

Info

Publication number: CN211823917U
Application number: CN202020356566.9U
Authority: CN
Inventors: 王洵
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-10-30
Anticipated expiration: 2030-03-12

Abstract

The utility model discloses a water conservation and emission reduction cooling tower, including cooling tower body and the heat transfer mechanism of setting in cooling tower body air intake department, heat transfer mechanism includes dividing wall heat exchanger and catch basin, the thermal current import of dividing wall heat exchanger is linked together through connecting pipe and cooling tower wet return and is provided with the valve on the connecting pipe, the thermal current export of dividing wall heat exchanger is linked together with the cooling tower pond, the cold flow import department of dividing wall heat exchanger is provided with sewage spraying system, the cold flow export of dividing wall heat exchanger is linked together with the catch basin; a spray water replenishing pipe communicated with the water collecting tank is also arranged on the cooling tower water return pipe, and a valve is also arranged on the spray water replenishing pipe; when water flows through the dividing wall heat exchanger, part of heat load is shared, and the evaporation water quantity of the cooling tower is reduced.

Description

Water conservation reduces discharging cooling tower

Technical Field

The utility model relates to a cooling tower field, concretely relates to water conservation and emission reduction cooling tower.

Background

The cooling tower is a common industrial circulating cooling water device, which is divided into an open cooling tower and a closed cooling tower according to whether the air flow and the water flow directly contact for heat exchange, the open cooling tower has the advantages of high heat exchange efficiency and good cooling effect, therefore, the method is widely applied, but the amount of evaporated water is huge in the operation process of the open cooling tower, in order to keep the ion concentration in the circulating water stable, a part of high-concentration water needs to be periodically discharged, and a part of low-concentration water is supplemented, according to the existing industry standard, the sewage discharge mode of the cooling tower is that a part of circulating water is directly discharged from a water return pipe and flows to a sewage plant, an evaporation pond and the like, a large amount of sewage discharge not only increases the treatment burden but also causes the waste of water resources, as is well known, the sewage discharge amount and the evaporation amount of the cooling tower are in an obvious proportional relation, how to reduce the discharge of the cooling tower sewage by reducing the evaporation capacity of the cooling tower becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the background art, the utility model aims to provide a water conservation reduces discharging cooling tower, it has effectively solved the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a water-saving emission-reducing cooling tower comprises a cooling tower body and a heat exchange mechanism arranged at an air inlet of the cooling tower body, wherein the heat exchange mechanism comprises a dividing wall heat exchanger and a water collecting tank arranged below the dividing wall heat exchanger, a heat flow inlet of the dividing wall heat exchanger is communicated with a cooling tower return water pipe through a connecting pipe, a valve is arranged on the connecting pipe, a heat flow outlet of the dividing wall heat exchanger is communicated with the cooling tower water tank, a sewage spraying system is arranged at a cold flow inlet of the dividing wall heat exchanger, a cold flow outlet of the dividing wall heat exchanger is communicated with the water collecting tank, the sewage spraying system comprises a spraying pipe communicated with the water collecting tank and a spray head arranged on the spraying pipe and corresponding to the cold flow inlet of the dividing wall heat exchanger, and a water pump is arranged on the; and a spray water replenishing pipe communicated with the water collecting tank is also arranged on the cooling tower water return pipe, and a valve is also arranged on the spray water replenishing pipe.

Further, the dividing wall heat exchanger is a coil.

Furthermore, the coil pipe is positioned on the outer side of the air inlet of the cooling tower body, and a water collector is arranged at the air inlet of the cooling tower body.

Furthermore, the coil pipe is positioned on the inner side of the air inlet of the cooling tower body, a main cooling cavity corresponding to the cooling tower water pool is arranged in the cooling tower body, an air inlet corresponding to the air inlet of the cooling tower is arranged on the main cooling cavity, and a water collector is arranged at the air inlet.

Further, a sewage rain area is arranged below the coil pipe.

