CN106931799B - Cooling tower device with water replenishing and scale preventing functions and control method - Google Patents
Cooling tower device with water replenishing and scale preventing functions and control method Download PDFInfo
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- CN106931799B CN106931799B CN201710192420.8A CN201710192420A CN106931799B CN 106931799 B CN106931799 B CN 106931799B CN 201710192420 A CN201710192420 A CN 201710192420A CN 106931799 B CN106931799 B CN 106931799B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 545
- 238000001816 cooling Methods 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims description 18
- 239000000498 cooling water Substances 0.000 claims abstract description 180
- 239000007788 liquid Substances 0.000 claims description 82
- 239000007921 spray Substances 0.000 claims description 57
- 238000005507 spraying Methods 0.000 claims description 47
- 238000012360 testing method Methods 0.000 claims description 20
- 239000008399 tap water Substances 0.000 claims description 18
- 235000020679 tap water Nutrition 0.000 claims description 17
- 230000009469 supplementation Effects 0.000 claims description 6
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 8
- 230000005764 inhibitory process Effects 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 239000013589 supplement Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F2025/005—Liquid collection; Liquid treatment; Liquid recirculation; Addition of make-up liquid
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention provides a cooling tower device with water supplementing and scale preventing functions, which comprises a cooling water system, a rainwater collecting and purifying system, a control device, a water cooling unit, a temperature sensor and a fire water tank system, wherein the rainwater collecting and purifying system is connected with the water cooling unit; the cooling water system is communicated with the water cooling unit and is used for exchanging heat with the water cooling unit; the rainwater collecting and purifying system is communicated with the fire water tank system and is used for supplying water to the fire water tank system; the fire-fighting water system is communicated with the cooling water system and is used for cooling the cooling water system; the temperature sensor is used for detecting the temperature of cooling water which is exchanged heat from the water cooling unit, and sending a signal to the control device, and the control device controls the whole system to operate. The invention has the advantages that: the problem of scaling of the cooling tower can be reduced, the heat exchange efficiency is improved, and the operation cost is reduced; and make the water in the fire water tank be in the mobile state, not only can prevent that fire water tank from producing the scale deposit phenomenon, and can indirectly realize energy-conserving function.
Description
Technical Field
The invention relates to the technical field of cooling water, in particular to a cooling tower device with water supplementing and scale preventing functions and a control method.
Background
Along with the continuous development of economic society, people demand higher and higher to the comfort level of indoor space, this makes water chiller and cooling tower complex central air conditioning also more and more popular, consequently, the cooling tower has also obtained large-scale use, and fire water tank is the necessary device of fire control again simultaneously. The existing cooling tower and fire water tank have the following problems in the using process:
(1) the cooling tower packing structure is prone to fouling. Research shows that cooling water is heated after heat exchange in the water cooling unit, the higher the temperature of the cooling water entering the cooling tower is, the lower the scale inhibition rate is, and on the contrary, the higher the scale formation rate is. Therefore, when the temperature of water entering the cooling tower in the cooling water system is too high, scale is easy to form, the heat exchange efficiency of the cooling tower is reduced, the operation effect of the whole air conditioning system is further influenced, and the great operation cost loss is caused.
(2) The fire water tank can be used except when a fire disaster happens, and all the other time does not work, so the fire water is static and free of mobility, scale is easily generated on the wall surface and the bottom of the fire water tank, and the later cleaning is inconvenient and the pipeline is blocked.
(3) When the cooling tower works, a large amount of water can be taken away in the heat exchange process of air and cooling water, so that the cooling water system needs to be supplemented with water frequently, and the water is supplemented through a large amount of tap water in the conventional method, so that the waste of water resources is caused.
In view of the above problems, some solutions have been proposed in the prior art. For example, the application date is: 2016.3.21, application number: 201620219012.8 discloses a descaling device for cooling tower filler, which can realize self-cleaning of the cooling tower, avoid the decrease of heat exchanger efficiency caused by ash accumulation and hardening of the cooling tower filler, but does not consider the problem of water supplement; for another example, the application date is: 2013.12.03, application number: 201320788410.8 discloses a fire water tank cold accumulation system for a chilled water system, which utilizes the cold accumulation capacity of the fire water tank but does not take into account the scaling problem of the fire water tank.
Although these techniques can improve some aspects of the problems, none of them have completely solved the above problems fundamentally. Therefore, how to fundamentally solve the problems of cooling tower scaling, water replenishing and fire water tank scaling also becomes an urgent need.
Disclosure of Invention
The invention aims to solve one of the technical problems and provides a cooling tower device with water replenishing and scale preventing functions, which is used for fundamentally solving the problems of scaling of a cooling tower, water replenishing and scaling of a fire water tank.
The invention realizes one of the technical problems as follows: a cooling tower device with water replenishing and scale preventing functions comprises a cooling water system, a rainwater collecting and purifying system, a control device, a water chiller, a temperature sensor and a fire water tank system;
the cooling water system comprises a cooling tower, a spraying water storage tank, a variable-frequency spraying water pump and a cooling water pump; the top of the cooling tower is connected with the water outlet side of the water cooling unit through a cooling tower water return pipe, and the water outlet end of the cooling tower water return pipe is provided with a first electromagnetic valve; the bottom of the cooling tower is connected with the spraying water storage tank through a cooling tower water supply pipe, and a second electromagnetic valve is arranged at the water inlet end of the cooling tower water supply pipe; the cooling tower water return pipe is connected with the cooling tower water supply pipe through a bypass pipe, and a third electromagnetic valve is arranged on the bypass pipe; the bottom of the spraying water storage tank is connected with the water inlet side of the water cooling unit through a water storage tank water outlet pipe, and the cooling water pump is arranged on the water storage tank water outlet pipe; the top of the cooling tower is also connected with the spraying water storage tank through a secondary spraying pipe, and the variable-frequency spraying water pump is arranged on the secondary spraying pipe;
the fire-fighting water tank system comprises a fire-fighting water tank, an ejector, a fire-fighting pipe network and a first liquid level sensor; the ejector is arranged on the cooling tower water return pipe, and the first liquid level sensor is arranged on the inner wall of the fire water tank; the lower part of the fire-fighting water tank is connected with the ejector through a fire-fighting water tank water outlet pipe, and a fourth electromagnetic valve is arranged on the fire-fighting water tank water outlet pipe; the fire-fighting pipe network is connected with the bottom of the fire-fighting water tank; a tap water replenishing pipe is arranged at the upper part of the fire-fighting water tank, and a fifth electromagnetic valve is arranged on the tap water replenishing pipe;
the rainwater collecting and purifying system is connected with the fire water tank; the temperature sensor is arranged on the cooling tower water return pipe on the water outlet side of the water cooling unit; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the variable-frequency spray water pump, the cooling tower, the cooling water pump, the temperature sensor and the first liquid level sensor are all electrically connected with the control device.
