CN210832707U - Dry-wet combined cooling circulating water system - Google Patents
Dry-wet combined cooling circulating water system Download PDFInfo
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- CN210832707U CN210832707U CN201921651382.9U CN201921651382U CN210832707U CN 210832707 U CN210832707 U CN 210832707U CN 201921651382 U CN201921651382 U CN 201921651382U CN 210832707 U CN210832707 U CN 210832707U
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Abstract
The utility model relates to the technical field of circulating water cooling, and discloses a dry-wet combined cooling circulating water system, wherein the system comprises a process medium heat exchange unit, a closed cooling tower unit, a closed circulating unit and an auxiliary refrigeration unit which are sequentially communicated; the process medium heat exchange unit is used for exchanging heat between industrial cooling water and raw coke oven gas to obtain circulating cooling water; the closed cooling tower unit is used for sequentially exchanging heat between the circulating cooling water and the regenerated cold air and water to obtain first circulating cooling water; the closed circulation unit is used for stabilizing the pressure of the first circulating cooling water, supplementing water and buffering to obtain second circulating cooling water; and the auxiliary refrigeration unit is used for exchanging heat between the second circulating cooling water and cold water to obtain the industrial cooling water. The device can realize the effects of continuous cooling of the circulating water by 20 ℃ of temperature difference, flexible cold load and low energy consumption.
Description
Technical Field
The utility model relates to a circulating water cooling technical field, concretely relates to dry and wet combination refrigeration cycle water system.
Background
At present, a circulating water cooling system comprises a natural ventilation cooling tower, a mechanical ventilation cooling tower and a mixed ventilation cooling tower according to a ventilation mode; according to the contact mode of hot water and air, there are wet cooling tower, dry-wet combined cooling tower; according to the flowing direction of hot water and air: the system comprises a counter-flow cooling tower, a cross-flow cooling tower and a mixed-flow cooling tower, wherein the cross-flow form is mainly applied to a central air conditioning system, the concurrent flow form is mainly applied to southern sultry humid areas, and the countercurrent flow form is mainly applied to northwest arid areas; there are other forms of cooling towers: jet cooling tower and cooling tower cooled by water pumped by rotary disc.
In an industrial circulating cooling water system, an open cooling tower can generally reduce the heat load of 5-10 ℃, which is difficult to achieve the requirement of reducing the temperature by 20 ℃ for a circulating water system in summer, particularly in regions with high temperature, drought and large evaporation capacity and in northwest regions, the local wet bulb temperature information is lacked, so that the design is in a situation without rice, the follow-up technical improvement is not available, and even enterprises which have just started to produce cannot meet the production cooling requirement in summer.
Therefore, a circulating water system which realizes temperature difference of continuous cooling of circulating water temperature to 20 ℃, flexible cold load and wide temperature adjusting range is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem that the circulating water that prior art exists is difficult to reach the 20 ℃ of cooling, providing a dry and wet combination refrigeration cycle water system, this system can realize that 20 ℃ of continuous cooling's difference in temperature, cold volume load are nimble and the energy consumption is low.
In order to achieve the purpose, the utility model provides a dry-wet combined cooling circulating water system, which is characterized in that the system comprises a process medium heat exchange unit, a closed cooling tower unit, a closed circulating unit and an auxiliary refrigeration unit which are sequentially communicated; the closed cooling tower unit comprises a motor and a tower body, and a fin type condensation evaporator, a spray pipe, a circular-curve bare pipe condensation evaporator and a water collecting tank are sequentially arranged in the tower body from top to bottom; the process medium heat exchange unit is used for exchanging heat between industrial cooling water and raw coke oven gas to obtain circulating cooling water; the closed cooling tower unit is used for sequentially exchanging heat between the circulating cooling water and the regenerated cold air and water to obtain first circulating cooling water; the closed circulation unit is used for stabilizing the pressure of the first circulating cooling water, supplementing water and buffering to obtain second circulating cooling water; and the auxiliary refrigeration unit is used for exchanging heat between the second circulating cooling water and cold water to obtain the industrial cooling water.
Preferably, the system further comprises: the air inlet unit, the hot air recovery unit and the purification unit are communicated with the closed cooling tower unit; the air inlet unit is used for exchanging heat between air separation regenerated gas and air in a heat exchanger to obtain the regenerated cold air; the hot gas recovery unit is used for exchanging heat of hot gas generated by the closed cooling tower unit to obtain 20-30 wt% of condensate which flows back to the water collecting tank, and the rest gas is directly discharged; the purification unit is used for circulating and purifying the water in the water collecting tank.