Further, the dividing wall heat exchanger is a sewage and water purification combined heat exchanger, the sewage and water purification combined heat exchanger comprises a plurality of water purification channels with openings at the upper part and the lower part, the upper openings of the water purification channels correspond to the outlets of the connecting pipes, the lower openings of the water purification channels correspond to the cooling tower water pools, sewage channels with openings at the upper part and the lower part and the left side and the right side are arranged between the adjacent water purification channels, the upper openings of the sewage channels correspond to the spray heads on the spray pipes, the lower openings of the sewage channels correspond to the water collection pools, water baffle plates are fixedly arranged on the upper surface of the sewage and water purification combined heat exchanger and divide the upper surface of the sewage and water purification combined heat exchanger into a sewage spray area and a water purification spray area, the outlets of the connecting pipes and the spray heads on the spray pipes are respectively positioned in the water, the upper opening of the sewage channel positioned in the purified water spraying area is closed, and the upper opening of the purified water channel positioned in the sewage spraying area is closed.

Furthermore, the outlet of the connecting pipe is also provided with a spray head.

Further, the cooling tower body includes dryer, tower body, main water collector, with main shower that the cooling tower wet return is linked together and set up the filler in main shower below, be provided with the draught fan in the dryer.

The utility model discloses following beneficial technological effect has:

the utility model applies the dividing wall heat exchanger arranged at the air inlet of the cooling tower body, shares the heat load of part of the cooling tower backwater when water flows in the dividing wall heat exchanger, thereby reducing the heat load born in the tower, because the amount of water evaporated by the cooling tower is positively correlated with the temperature of the air entering the tower, negatively correlated with the relative humidity of the air entering the tower and positively correlated with the heat load in the tower, so that the reduction of the heat load in the tower also reduces the evaporation water quantity of the cooling tower, when the dividing wall heat exchanger sprays sewage outside, the air entering the cooling tower is cooled by the sewage, enters the cooling tower in a saturated state close to the wet bulb temperature, which also reduces the amount of evaporated water in the cooling tower, in addition, the spraying sewage can also effectively intercept and block the flocculent impurities in the air entering the tower from the outside, so that the cleanness of the cooling tower and the heat exchanger of the device can be maintained, and the cooling tower and the heat exchanger of the device can be maintained in a good running state.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third embodiment of the present invention;

FIG. 4 is a top view of a sewage-water purification combined heat exchanger according to a third embodiment of the present invention;

fig. 5 is a right side view of the sewage and water purification combined heat exchanger according to the third embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, the cooling tower of this embodiment for saving water and reducing emission includes a cooling tower body 1 and a heat exchange mechanism 2 disposed at an air inlet of the cooling tower body 1, the heat exchange mechanism 2 includes a partition wall heat exchanger and a water collecting tank 3 disposed below the partition wall heat exchanger, a heat flow inlet of the partition wall heat exchanger 3 is communicated with a cooling tower water return pipe 5 through a connecting pipe 4, a valve is disposed on the connecting pipe 4, a heat flow outlet of the partition wall heat exchanger is communicated with a cooling tower water tank 6, a sewage spraying system is disposed at a cold flow inlet of the partition wall heat exchanger, a cold flow outlet of the partition wall heat exchanger is communicated with the water collecting tank 3, the sewage spraying system includes a spraying pipe 7 communicated with the water collecting tank 3 and spraying nozzles 8 disposed on the spraying pipe 7 and corresponding to the cold flow inlet of the partition wall heat exchanger, preferably, a plurality of the spraying; still be provided with the spray moisturizing pipe 10 that is linked together with the catch basin 3 on the cooling tower wet return 5, also be provided with the valve on the spray moisturizing pipe 10 for regularly discharge high ion concentration sewage in to the catch basin 3, the next door heat exchanger is coil pipe 11, and coil pipe 11 is located the outside of cooling tower body 1 air intake department and cooling tower body 1 air intake department is provided with and receives hydrophone 12, avoids the spray that shower 7 sent out to get into cooling tower pond 6.

The cooling tower body 1 comprises an air duct 13, a tower body 14, a main water collector 15, a main spray pipe 16 communicated with the cooling tower water return pipe 5 and a filler 17 arranged below the main spray pipe 16, and an induced draft fan 26 is arranged in the air duct 13.