Furthermore, the rainwater collection and purification system comprises a rainwater collection container, a rainwater delivery pump and a second liquid level sensor; the upper part of the fire water tank is connected with the rainwater collecting container through an overflow water pipe; the lower part of the rainwater collection container is connected with the fire water tank through a rainwater delivery pipe, and the rainwater delivery pump is arranged on the rainwater delivery pipe; the second liquid level sensor is arranged on the inner wall of the rainwater collection container; the rainwater delivery pump and the second liquid level sensor are both electrically connected with the control device.
Further, the spraying water storage tank is arranged above the inside of the fire water tank.
Furthermore, the upper part of the spraying water storage tank is provided with an overflow drain pipe which is arranged at a position 5cm higher than the normal liquid level of the fire water tank.
Further, the water chiller set is arranged in the machine room, and the cooling tower, the rainwater collecting container, the fire water tank and the control device are all arranged on the roof.
The second technical problem to be solved by the invention is to provide a control method of a cooling tower device with water replenishing and scale preventing functions, which can fundamentally solve the problems of scaling of the cooling tower, water replenishing and scaling of a fire water tank.
The invention realizes the second technical problem in the following way: a control method of a cooling tower device with water replenishing and scale preventing functions is provided, and the method needs to use the cooling tower device; the method comprises the following steps:
step 1, setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of a fire water tank, testing an actual liquid level value Hx in the fire water tank in real time through a first liquid level sensor, comparing the Hx with Hx1 and Hx2 respectively, starting to replenish water to the fire water tank if the Hx is continuously measured by the first liquid level sensor to be less than Hx2, and stopping replenishing water until the Hx reaches Hx 1; if the first liquid level sensor continuously detects that Hx is larger than Hx1, starting the water-saving and water-proof tank to drain water until the water is drained until Hx reaches Hx1, and stopping draining water; if Hx is not less than Hx1 and is not more than Hx2 continuously measured by the first liquid level sensor, water replenishing and water discharging are not needed;
step 2, setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water cooling unit, testing the outlet water temperature value t of the cooling water of the water cooling unit in real time through a temperature sensor, comparing the t with t1 and t2 respectively, controlling the cooling tower to stop if the temperature sensor continuously tests that t is less than t2, and cooling the cooling water only through heat exchange of a spraying water storage tank; if the temperature sensor continuously detects that t is not less than t1 and is not more than t2, the water in the cooling tower and the fire water tank are started to carry out double cooling on the cooling water; if the temperature sensor continuously detects that t is more than t1, starting water in the cooling tower and the fire water tank to carry out double cooling on cooling water;
and 3, when a fire disaster occurs, controlling the cooling tower to stop through the control device, and controlling the rainwater collection container, the tap water replenishing pipe and the spraying water storage tank to simultaneously replenish water to the fire water tank.
Further, the step 1 specifically comprises:
setting a water replenishing level value Hyd of the rainwater collection container, and testing an actual level value Hy in the rainwater collection container in real time through a second liquid level sensor; setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of the fire water tank, testing the actual liquid level value Hx in the fire water tank in real time through a first liquid level sensor, comparing the Hx with Hx1 and Hx2 respectively, and selecting one of the following three steps to execute according to the comparison result:
step A1, if the first liquid level sensor continuously detects that Hx is smaller than Hx2, the fire water tank needs to be replenished with water, Hy and Hyd are compared at the moment, and if Hy is continuously detected by the second liquid level sensor to be smaller than or equal to Hyd, the rainwater delivery pump is controlled to stop through the control device, and the fifth electromagnetic valve is controlled to be opened so as to replenish water to the fire water tank through a tap water replenishing pipe; meanwhile, when the water is supplemented until Hx reaches Hx1, the control device controls the fifth electromagnetic valve to be closed so as to finish water supplementation, and then the step 2 is carried out;
if the second liquid level sensor continuously detects that Hy is larger than Hyd, the control device controls the rainwater delivery pump to be started, and controls the fifth electromagnetic valve to be closed so as to replenish water to the waterproof box through the rainwater collection container; meanwhile, when the water is supplemented until Hx reaches Hx1, the control device controls the rainwater delivery pump to be closed so as to finish water supplementation, and then the step 2 is carried out;
step A2, if the first liquid level sensor continuously detects that Hx is larger than Hx1, the fire water tank needs to be drained, the rainwater delivery pump is controlled to stop through the control device, the fifth electromagnetic valve is controlled to be closed, so that redundant water in the fire water tank is discharged into the rainwater collection container through the overflow water pipe, the drainage is stopped until the Hx reaches Hx1, and then the step 2 is carried out;
and A3, if Hx2 is not less than Hx and not more than Hx1 are continuously measured by the first liquid level sensor, it is indicated that water replenishing and draining are not needed for the fire water tank, the rainwater delivery pump is controlled to stop through the control device, the fifth electromagnetic valve is controlled to be closed, and then the step 2 is carried out.