Preferably, the air intake unit includes: a fan, an air separation device molecular sieve and a throttle valve; the air inlet unit is used for exchanging heat between the air separation regenerated gas generated by the molecular sieve of the air separation device and the air of the fan through the throttle valve to obtain the regenerated cold air.
Preferably, the purification unit comprises: the bypass filtration system, the ultrafiltration reverse osmosis system and the sewage disposal pool are sequentially communicated with the water collecting pool, wherein the bypass filtration system is used for performing bypass filtration on water in the water collecting pool through a circulating water pump to obtain bypass filtration produced water and bypass filtration backwashing water, and the bypass filtration produced water enters the spray pipe; the ultrafiltration reverse osmosis system is used for performing ultrafiltration reverse osmosis on the side-filtration backwashing water and the sewage in the water collecting tank to obtain ultrafiltration produced water and sludge, the ultrafiltration produced water returns to the water collecting tank, and the sludge enters the sewage discharging tank.
Preferably, the purification unit further comprises: a dosing system and a water replenishing system which are communicated with the water collecting tank; the dosing system is used for adding a medicament into the water collecting tank to prevent water corrosion and microorganism breeding in the water collecting tank; and the water replenishing system is used for replenishing water to the water collecting tank.
Preferably, the motor is a variable-frequency explosion-proof motor and is used for cooling the circulating cooling water by 0.5-1 ℃; the finned condensing evaporator is used for exchanging heat between the circulating cooling water and the regenerated cold air to obtain the hot air; the circular-curve condensation evaporation pipe is used for exchanging heat between the circulating cooling water and the water of the spray pipe to obtain first circulating cooling water and the hot gas.
Preferably, the closed cycle unit includes: the system comprises a water replenishing buffer tank, a variable-frequency circulating water pump, a water replenishing pipe and an anti-freezing liquid pipe; the antifreezing liquid pipe is used for adding antifreezing liquid into the water supplementing buffer tank to prevent the second circulating cooling water from freezing; the water supplementing buffer tank is used for stabilizing, supplementing and buffering the first circulating cooling water to obtain second circulating cooling water; and the second circulating cooling water enters the auxiliary refrigeration unit through the variable-frequency circulating water pump.
Preferably, the auxiliary cooling unit comprises: a circulating water heat exchange system, a water chiller system and a cooling tower system; the circulating water heat exchange system is used for exchanging heat between the second circulating cooling water and cold water inlet water to obtain industrial cooling water and cold water outlet water, and the industrial cooling water returns to the process medium heat exchange unit; the cooling tower system is used for enabling the cooling water to enter the second water tank to become condensation water and exchange heat with the cooling tower, condensation water is obtained, and the condensation water enters the first water tank to become the cooling water.
Preferably, the auxiliary cooling unit comprises: a circulating water heat exchange unit and a water chiller refrigerating unit.
Preferably, the auxiliary cooling unit is an air conditioning cooling unit.
Through the technical scheme, the utility model provides a dry wet combination cooling circulation water system can realize that the circulating water continues to cool down and reaches 20 ℃ the difference in temperature, cold volume load flexibility and energy consumption are low.
Drawings
Figure 1 is the utility model provides a dry and wet combination refrigeration cycle water system.