The working principle of the embodiment is as follows:

the external air enters the tower through the coil pipe 11 to exchange heat with the cooling tower return water and then is discharged out of the tower, when the external environment temperature is low, a valve on the connecting pipe 4 is opened, a part of the cooling tower return water enters the coil pipe 11 to flow for heat release and then flows back to the cooling tower water pool 6, the other part of the cooling tower return water still enters the main spray pipe 16, in the process, the external environment air exchanges heat with the water in the coil pipe 11 to take away a part of heat load, the heat load in the tower is reduced, the evaporation of the cooling tower return water is avoided when the part of the heat load is completed, and the evaporation capacity and the discharge capacity of the cooling tower are reduced while the heat load in the tower is reduced;

focusing on reducing the evaporation rate or when foreign matters in the outside air are more, closing a valve on a connecting pipe 4, opening a water pump 9, spraying water stored in a water collecting tank 3 (namely high-ion-concentration sewage periodically discharged from a cooling tower water return pipe 5) to the outer side of a coil pipe 11, at the moment, enabling tower inlet air to be firstly contacted with water flow sprayed by a spraying pipe 7, cleaning the tower inlet air of the cooling tower, reducing the temperature of the tower inlet air of the cooling tower, wherein the temperature is close to the wet bulb temperature, and the relative humidity is close to 100 percent, and reducing the evaporation rate because the evaporation water quantity of the cooling tower is positively correlated with the temperature of the tower inlet air, negatively correlated with the relative humidity of the tower inlet air, and positively correlated with the thermal load in the tower, in addition, when the embodiment is applied to a cooling tower with a dry cooling process such as closed cooling, the temperature difference between the tower inlet air and the cooling tower return water is increased, thereby improving the, the cooling of the return water of the cooling tower is facilitated;

when environment wet bulb temperature further improved, can open the valve on water pump 9 and the connecting pipe 4 simultaneously, the tower thermal load will reduce this moment, because coil pipe 11 has accomplished partly thermal load, the external tower air that advances is close the saturation after spraying water and coil pipe 11, has reduced the evaporation rate, simultaneously, because there is hot water can provide the heat for the sewage evaporation in the coil pipe 11, sewage temperature risees, has increased sewage evaporation efficiency, is favorable to the follow-up heat preservation and the processing of sewage.

Example two

As shown in fig. 2, the difference between the first embodiment and the first embodiment lies in that the coil 11 is located inside the air inlet of the cooling tower body 1, and the cooling tower body 1 is provided with the main cooling chamber 18 corresponding to the cooling tower water pool 6, the main water collector 15 covers the main cooling chamber 18 and the coil 11, the main cooling chamber 18 is provided with the air inlet corresponding to the air inlet of the cooling tower body 1, and the air inlet is provided with the water collector 12, the lower part of the coil 11 is provided with the sewage rain area 19, thereby the sewage rain area 19 formed by reducing the number of the return strokes of the lower part of the coil 11 is more beneficial to the contact between the tower inlet air and the sewage, and the good contact between the tower inlet air and.

The working principle of the embodiment is as follows:

when the ambient temperature is lower, a valve on the connecting pipe 4 is opened, the water pump 9 is closed, a part of cooling tower backwater flows into the coil pipe 11 and then flows to the cooling tower water pool 6, the other part of cooling tower backwater still enters the main spray pipe 16, in the process, the outside tower entering air exchanges heat with water in the coil pipe 11 to complete a part of heat load, a part of sub-tower air exchanges heat with water flow sprayed by the main spray pipe 16 through the filler 17 to generate saturated humid hot air above the filler 17, the other part of sub-tower air absorbs heat of the water flow in the coil pipe 11 and then directly ascends to generate dry hot air above the coil pipe 11, the two parts of the sub-tower air and the water flow pass through the main water receiver 15 to be mixed, and the mixed air is in an unsaturated state, so that the formation of white mist is effectively avoided, the water vapor content at the outlet of the air duct.

Focusing on reducing the evaporation rate or when foreign air impurities are more, closing a valve on a connecting pipe 4, opening a water pump 9, and spraying water stored in a water collecting tank 3 (namely high-ion-concentration sewage periodically discharged from a cooling tower water return pipe 5) to the outer side of a coil pipe 11, at the moment, tower inlet air firstly contacts with water flow sprayed by a spraying pipe 7, the temperature of the tower inlet air of the cooling tower is reduced while the tower inlet air of the cooling tower is cleaned, the temperature is close to the wet bulb temperature, and the relative humidity is close to 100 percent, because the evaporation water quantity of the cooling tower is positively correlated with the temperature of the tower inlet air, negatively correlated with the relative humidity of the tower inlet air, and positively correlated with the thermal load in the tower, the evaporation rate is also reduced, in addition, when the embodiment is applied to a cooling tower with a dry cooling process such as a closed cooling tower, the temperature difference between the tower inlet air and the return water of the cooling tower is increased, the cooling of the return water of the cooling tower is facilitated;