Further, the step 2 specifically includes:
setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water cooling unit, testing the outlet water temperature value t of cooling water of the water cooling unit in real time through a temperature sensor, comparing the t with t1 and t2 respectively, and selecting one of the following three steps to execute according to a comparison result:
b1, if the temperature sensor continuously detects that t is less than t2, the system is in a low-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at a low frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be closed, controls the third electromagnetic valve to be opened, and simultaneously controls the cooling tower and the variable-frequency spray water pump to stop;
the cooling water is circulated at this time as follows: under the low-frequency operation of a cooling water pump, cooling water in the spray water storage tank enters a water cooling unit for heat exchange, the cooling water after heat exchange flows through a bypass pipe and returns to the spray water storage tank, meanwhile, the fire-fighting water in the fire-fighting water tank and the wall surface of the spray water storage tank are subjected to contact heat exchange, so that the temperature of the cooling water in the spray water storage tank is reduced, and then the step 3 is carried out;
b2, if the temperature sensor continuously detects that t is more than or equal to t2 and less than or equal to t1, the system is in a medium-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at a medium frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be opened, controls the third electromagnetic valve to be closed, and simultaneously controls the cooling tower to work and controls the variable-frequency spray water pump to work at a low frequency;
the cooling water is circulated at this time as follows: under the medium-frequency operation of a cooling water pump, cooling water in a spraying water storage tank enters a water cooling unit for heat exchange, and when the cooling water after heat exchange flows through an ejector, the cooling water is mixed with fire-fighting water ejected from a fire-fighting water tank for cooling; then when the cooling water flows through the top of the cooling tower, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump at low frequency again for cooling; finally, cooling water enters the cooling tower for cooling, flows back to the spraying water storage tank through a water supply pipe of the cooling tower, and then enters the step 3;
b3, if the temperature sensor continuously detects that t is more than t1, the system is in a high-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at high frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be opened, controls the third electromagnetic valve to be closed, and simultaneously controls the cooling tower to work and controls the variable-frequency spray water pump to work at high frequency;
the cooling water is circulated at this time as follows: under the high-frequency operation of a cooling water pump, cooling water in a spraying water storage tank enters a water cooling unit for rapid heat exchange, and when the cooling water after heat exchange flows through an ejector, the cooling water is firstly mixed with fire-fighting water ejected from a fire-fighting water tank for cooling; then when the cooling water flows through the top of the cooling tower, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump at high frequency again for cooling; and finally, cooling water enters the cooling tower for cooling, flows back to the spraying water storage tank through a water supply pipe of the cooling tower, and then enters the step 3.
Further, the step 3 specifically includes:
when a fire disaster happens, the control device controls the cooling water pump to operate at high frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be closed, controls the third electromagnetic valve to be opened, controls the cooling tower and the variable-frequency spray water pump to be stopped, so that cooling water is rapidly pumped to the spray water storage tank through the cooling water pump, and water is supplemented to the fire water tank through an overflow drain pipe on the spray water storage tank;
meanwhile, the control device controls the work of the rainwater delivery pump and controls the opening of the fifth electromagnetic valve so as to replenish water to the fire water tank through the rainwater collection container and the tap water replenishing pipe.
The invention has the following advantages:
1. when the system works, the working mode of the system can be adjusted in real time according to the monitored temperature change of the cooling water, so that the temperature of the cooling water after heat exchange is reduced before the cooling water enters the cooling tower, the scaling problem of the cooling tower can be reduced, the heat exchange efficiency is improved, and the operation cost is reduced; meanwhile, water in the fire water tank can be in a flowing state, so that the scaling phenomenon of the wall surface and the bottom of the fire water tank can be effectively prevented, and the energy-saving function can be indirectly realized.
2. During the in-service use, can carry out high-efficient heat transfer to the water chilling unit to ensure that the water chilling unit can high-efficient normal operation.
3. The rainwater resource that can make full use of collect carries out the moisturizing, can reduce the waste of water resource.
4. When a fire disaster happens, the fire-fighting water tank can be supplemented with water through a plurality of channels to ensure that the fire-fighting water tank has a sufficient water source, which is helpful for the smooth fire rescue work and reduces the harm caused by the fire disaster.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of a cooling tower apparatus with water replenishing and scale preventing functions according to the present invention.
Fig. 2 is a flow chart of water replenishing for the waterproof and watertight box according to the present invention.
Fig. 3 is a flow chart of the operation of the water chiller unit of the present invention.
Description of reference numerals:
100-cooling tower device, 1-cooling water system, 2-rainwater collection and purification system, 3-control device, 4-water chiller, 5-temperature sensor, 6-fire water tank system, 11-cooling tower, 12-spray water storage tank, 121-overflow drain pipe, 13-variable frequency spray water pump, 14-cooling water pump, 15-cooling tower return pipe, 151-first solenoid valve, 16-cooling tower water supply pipe, 161-second solenoid valve, 17-bypass pipe, 171-third solenoid valve, 18-water storage tank water outlet pipe, 19-secondary spray pipe, 21-rainwater collection container, 22-rainwater delivery pump, 23-second liquid level sensor, 24-overflow water pipe, 25-rainwater delivery pipe, 61-fire water tank, 62-ejector, 63-fire-fighting pipe network, 64-first liquid level sensor, 65-fire-fighting water tank water outlet pipe, 651-fourth electromagnetic valve, 66-tap water replenishing pipe and 661-fifth electromagnetic valve.
Detailed Description
Referring to fig. 1, a preferred embodiment of a cooling tower apparatus 100 with water replenishing and scale preventing functions according to the present invention includes a cooling water system 1, a rainwater collecting and purifying system 2, a control device 3, a water chiller 4, a temperature sensor 5 and a fire water tank system 6;
the cooling water system 1 comprises a cooling tower 11, a spraying water storage tank 12, a variable-frequency spraying water pump 13 and a cooling water pump 14; the top of the cooling tower 11 is connected with the water outlet side of the water cooling unit 4 through a cooling tower return pipe 15, the water outlet end of the cooling tower return pipe 15 is provided with a first electromagnetic valve 151, and when the first electromagnetic valve 151 is opened, cooling water which exchanges heat from the water cooling unit 4 can be sent to the cooling tower 11 through the cooling tower return pipe 15 for cooling; the bottom of the cooling tower 11 is connected with the spray water storage tank 12 through a cooling tower water supply pipe 16, a second electromagnetic valve 161 is arranged at the water inlet end of the cooling tower water supply pipe 16, and when the second electromagnetic valve 161 is opened, cooling water passing through the cooling tower 11 can be conveyed into the spray water storage tank 12; the cooling tower water return pipe 15 is connected with the cooling tower water supply pipe 16 through a bypass pipe 17, the bypass pipe 17 is provided with a third electromagnetic valve 171, and in implementation, if the first electromagnetic valve 151 and the second electromagnetic valve 161 are closed and the third electromagnetic valve 171 is opened at the same time, the cooling water which exchanges heat from the water cooling unit 4 can be directly conveyed into the spraying water storage tank 12, under the working condition, the scaling problem caused by the heat exchange of the cooling water through the cooling tower 11 can be essentially avoided, and the energy-saving function can be indirectly realized; the bottom of the spray water storage tank 12 is connected with the water inlet side of the water cooling unit 4 through a water storage tank outlet pipe 18, the cooling water pump 14 is arranged on the water storage tank outlet pipe 18, and when the spray water storage tank works, the cooling water can be pumped into the water cooling unit 4 through the cooling water pump 14 to be cooled; the top of the cooling tower 11 is also connected with the spraying water storage tank 12 through a secondary spraying pipe 19, the variable frequency spraying water pump 13 is arranged on the secondary spraying pipe 19, when the variable frequency spraying water pump 13 is started, cooling water in the spraying water storage tank 12 can be conveyed to the upper part of the cooling tower 11 to be mixed with cooling water after heat exchange, so that the temperature of the cooling water entering the cooling tower 11 is reduced, the lower the temperature of the cooling water is, the higher the scale inhibition rate of the cooling water is, and the lower the scale inhibition rate is, the lower the scale inhibition rate is correspondingly, and the scaling problem caused by heat exchange of the cooling water through the cooling tower 11 is substantially reduced.