Description of the reference numerals
1. Process medium heat exchange unit 2, closed cooling tower unit 3 and air inlet unit
4. Hot gas recovery unit 5, purification unit 6, closed cycle unit
7. Auxiliary refrigeration unit 11, process medium 12 and industrial cooling water
13. Circulating cooling water 14, first circulating cooling water 15 and second circulating cooling water
21. Motor 22, water collecting tank 31, air separation regenerated gas
32. Air 33, regenerated cold air 34, heat exchanger
35. Air separation plant molecular sieve 36, choke valve 37, fan
51. Side filtering system 52, ultrafiltration reverse osmosis system 53 and sewage tank
54. Medicine system 55, water charging system 61, moisturizing buffer tank
62. Frequency conversion circulating water pump 63, moisturizing pipe 64, antifreeze liquid pipe
71. Circulating water heat exchange system 72, water chiller system 73 and cooling tower system
74. First water tank 75, second water tank 76, cold water inlet
77. Cold water outlet 78, cooling inlet 79 and cooling outlet
80. Condensed water 81 and condensed water
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The utility model provides a dry-wet combined cooling circulating water system, as shown in figure 1, wherein the system comprises a process medium heat exchange unit 1, a closed cooling tower unit 2, a closed circulating unit 6 and an auxiliary refrigeration unit 7 which are sequentially communicated; the closed cooling tower unit comprises a motor 21 and a tower body, and a fin type condensation evaporator, a spray pipe, a circular-curve bare pipe condensation evaporator and a water collecting tank 22 are sequentially arranged in the tower body from top to bottom; the process medium heat exchange unit 1 is used for exchanging heat between industrial cooling water 12 and a process medium 11 to obtain circulating cooling water 13; the closed cooling tower unit 2 is used for sequentially exchanging heat between the circulating cooling water 13 and the regenerated cold air 33 and water to obtain first circulating cooling water 14; the closed circulation unit 6 is used for stabilizing the pressure, replenishing water and buffering the first circulating cooling water 14 to obtain second circulating cooling water 15; the auxiliary refrigeration unit 7 is configured to exchange heat between the second circulating cooling water 15 and cold water to obtain the industrial cooling water 12.
According to the present invention, preferably, the system further comprises: the air inlet unit 3, the hot air recovery unit 4 and the purification unit 5 are communicated with the closed cooling tower unit 2; the air inlet unit 3 is used for exchanging heat between air separation regeneration gas 31 and air 32 in a heat exchanger 34 to obtain the regeneration cold air 33; the hot gas recovery unit 4 is used for exchanging heat of the hot gas generated by the closed cooling tower unit 2 to obtain 20-30 wt% of condensate which flows back to the water collecting tank 22, and the rest gas is directly discharged; the purification unit 5 is used for circulating and purifying the water in the water collecting tank 22.
According to the present invention, preferably, the air inlet unit 3 includes: an air separation unit molecular sieve 35, a throttle valve 36 and a fan 37; the air inlet unit 3 is configured to exchange heat between the air separation regenerated gas 31 generated by the molecular sieve 35 of the air separation plant and the air 32 of the fan 37 through the throttle valve 36 to obtain the regenerated cold air 33.
According to the present invention, preferably, the purification unit 5 comprises: a side filtration system 51, an ultrafiltration reverse osmosis system 52 and a blowdown tank 53 which are sequentially communicated with the water collecting tank 22; the side filtering system 51 is configured to perform side filtering on the water in the water collecting tank 22 by using a circulating water pump to obtain side filtering produced water and side filtering backwash water, and the side filtering produced water enters the spray pipe; the ultrafiltration reverse osmosis system 52 is configured to perform ultrafiltration reverse osmosis on the side-filtration backwashing water and the sewage in the water collection tank 22 to obtain ultrafiltration product water and sludge, the ultrafiltration product water returns to the water collection tank 22, and the sludge enters the sewage discharge tank 53.
According to the present invention, preferably, the purification unit 5 further comprises: a dosing system 54 and a water supplementing system 55 which are communicated with the water collecting tank; wherein the dosing system 54 is configured to add a chemical to the sump 22 to prevent water corrosion and microbial growth in the sump; the water replenishing system 55 is used for replenishing water to the water collecting tank 22.
According to the utility model, preferably, the motor 21 is a variable frequency explosion-proof motor, and is used for cooling the circulating cooling water 13 by 0.5-1 ℃; the finned condensing evaporator is used for exchanging heat between the circulating cooling water 13 and the regenerated cold air 33 to obtain the hot air; the circular-curve condensation evaporation pipe is used for exchanging heat between the circulating cooling water 13 and the water of the spray pipe to obtain first circulating cooling water 14 and the hot gas.
According to the present invention, preferably, the closed circulation unit 6 includes: a water supplementing buffer tank 61, a variable-frequency circulating water pump 62, a water supplementing pipe 63 and an antifreezing liquid pipe 64; the antifreezing solution pipe 64 is used for adding an antifreezing solution into the water supplementing buffer tank 61 to prevent the second circulating cooling water 15 from freezing; the water replenishing buffer tank 61 is used for stabilizing the pressure of the first circulating cooling water 14, replenishing water and buffering to obtain second circulating cooling water 15; the second circulating cooling water 15 enters the auxiliary refrigeration unit 7 through the variable frequency circulating water pump 62.