EXAMPLE III

As shown in fig. 3-5, the present embodiment is different from other embodiments in that the dividing wall heat exchanger is a sewage and water purifying combined heat exchanger 20, the sewage and water purifying combined heat exchanger 20 includes a plurality of water purifying channels 21 with openings at both upper and lower portions, the upper opening of the water purifying channel 21 corresponds to the outlet of the connecting pipe 4, the outlet of the connecting pipe 4 is also provided with a plurality of spray nozzles 8, and the preferred number of spray nozzles 8 is plural, the lower opening of the water purifying channel 21 corresponds to the cooling tower water pool 6, a sewage channel 22 with openings at both upper and lower portions and left and right portions is provided between the adjacent water purifying channels 21, the left and right openings are used for the external air to pass through and enter the cooling tower body 1, the upper opening of the sewage channel 22 corresponds to the spray nozzles 8 on the spray pipes 7, the lower opening of the sewage channel 22 corresponds to the water collecting pool, the material of the sheet 23 is metal such as stainless steel or plastics such as PVC, the sheet 23 parallel to each other encloses into the water purification channel 21 and the sewage channel 22 together, as a reference, the distance between the sheets 23 enclosing into the water purification channel 21 is 6mm, the left side of the bottom of the water purification channel 21 is not closed, the right side of the bottom is closed, so that the purified water flows into the cooling tower pool 6, the distance between the sheets 23 enclosing into the sewage channel 22 is 19mm, the left side of the bottom of the sewage channel 22 is closed, the right side of the bottom is not closed, so that the sewage can fall back into the water collecting pool 3 again, the closing means of the closed positions of the water purification channel 21 and the sewage channel 22 can be the bonding and closing of the separate shielding sheet 24 or the direct bonding of the edges of the adjacent sheets 23, the upper surface of the sewage purification composite heat exchanger 20 is also bonded with the water baffle 25, the upper edge of the water baffle 25 is not lower than the lower, the water baffle 25 separates the upper surface of the sewage and water purification composite heat exchanger 20 into a sewage spraying area and a water purification spraying area, the outlet of the connecting pipe 4 and the spray head 8 on the spray pipe 7 are respectively positioned in the water purification spraying area and the sewage spraying area, wherein the upper opening of the sewage channel 22 positioned in the water purification spraying area is closed, and the upper opening of the water purification channel 21 positioned in the sewage spraying area is closed.

The working principle of the embodiment is as follows:

the outside air passes through the sewage and water purification composite heat exchanger 20, enters the tower, exchanges heat with the cooling tower return water and is discharged out of the tower;

when the environmental temperature is lower, a valve on the connecting pipe 4 is opened, the connecting pipe 4 adds a part of the return water of the cooling tower into the sewage and water purification composite heat exchanger 20 and then flows to the water pool 6 of the cooling tower, and the other part of the circulating water still enters the main spray pipe 16, in the process, the external environmental air exchanges heat with the circulating water in the sewage and water purification composite heat exchanger 20 to complete a part of heat load, the heat load in the tower is reduced, the evaporation of the return water of the cooling tower is not completed in the part of heat load, because the tower inlet air passes through the sewage channel 22 and the water discharged from the connecting pipe 4 enters the water purification channel 21, the tower inlet air is not contacted with the flow water in the water purification channel 21, the heat load in the tower is reduced, and the evaporation capacity and the discharge.

When the evaporation rate needs to be reduced or the foreign matter in the outside air is more, the valve on the connecting pipe 4 is closed, the water pump 9 is started, the spray pipe 7 sprays the water in the water collecting tank 3 into the sewage channel 22 through the spray head 8 on the spray pipe, the sprayed water quality is sewage, the tower-entering air enters the sewage channel 22 to contact with the sewage for heat exchange, at the moment, the sewage and water purification combined heat exchanger 20 is equivalent to a humidifying and cooling device for the tower-entering air, the temperature of the tower-entering air of the cooling tower can be reduced to about the wet bulb temperature and approximate to 100% relative humidity while the tower-entering air of the cooling tower is cleaned, because the evaporation water amount of the cooling tower is positively correlated with the temperature of the tower-entering air, negatively correlated with the relative humidity of the tower-entering air and positively correlated with the thermal load in the tower, the evaporation rate is also reduced, in addition, when the embodiment is applied to the cooling tower with a dry cooling process, such as a closed cooling, thereby improving the total heat exchange quantity and being beneficial to cooling the return water of the cooling tower.