The fire-fighting water tank system 6 comprises a fire-fighting water tank 61, an ejector 62, a fire-fighting pipe network 63 and a first liquid level sensor 64; the ejector 62 is arranged on the cooling tower water return pipe 15, the ejector 62 is used for ejecting fire-fighting water in the fire-fighting water tank 61 to be mixed with the cooling water after heat exchange, and the first liquid level sensor 64 is arranged on the inner wall of the fire-fighting water tank 61 and used for detecting the liquid level of the fire-fighting water tank 61 in real time; the lower part of the fire water tank 61 is connected with the ejector 62 through a fire water tank outlet pipe 65, and the fire water tank outlet pipe 65 is provided with a fourth electromagnetic valve 651, so that fire water in the fire water tank 61 can be ejected out to be mixed with cooling water after heat exchange when the fourth electromagnetic valve 651 is opened; the fire-fighting pipe network 63 is connected with the bottom of the fire-fighting water tank 61, so that fire can be conveniently and timely started to extinguish when a fire breaks out; a tap water replenishing pipe 66 is arranged at the upper part of the fire water tank 61, and a fifth electromagnetic valve 661 is arranged on the tap water replenishing pipe 66, so that when the fifth electromagnetic valve 661 is opened, water can be replenished into the fire water tank 61.
The rainwater collection and purification system 2 is connected with the fire water tank 61, and when the system is implemented specifically, a water source can be supplemented to the fire water tank 61 through the rainwater collection and purification system 2; the temperature sensor 5 is arranged on the cooling tower water return pipe 15 on the water outlet side of the water cooling unit 4, and the temperature sensor 5 is used for testing the temperature of cooling water flowing out of the water outlet side of the water cooling unit 4 in real time; the first electromagnetic valve 151, the second electromagnetic valve 161, the third electromagnetic valve 171, the fourth electromagnetic valve 651, the fifth electromagnetic valve 661, the variable-frequency spray water pump 13, the cooling tower 11, the cooling water pump 14, the temperature sensor 5 and the first liquid level sensor 64 are all electrically connected with the control device 3.
The rainwater collection and purification system 2 comprises a rainwater collection container 21, a rainwater delivery pump 22 and a second liquid level sensor 23; the upper part of the fire water tank 61 is connected with the rainwater collection container 21 through an overflow water pipe 24, when the water quantity of the fire water tank 61 is excessive, the excessive water can be discharged into the rainwater collection container 21 through the overflow water pipe 24, so that the water can be conveniently used when needed; the lower part of the rainwater collection container 21 is connected with the fire water tank 61 through a rainwater delivery pipe 25, the rainwater delivery pump 22 is arranged on the rainwater delivery pipe 25, and when water needs to be supplemented to the fire water tank 61 through the rainwater collection container 21, the rainwater delivery pump 22 is started; the second liquid level sensor 23 is arranged on the inner wall of the rainwater collection container 21 and is used for testing the liquid level in the rainwater collection container 21 in real time; the rainwater delivery pump 22 and the second liquid level sensor 23 are both electrically connected to the control device 3.
The spray reservoir 12 is disposed above the inside of the fire water tank 61. When the water cooling system is specifically implemented, the spray water storage tank 12 can be fixed on the inner wall of the fire water tank 61, and during operation, fire-fighting water in the fire water tank 61 can contact with the wall surface of the spray water storage tank 12 to exchange heat so as to reduce the temperature of cooling water.
An overflow drain pipe 121 is arranged at the upper part of the spraying water storage tank 12, and the overflow drain pipe 121 is arranged at a position 5cm higher than the normal liquid level of the fire water tank 61. Thus, when the amount of water in the spray reservoir 12 is large, the excess water can be discharged to the fire water tank 61 through the overflow drain pipe 121.
The water chiller 4 is installed in a machine room (not shown), and the cooling tower 11, the rainwater collection container 21, the fire water tank 61, and the control device 3 are all installed on a roof (not shown).
Referring to fig. 1 to 3, a method for controlling a cooling tower apparatus with water replenishing and scale preventing functions according to the present invention includes using the cooling tower apparatus 100; the method comprises the following steps:
step 1, setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of a fire water tank 61, testing an actual liquid level value Hx in the fire water tank 61 in real time through a first liquid level sensor 64, comparing the Hx with Hx1 and Hx2 respectively, starting to replenish water to the fire water tank 61 if the Hx is continuously detected to be less than Hx2 by the first liquid level sensor 64, and stopping replenishing water until the Hx reaches Hx 1; if the first liquid level sensor 64 continuously detects that Hx is larger than Hx1, the water elimination and prevention tank 61 is started to drain water until the water is drained until Hx reaches Hx1, and the water drainage is stopped; if Hx2 is not less than Hx1 continuously measured by the first liquid level sensor 64, water supplement and drainage are not needed;
step 2, setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water cooling unit 4, testing the outlet water temperature value t of the cooling water of the water cooling unit 4 in real time through the temperature sensor 5, comparing the t with t1 and t2 respectively, and controlling the cooling tower 11 to stop if the temperature sensor 5 continuously tests that t is less than t2, and cooling the cooling water only through heat exchange of the spraying water storage tank 12; if the temperature sensor 5 continuously detects that t is not less than t1 and is not less than t2, the water in the cooling tower 11 and the fire water tank 61 is started to carry out double cooling on the cooling water; if the temperature sensor 5 continuously detects that t is more than t1, the water in the cooling tower 11 and the fire water tank 61 is started to carry out double cooling on the cooling water;
and 3, when a fire disaster occurs, controlling the cooling tower to stop 11 through the control device 3, and controlling the rainwater collection container 21, the tap water replenishing pipe 66 and the spraying water storage tank 12 to replenish water to the fire water tank 61 at the same time.