According to the present invention, preferably, an anti-freezing solution is added into the water replenishing buffer tank 61, and the anti-freezing solution is selected from at least one of calcium chloride, ethylene glycol, glycerol and ethanol, preferably ethylene glycol.
According to the present invention, preferably, the auxiliary cooling unit 7 comprises: a circulating water heat exchange system 71, a water chiller system 72 and a cooling tower system 73; the circulating water heat exchange system 71 is configured to exchange heat between the second circulating cooling water 15 and a cold water inlet 76 to obtain the industrial cooling water 12 and a cold water outlet 77, and the industrial cooling water 12 returns to the process medium heat exchange unit 1; the water chiller system 72 is configured to exchange heat between the cold water outlet 77 and the cooling inlet 78 to obtain a cold water inlet 76 and a cooling outlet 79; the cooling tower system 73 is configured to change the cooling water outlet 79 into condensed water 80 in the second water tank 75 to exchange heat with the cooling tower, so as to obtain condensed water 81, and the condensed water 81 enters the first water tank 74 to become the cooling water inlet 78.
According to the present invention, preferably, the temperature of the cold water inlet 76 is 7 ℃, and the temperature of the cold water outlet 77 is 12 ℃.
According to the utility model discloses, preferably, the cooling intake 78 with the temperature of condensate return 81 is 30 ℃, the cooling outlet 79 with the temperature of condensate intake 80 is 35 ℃.
According to the present invention, preferably, the temperature of the industrial cooling water 12 is 22 ℃, the temperature of the circulating cooling water 13 is 42 ℃, and the temperature of the first circulating cooling water 14 and the second circulating cooling water 15 is 32 ℃.
According to the present invention, preferably, the auxiliary cooling unit 7 comprises: a circulating water heat exchange unit and an ammonia refrigeration unit.
According to the present invention, preferably, the auxiliary cooling unit 7 is an air conditioner cooling unit.
The operation of the process for carrying out the combined wet and dry cooling cycle water system is described below in conjunction with the system of fig. 1 provided by the present invention.
The water collecting tank in the closed cooling tower is designed to be 1200m by the spraying water amount of a pump3H, maintaining the concentration multiple of the water collecting tank to be 5, and designing the discharge capacity of the water collecting tank to be 8m3H, side filtration water of 60m3The amount of side-filtration backwashing water is 15m3H, for water-saving purpose, 23m3The/h discharged water enters an ultrafiltration and reverse osmosis recycling system, and the total produced water is recycled to be 8m according to the total water recovery rate of 63 percent3H, producing 7m of concentrated water3The water supply total amount of a circulating water system is designed to be 39m3/h。
The motor in the closed cooling tower unit adopts an explosion-proof motor 21 and carbon fiber fan blades, the air inlet adopts regenerated cold air 33 obtained by exchanging heat between air separation regenerated gas 31 generated by a molecular sieve 35 of an air separation device and air 32 generated by a fan 37 through a throttle valve 36, and the temperature of circulating cooling water can be reduced by 0.5-1.0 ℃ by utilizing the regenerated cold air, so that energy utilization, energy saving and consumption reduction are realized.
The auxiliary cold regulating unit 7 is formed by combining 10 groups of water chiller systems 72 in parallel, each group is 10% of cold load, the auxiliary cold regulating unit runs at full load in high-temperature weather in summer, the proportional refrigerating capacity can be used as the temperature regulating cold of softened water in other spring and autumn, and the temperature of the mixed softened water is ensured to be 22 ℃ by partially proportionally crossing the line. Each water chiller does work through a compressor, cold water outlet 77 at 12 ℃ is condensed into cold water inlet 76 at 7 ℃ in the water chiller, cooling inlet 78 of the water chiller at 30 ℃ exchanges heat in the water chiller to obtain cold outlet 79 at 35 ℃, the cold outlet enters the second water tank 75 to serve as condensation inlet 80, in order to cool the condensation inlet at 35 ℃ to the condensation outlet at 30 ℃, the condensation inlet at 35 ℃ in the second water tank 75 is pumped to a cooling tower to be cooled, the condensation inlet can be air-cooled or water-drenching type, the obtained condensation return water at 30 ℃ enters the first water tank 74 to serve as the cooling inlet 78, the temperature of the cooling inlet of the water chiller is ensured to be at 30 ℃, the cold water inlet 76 of the water chiller exchanges heat with the circulating water heat exchange system 71 to be heated to 12 ℃ and returns to the water chiller to be cooled to 7 ℃.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. In the technical idea scope of the present invention, it can be right to the technical solution of the present invention perform multiple simple modifications, including each technical feature combined in any other suitable manner, these simple modifications and combinations should be regarded as the disclosed content of the present invention, and all belong to the protection scope of the present invention.