When environment wet bulb temperature further improves, can open the valve on water pump 9 and the connecting pipe 4 simultaneously, cooling tower heat load at this moment will reduce, because the cooling of a part of heat load has been accomplished to sewage water purification combined type heat exchanger 20, simultaneously, ambient air passes and is close the saturation behind the sewage water purification combined type heat exchanger 20 entering cooling tower, this can reduce the evaporation rate to open cooling tower, simultaneously because there is hot water (the 5 backwaters of cooling tower wet return pipe that the connecting pipe 4 sent out) can provide the heat for the sewage evaporation in the sewage water purification combined type heat exchanger 20, so sewage evaporation efficiency has been increased, be favorable to the follow-up heat preservation and the processing of sewage.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A water-saving emission-reducing cooling tower is characterized by comprising a cooling tower body and a heat exchange mechanism arranged at an air inlet of the cooling tower body, wherein the heat exchange mechanism comprises a dividing wall heat exchanger and a water collecting tank arranged below the dividing wall heat exchanger, a heat flow inlet of the dividing wall heat exchanger is communicated with a cooling tower water return pipe through a connecting pipe, a valve is arranged on the connecting pipe, a heat flow outlet of the dividing wall heat exchanger is communicated with the cooling tower water tank, a cold flow inlet of the dividing wall heat exchanger is provided with a sewage spraying system, a cold flow outlet of the dividing wall heat exchanger is communicated with the water collecting tank, the sewage spraying system comprises a spraying pipe communicated with the water collecting tank and a spray head arranged on the spraying pipe and corresponding to the cold flow inlet of the dividing wall heat exchanger, and a water pump is arranged on the spraying; and a spray water replenishing pipe communicated with the water collecting tank is also arranged on the cooling tower water return pipe, and a valve is also arranged on the spray water replenishing pipe.

2. The water conservation and emission reduction cooling tower of claim 1, wherein the partition wall heat exchanger is a coil.

3. The water-saving emission-reducing cooling tower as claimed in claim 2, wherein the coil pipe is positioned outside the air inlet of the cooling tower body, and the water collector is arranged at the air inlet of the cooling tower body.

4. The water-saving emission-reducing cooling tower as claimed in claim 2, wherein the coil is located inside an air inlet of the cooling tower body, a main cooling cavity corresponding to a water pool of the cooling tower is arranged in the cooling tower body, an air inlet corresponding to the air inlet of the cooling tower is arranged on the main cooling cavity, and a water collector is arranged at the air inlet.

5. The water conservation and emission reduction cooling tower of claim 4, wherein a sewage rain area is arranged below the coil pipe.

6. The water-saving emission-reducing cooling tower as claimed in claim 1, wherein the dividing wall heat exchanger is a sewage-water-purifying combined type heat exchanger, the sewage-water-purifying combined type heat exchanger comprises a plurality of water-purifying channels with openings at upper and lower portions, the upper openings of the water-purifying channels correspond to the outlets of the connecting pipes, the lower openings of the water-purifying channels correspond to the water pools of the cooling tower, sewage channels with openings at upper and lower portions and left and right portions are arranged between adjacent water-purifying channels, the upper openings of the sewage channels correspond to the spray nozzles on the spray pipes, the lower openings of the sewage channels correspond to the water pools, a water baffle is further fixedly arranged on the upper surface of the sewage-water-purifying combined type heat exchanger, the water baffle divides the upper surface of the sewage-water-purifying combined type heat exchanger into a sewage spray area and a purified water spray area, the outlets of the connecting pipes and the spray nozzles, wherein, the upper opening of the sewage channel positioned in the purified water spraying area is closed, and the upper opening of the purified water channel positioned in the sewage spraying area is closed.

7. The water conservation and emission reduction cooling tower of claim 1, wherein the outlet of the connecting pipe is also provided with a spray head.

8. The cooling tower of claim 1, wherein the cooling tower body comprises an air duct, a tower body, a main water collector, a main spray pipe communicated with the cooling tower water return pipe, and a filler arranged below the main spray pipe, and an induced draft fan is arranged in the air duct.