Wherein,
referring to fig. 2, the step 1 specifically includes:
setting a water replenishing level value Hyd of the rainwater collection container 21, and testing an actual level value Hy in the rainwater collection container 21 in real time through the second liquid level sensor 23; setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of the fire water tank 61, and dividing the water level state of the fire water tank 61 into a "low water level state", a "stable water level state", and a "high water level state", testing the actual liquid level value Hx in the fire water tank 61 in real time by the first liquid level sensor 64, comparing Hx with Hx1 and Hx2, respectively, and selecting one of the following three steps to be performed according to the comparison result:
step A1, if the first liquid level sensor 64 continuously detects that Hx is less than Hx2, it indicates that the fire water tank 61 needs to be replenished with water, that is, the fire water tank 61 is in a low water level state, at this time, Hy and Hyd are compared, and if Hy is continuously detected by the second liquid level sensor 23 to be less than or equal to Hyd, the rainwater delivery pump 22 is controlled to stop by the control device 3, the fifth electromagnetic valve 661 is controlled to be opened, so that the tap water replenishing pipe 66 replenishes water to the fire water tank 61; meanwhile, when the water is supplemented until the Hx reaches the Hx1, the control device 3 controls the fifth electromagnetic valve 661 to close to finish the water supplementation, and then the step 2 is executed;
if the second liquid level sensor 23 continuously detects that Hy is larger than Hyd, the control device 3 controls the rainwater delivery pump 22 to be started, and controls the fifth electromagnetic valve 661 to be closed so as to replenish water to the waterproof box 61 through the rainwater collection container 21; meanwhile, when the water is supplemented until Hx reaches Hx1, the control device 3 controls the rainwater delivery pump 22 to be closed so as to finish the water supplementation, and then the step 2 is carried out;
step a2, if the first liquid level sensor 64 continuously detects that Hx is greater than Hx1, it indicates that the fire water tank 61 needs to be drained, that is, the fire water tank 61 is in a "high water level state", at this time, the control device 3 controls the rainwater delivery pump 22 to stop operating, controls the fifth electromagnetic valve 661 to close, so as to drain the excess water in the fire water tank 61 to the rainwater collection container 21 through the overflow water pipe 24, and stops draining until Hx reaches Hx1, and then step 2 is performed;
step A3, if the first liquid level sensor 64 continuously detects that Hx2 is not less than Hx1, it indicates that the fire water tank 61 does not need to be replenished and drained, that is, the fire water tank 61 is in a "stable water level state", at this time, the control device 3 controls the rainwater delivery pump 22 to stop, and controls the fifth electromagnetic valve 661 to close. Meanwhile, after the fire-fighting water is injected and mixed with the cooling water, the cooling water entering the spray water storage tank 12 is excessive, and the excessive water can be discharged into the fire-fighting water tank 61 through the overflow drain pipe 121 at the moment so as to ensure that the water level of the fire-fighting water tank 61 can be maintained stably, and then the step 2 is carried out.
For example, the water replenishing level value of the rainwater collection container 21 is set to 0.2 m; setting the critical value of the high liquid level of the fire-fighting water tank 61 to be 1.9m and the critical value of the low liquid level of the fire-fighting water tank to be 1.6 m;
at this time, if the first liquid level sensor 64 continuously measures Hx smaller than 1.6m and the second liquid level sensor 23 continuously measures Hy smaller than or equal to 0.2m, the control device 3 controls the tap water replenishing pipe 66 to replenish water to the waterproof tank 61, and the water replenishing is stopped until Hx is 1.9 m; if the second level sensor 23 continuously detects that Hy is greater than 0.2m, the control device 3 controls the rainwater collection container 21 to replenish the waterproof tank 61, and the water replenishment is stopped until Hx is 1.9 m;
if the first liquid level sensor 64 continuously detects that Hx is larger than 1.9m, the control device 3 controls the overflow water pipe 24 to discharge the excess water in the fire water tank 61 into the rainwater collection container 21, and the drainage is stopped until Hx is 1.9 m; if Hx is larger than or equal to 1.6m and smaller than or equal to 1.9m continuously measured by the first liquid level sensor 64, no water is drained and no water is replenished at the moment.
Referring to fig. 3, the step 2 specifically includes:
setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water-cooling unit 4, dividing the working state of the water-cooling unit 4 into a low-load working state, a medium-load working state and a high-load working state, testing the outlet water temperature value t of the cooling water of the water-cooling unit 4 in real time through a temperature sensor 5, comparing the temperature value t with t1 and t2 respectively, and selecting one of the following three steps to execute according to the comparison result:
step B1, if the temperature sensor 5 continuously detects that t is less than t2, the system is in a low-load working state, namely the water cooling unit 4 is in a low-load working state, and at the moment, the temperature sensor 5 sends a signal instruction to the control device 3; after receiving the signal instruction, the control device 3 controls the low-frequency operation of the cooling water pump 14, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be closed, controls the third electromagnetic valve 171 to be opened, and simultaneously controls the cooling tower 11 and the variable-frequency spray water pump 13 to be stopped;
the circulation of the cooling water at this time is as follows: under the low-frequency operation of the cooling water pump 14, cooling water in the spray water storage tank 12 enters the water chiller unit 4 for heat exchange, cooling water after heat exchange returns to the spray water storage tank 12 through the bypass pipe 17, meanwhile, fire-fighting water in the fire-fighting water tank 61 contacts with the wall surface of the spray water storage tank 12 for heat exchange, so that the temperature of the cooling water in the spray water storage tank 12 is reduced, and then the step 3 is carried out;
in this case, the cooling load of the water chiller 4 is low, and the amount of cooling water required is small, so that the cooling water pump 14 is operated at a low frequency. Meanwhile, under the working condition, the cooling water does not need to be cooled through the cooling tower 11, the scaling problem caused by the heat exchange of the cooling water through the cooling tower 11 can be essentially avoided, and the energy-saving function can be indirectly realized.
Step B2, if the temperature sensor 5 continuously detects that t is more than or equal to t2 and less than or equal to t1, the system is in a medium-load working state, namely the water chilling unit 4 is in a medium-load working state, and at the moment, the temperature sensor 5 sends a signal instruction to the control device 3; after receiving the signal instruction, the control device 3 controls the intermediate frequency operation of the cooling water pump 14, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be opened, controls the third electromagnetic valve 171 to be closed, and simultaneously controls the cooling tower 11 to work and controls the low frequency work of the variable frequency spray water pump 13;
the cooling water is circulated at this time as follows: under the medium-frequency operation of the cooling water pump 14, cooling water in the spraying water storage tank 12 enters the water cooling unit 4 for heat exchange, and when flowing through the ejector 62, the cooling water after heat exchange is firstly mixed with fire-fighting water ejected from the fire-fighting water tank 61 for cooling; then when the cooling water flows through the top of the cooling tower 11, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump 13 at a low frequency again for cooling; finally, cooling water enters the cooling tower 11 for cooling and flows back to the spraying water storage tank 12 through a water supply pipe 16 of the cooling tower, and then the step 3 is carried out;
in this case, the cooling load of the water chiller 4 is high, and the amount of cooling water required is large, so that the cooling water pump 14 is operated at an intermediate frequency. Under this operating mode, the cooling water after the heat transfer can carry out dual cooling through the fire water of cooling tower 11 and fire water tank 61, and under the promotion of frequency conversion spray pump 13, can make the cooling water after the heat transfer mix the cooling again in cooling tower 11 top, this helps reducing the temperature of the cooling water that gets into cooling tower 11, and the cooling water temperature is lower, and the scale inhibition rate of cooling water is just higher, and the scale deposit rate is corresponding just lower more, consequently can alleviate the scale deposit problem that produces because of the cooling water passes through cooling tower 11 heat transfer from essence. Meanwhile, because the water in the fire water tank 61 is in a flowing state at this time, the accumulation of impurities at the bottom of the fire water tank 61 can be avoided at first; secondly, under the shearing force of rivers, the incrustation scale is difficult for generating, can alleviate fire water tank 61 and lead to the incrustation scale to spread and wash inconvenient phenomenon because of long-term out of work in traditional building.
Step B3, if the temperature sensor 5 continuously detects that t is more than t1, the system is in a high-load working state, namely the water cooling unit 4 is in a high-load working state, and at the moment, the temperature sensor 5 sends a signal instruction to the control device 3; after receiving the signal instruction, the control device 3 controls the cooling water pump 14 to operate at a high frequency, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be opened, controls the third electromagnetic valve 171 to be closed, and simultaneously controls the cooling tower 11 to operate and controls the variable-frequency spray water pump 13 to operate at a high frequency;
the cooling water is circulated at this time as follows: under the high-frequency operation of the cooling water pump 14, cooling water in the spray water storage tank 12 enters the water cooling unit 4 for rapid heat exchange, and the cooling water after heat exchange is mixed with fire-fighting water which is guided out from the fire-fighting water tank 61 for cooling when flowing through the ejector 62; then when the cooling water flows through the top of the cooling tower 11, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump 13 at high frequency again for cooling; finally, cooling water enters the cooling tower 11 for cooling and flows back to the spraying water storage tank 12 through a water supply pipe 16 of the cooling tower, and then the step 3 is carried out;
since the cooling load of the water chiller 4 is high at this time and the amount of cooling water required is large, the cooling water pump 14 is operated at a high frequency. Under this operating mode, because cooling water pump 14 high frequency operation, so cooling water flow increases, and this can shorten the heat transfer time of cooling water and water chilling unit 4 to reduce the temperature behind the cooling water heat transfer, and because cooling water flow increases, consequently the flow of the fire water of jet out also increases, in order to realize better cooling effect. The cooling water after heat exchange can be cooled doubly by the fire-fighting water of the cooling tower 11 and the fire-fighting water tank 61, and under the lifting of the high-frequency operation of the variable-frequency spray pump 13, the cooling water after heat exchange can be mixed and cooled again above the cooling tower 11, so that the temperature of the cooling water entering the cooling tower 11 can be reduced, the lower the temperature of the cooling water is, the higher the scale inhibition rate of the cooling water is, and the lower the scale inhibition rate is, so that the scaling problem caused by the heat exchange of the cooling water through the cooling tower 11 can be reduced substantially. Meanwhile, at this time, since the water in the fire water tank 61 is in a fast flowing state, the accumulation of impurities at the bottom of the fire water tank 61 can be avoided; secondly, under the shearing force of rivers, the incrustation scale is difficult for generating, can alleviate fire water tank 61 and lead to the incrustation scale to spread and wash inconvenient phenomenon because of long-term out of work in traditional building.
For example, setting a high-load outlet water temperature critical value of 34 ℃ and a low-load outlet water temperature critical value of 29 ℃ of the water cooling unit 4;
at the moment, if the temperature sensor 5 continuously detects that t is less than 29 ℃, the control device 3 controls the cooling water pump 14 to operate at a low frequency, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be closed, controls the third electromagnetic valve 171 to be opened, and simultaneously controls the cooling tower 11 and the variable-frequency spray water pump 13 to be stopped;
if t is more than or equal to 29 ℃ and less than or equal to 34 ℃ continuously measured by the temperature sensor 5, the control device 3 controls the cooling water pump 14 to operate at the intermediate frequency, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be opened, controls the third electromagnetic valve 171 to be closed, and simultaneously controls the cooling tower 11 to operate and controls the variable-frequency spray water pump 13 to operate at the low frequency;
if the temperature sensor 5 continuously detects that t is more than 34 ℃, the control device 3 controls the cooling water pump 14 to operate at high frequency, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be opened, controls the third electromagnetic valve 171 to be closed, and simultaneously controls the cooling tower 11 to operate and controls the variable-frequency spray water pump 13 to operate at high frequency.
The step 3 specifically comprises the following steps:
when a fire disaster occurs, the control device 3 controls the cooling water pump 14 to operate at a high frequency, controls the first electromagnetic valve 151, the second electromagnetic valve 161 and the fourth electromagnetic valve 651 to be closed, controls the third electromagnetic valve 171 to be opened, and controls the cooling tower 11 and the variable-frequency spray water pump 13 to be stopped, so that cooling water is rapidly pumped to the spray water storage tank 12 through the cooling water pump 14, and water is supplemented to the fire water tank 61 through the overflow drain pipe 121 on the spray water storage tank 12; meanwhile, the rainwater transfer pump 22 is controlled to operate and the fifth solenoid valve 661 is controlled to be opened by the control device 3 to replenish water to the fire water tank 61 through the rainwater collection container 21 and the tap water replenishing pipe 66. Therefore, when a fire disaster occurs, sufficient water source of the fire-fighting pipe network 63 can be ensured through multi-channel water supplement, and the fire hazard is reduced.
In summary, the invention has the following beneficial effects:
1. when the system works, the working mode of the system can be adjusted in real time according to the monitored temperature change of the cooling water, so that the temperature of the cooling water after heat exchange is reduced before the cooling water enters the cooling tower, the scaling problem of the cooling tower can be reduced, the heat exchange efficiency is improved, and the operation cost is reduced; meanwhile, water in the fire water tank can be in a flowing state, so that the scaling phenomenon of the wall surface and the bottom of the fire water tank can be effectively prevented, and the energy-saving function can be indirectly realized.
2. During the in-service use, can carry out high-efficient heat transfer to the water chilling unit to ensure that the water chilling unit can high-efficient normal operation.
3. The rainwater resource that can make full use of collect carries out the moisturizing, can reduce the waste of water resource.
4. When a fire disaster happens, the fire-fighting water tank can be supplemented with water through a plurality of channels to ensure that the fire-fighting water tank has a sufficient water source, which is helpful for the smooth fire rescue work and reduces the harm caused by the fire disaster.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (7)
1. The utility model provides a cooling tower device with moisturizing and scale control function which characterized in that: the cooling tower device comprises a cooling water system, a rainwater collecting and purifying system, a control device, a water cooling unit, a temperature sensor and a fire water tank system;
the cooling water system comprises a cooling tower, a spraying water storage tank, a variable-frequency spraying water pump and a cooling water pump; the top of the cooling tower is connected with the water outlet side of the water cooling unit through a cooling tower water return pipe, and the water outlet end of the cooling tower water return pipe is provided with a first electromagnetic valve; the bottom of the cooling tower is connected with the spraying water storage tank through a cooling tower water supply pipe, and a second electromagnetic valve is arranged at the water inlet end of the cooling tower water supply pipe; the cooling tower water return pipe is connected with the cooling tower water supply pipe through a bypass pipe, and a third electromagnetic valve is arranged on the bypass pipe; the bottom of the spraying water storage tank is connected with the water inlet side of the water cooling unit through a water storage tank water outlet pipe, and the cooling water pump is arranged on the water storage tank water outlet pipe; the top of the cooling tower is also connected with the spraying water storage tank through a secondary spraying pipe, and the variable-frequency spraying water pump is arranged on the secondary spraying pipe;
the fire-fighting water tank system comprises a fire-fighting water tank, an ejector, a fire-fighting pipe network and a first liquid level sensor; the ejector is arranged on the cooling tower water return pipe, and the first liquid level sensor is arranged on the inner wall of the fire water tank; the lower part of the fire-fighting water tank is connected with the ejector through a fire-fighting water tank water outlet pipe, and a fourth electromagnetic valve is arranged on the fire-fighting water tank water outlet pipe; the fire-fighting pipe network is connected with the bottom of the fire-fighting water tank; a tap water replenishing pipe is arranged at the upper part of the fire-fighting water tank, and a fifth electromagnetic valve is arranged on the tap water replenishing pipe;
the rainwater collecting and purifying system is connected with the fire water tank; the temperature sensor is arranged on the cooling tower water return pipe on the water outlet side of the water cooling unit; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the variable-frequency spray water pump, the cooling tower, the cooling water pump, the temperature sensor and the first liquid level sensor are all electrically connected with the control device;
the rainwater collecting and purifying system comprises a rainwater collecting container, a rainwater delivery pump and a second liquid level sensor; the upper part of the fire water tank is connected with the rainwater collecting container through an overflow water pipe; the lower part of the rainwater collection container is connected with the fire water tank through a rainwater delivery pipe, and the rainwater delivery pump is arranged on the rainwater delivery pipe; the second liquid level sensor is arranged on the inner wall of the rainwater collection container; the rainwater delivery pump and the second liquid level sensor are both electrically connected with the control device;
the spraying water storage tank is arranged above the inside of the fire water tank.
2. The cooling tower apparatus with water replenishing and scale preventing functions as claimed in claim 1, wherein: the upper part of the spraying water storage tank is provided with an overflow drain pipe which is arranged at a position 5cm higher than the normal liquid level of the fire water tank.
3. The cooling tower apparatus with water replenishing and scale preventing functions as claimed in claim 1, wherein: the water cooling unit is arranged in the machine room, and the cooling tower, the rainwater collecting container, the fire water tank and the control device are all arranged on the roof.
4. A control method of a cooling tower device with water replenishing and scale preventing functions is characterized in that: the method entails using the cooling tower apparatus of any of claims 1 to 3; the method comprises the following steps:
step 1, setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of a fire water tank, testing an actual liquid level value Hx in the fire water tank in real time through a first liquid level sensor, comparing the Hx with Hx1 and Hx2 respectively, starting to replenish water to the fire water tank if the Hx is continuously measured by the first liquid level sensor to be less than Hx2, and stopping replenishing water until the Hx reaches Hx 1; if the first liquid level sensor continuously detects that Hx is larger than Hx1, starting the water-saving and water-proof tank to drain water until the water is drained until Hx reaches Hx1, and stopping draining water; if Hx is not less than Hx1 and is not more than Hx2 continuously measured by the first liquid level sensor, water replenishing and water discharging are not needed;
step 2, setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water cooling unit, testing the outlet water temperature value t of the cooling water of the water cooling unit in real time through a temperature sensor, comparing the t with t1 and t2 respectively, controlling the cooling tower to stop if the temperature sensor continuously tests that t is less than t2, and cooling the cooling water only through heat exchange of a spraying water storage tank; if the temperature sensor continuously detects that t is not less than t1 and is not more than t2, the water in the cooling tower and the fire water tank are started to carry out double cooling on the cooling water; if the temperature sensor continuously detects that t is more than t1, starting water in the cooling tower and the fire water tank to carry out double cooling on cooling water;
and 3, when a fire disaster occurs, controlling the cooling tower to stop through the control device, and controlling the rainwater collection container, the tap water replenishing pipe and the spraying water storage tank to simultaneously replenish water to the fire water tank.
5. The method for controlling a cooling tower apparatus having water replenishing and scale preventing functions according to claim 4, wherein: the step 1 specifically comprises the following steps:
setting a water replenishing level value Hyd of the rainwater collection container, and testing an actual level value Hy in the rainwater collection container in real time through a second liquid level sensor; setting a high liquid level critical value Hx1 and a low liquid level critical value Hx2 of the fire water tank, testing the actual liquid level value Hx in the fire water tank in real time through a first liquid level sensor, comparing the Hx with Hx1 and Hx2 respectively, and selecting one of the following three steps to execute according to the comparison result:
step A1, if the first liquid level sensor continuously detects that Hx is less than Hx2, it is indicated that water needs to be replenished to the fire water tank, Hy and Hyd are compared at the moment, and if Hy is continuously detected by the second liquid level sensor to be less than or equal to Hyd, the rainwater delivery pump is controlled to stop through the control device, and the fifth electromagnetic valve is controlled to be opened so as to replenish water to the fire water tank through the tap water replenishing pipe; meanwhile, when the water is supplemented until Hx reaches Hx1, the control device controls the fifth electromagnetic valve to be closed so as to finish water supplementation, and then the step 2 is carried out;
if the second liquid level sensor continuously detects that Hy is larger than Hyd, the control device controls the rainwater delivery pump to be started, and controls the fifth electromagnetic valve to be closed so as to replenish water to the waterproof box through the rainwater collection container; meanwhile, when the water is supplemented until Hx reaches Hx1, the control device controls the rainwater delivery pump to be closed so as to finish water supplementation, and then the step 2 is carried out;
step A2, if the first liquid level sensor continuously detects that Hx is larger than Hx1, the fire water tank needs to be drained, the rainwater delivery pump is controlled to stop through the control device, the fifth electromagnetic valve is controlled to be closed, so that redundant water in the fire water tank is discharged into the rainwater collection container through the overflow water pipe, the drainage is stopped until the Hx reaches Hx1, and then the step 2 is carried out;
and A3, if Hx2 is not less than Hx and not more than Hx1 are continuously measured by the first liquid level sensor, it is indicated that water replenishing and draining are not needed for the fire water tank, the rainwater delivery pump is controlled to stop through the control device, the fifth electromagnetic valve is controlled to be closed, and then the step 2 is carried out.
6. The method for controlling a cooling tower apparatus having water replenishing and scale preventing functions according to claim 4, wherein: the step 2 specifically comprises the following steps:
setting a high-load outlet water temperature critical value t1 and a low-load outlet water temperature critical value t2 of the water cooling unit, testing the outlet water temperature value t of cooling water of the water cooling unit in real time through a temperature sensor, comparing the t with t1 and t2 respectively, and selecting one of the following three steps to execute according to a comparison result:
b1, if the temperature sensor continuously detects that t is less than t2, the system is in a low-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at a low frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be closed, controls the third electromagnetic valve to be opened, and simultaneously controls the cooling tower and the variable-frequency spray water pump to stop;
the cooling water is circulated at this time as follows: under the low-frequency operation of a cooling water pump, cooling water in the spray water storage tank enters a water cooling unit for heat exchange, the cooling water after heat exchange flows through a bypass pipe and returns to the spray water storage tank, meanwhile, the fire-fighting water in the fire-fighting water tank and the wall surface of the spray water storage tank are subjected to contact heat exchange, so that the temperature of the cooling water in the spray water storage tank is reduced, and then the step 3 is carried out;
b2, if the temperature sensor continuously detects that t is more than or equal to t2 and less than or equal to t1, the system is in a medium-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at a medium frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be opened, controls the third electromagnetic valve to be closed, and simultaneously controls the cooling tower to work and controls the variable-frequency spray water pump to work at a low frequency;
the cooling water is circulated at this time as follows: under the medium-frequency operation of a cooling water pump, cooling water in a spraying water storage tank enters a water cooling unit for heat exchange, and when the cooling water after heat exchange flows through an ejector, the cooling water is mixed with fire-fighting water ejected from a fire-fighting water tank for cooling; then when the cooling water flows through the top of the cooling tower, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump at low frequency again for cooling; finally, cooling water enters the cooling tower for cooling, flows back to the spraying water storage tank through a water supply pipe of the cooling tower, and then enters the step 3;
b3, if the temperature sensor continuously detects that t is more than t1, the system is in a high-load working state, and at the moment, the temperature sensor sends a signal instruction to the control device; after receiving the signal instruction, the control device controls the cooling water pump to operate at high frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be opened, controls the third electromagnetic valve to be closed, and simultaneously controls the cooling tower to work and controls the variable-frequency spray water pump to work at high frequency;
the cooling water is circulated at this time as follows: under the high-frequency operation of a cooling water pump, cooling water in a spraying water storage tank enters a water cooling unit for rapid heat exchange, and when the cooling water after heat exchange flows through an ejector, the cooling water is firstly mixed with fire-fighting water ejected from a fire-fighting water tank for cooling; then when the cooling water flows through the top of the cooling tower, the cooling water is mixed with the cooling water pumped by the variable-frequency spray water pump at high frequency again for cooling; and finally, cooling water enters the cooling tower for cooling, flows back to the spraying water storage tank through a water supply pipe of the cooling tower, and then enters the step 3.
7. The method for controlling a cooling tower apparatus having water replenishing and scale preventing functions according to claim 4, wherein: the step 3 specifically comprises the following steps:
when a fire disaster happens, the control device controls the cooling water pump to operate at high frequency, controls the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve to be closed, controls the third electromagnetic valve to be opened, controls the cooling tower and the variable-frequency spray water pump to be stopped, so that cooling water is rapidly pumped to the spray water storage tank through the cooling water pump, and water is supplemented to the fire water tank through an overflow drain pipe on the spray water storage tank;
meanwhile, the control device controls the work of the rainwater delivery pump and controls the opening of the fifth electromagnetic valve so as to replenish water to the fire water tank through the rainwater collection container and the tap water replenishing pipe.
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| CN113701549A (en) * | 2021-09-06 | 2021-11-26 | 浙江尔格科技股份有限公司 | Energy-saving control device and control method for closed-cycle oil-water heat exchange system |
| CN114733119A (en) * | 2022-05-18 | 2022-07-12 | 新界泵业(浙江)有限公司 | Pump room and control system of integrated fire extinguishing system |
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| CN206618289U (en) * | 2017-03-28 | 2017-11-07 | 福建工程学院 | A kind of cooling tower device with moisturizing and anti-scaling function |
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| CN203586647U (en) * | 2013-12-03 | 2014-05-07 | 苏州英科工程技术服务有限公司 | Fire water tank cool storage system for chilled water system |
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