Claims (10)
1. A dry-wet combined cooling circulating water system is characterized by comprising a process medium heat exchange unit, a closed cooling tower unit, a closed circulating unit and an auxiliary refrigeration unit which are sequentially communicated;
the closed cooling tower unit comprises a motor and a tower body, and a fin type condensation evaporator, a spray pipe, a circular-curve bare pipe condensation evaporator and a water collecting tank are sequentially arranged in the tower body from top to bottom;
the process medium heat exchange unit is used for exchanging heat between industrial cooling water and a process medium to obtain circulating cooling water;
the closed cooling tower unit is used for sequentially exchanging heat between the circulating cooling water and the regenerated cold air and water to obtain first circulating cooling water;
the closed circulation unit is used for stabilizing the pressure of the first circulating cooling water, supplementing water and buffering to obtain second circulating cooling water;
and the auxiliary refrigeration unit is used for exchanging heat between the second circulating cooling water and cold water to obtain the industrial cooling water.
2. The system of claim 1, further comprising: the air inlet unit, the hot air recovery unit and the purification unit are communicated with the closed cooling tower unit;
the air inlet unit is used for exchanging heat between air separation regenerated gas and air in a heat exchanger to obtain the regenerated cold air;
the hot gas recovery unit is used for exchanging heat of hot gas generated by the closed cooling tower unit to obtain 20-30 wt% of condensate which flows back to the water collecting tank, and the rest gas is directly discharged;
the purification unit is used for circulating and purifying the water in the water collecting tank.
3. The system of claim 2, wherein the air intake unit comprises: the air separation device comprises a molecular sieve, a throttle valve and a fan;
the air inlet unit is used for exchanging heat between the air separation regenerated gas generated by the molecular sieve of the air separation device and the air of the fan through the throttle valve to obtain the regenerated cold air.
4. The system of claim 2, wherein the purification unit comprises: the side filtering system, the ultrafiltration reverse osmosis system and the sewage disposal pool are sequentially communicated with the water collecting pool;
the side filtering system is used for side filtering the water in the water collecting tank through a circulating water pump to obtain side filtering produced water and side filtering backwashing water, and the side filtering produced water enters the spray pipe;
the ultrafiltration reverse osmosis system is used for performing ultrafiltration reverse osmosis on the side-filtration backwashing water and the sewage in the water collecting tank to obtain ultrafiltration produced water and sludge, the ultrafiltration produced water returns to the water collecting tank, and the sludge enters the sewage discharging tank.
5. The system of claim 2, wherein the purification unit further comprises: a dosing system and a water replenishing system which are communicated with the water collecting tank;
the dosing system is used for adding a medicament into the water collecting tank to prevent water corrosion and microorganism breeding in the water collecting tank;
and the water replenishing system is used for replenishing water to the water collecting tank.
6. The system according to claim 2, wherein the motor is a variable frequency explosion-proof motor for cooling the circulating cooling water by 0.5-1 ℃;
the finned condensing evaporator is used for exchanging heat between the circulating cooling water and the regenerated cold air to obtain the hot air;
the circular-curve condensation evaporation pipe is used for exchanging heat between the circulating cooling water and the water of the spray pipe to obtain first circulating cooling water and the hot gas.
7. The system of claim 1, wherein the closed cycle unit comprises: the system comprises a water replenishing buffer tank, a variable-frequency circulating water pump, a water replenishing pipe and an anti-freezing liquid pipe;
the antifreezing liquid pipe is used for adding antifreezing liquid into the water supplementing buffer tank to prevent the second circulating cooling water from freezing;
the water supplementing buffer tank is used for stabilizing, supplementing and buffering the first circulating cooling water to obtain second circulating cooling water;
and the second circulating cooling water enters the auxiliary refrigeration unit through the variable-frequency circulating water pump.
8. The system of claim 1, wherein the auxiliary refrigeration unit comprises: a circulating water heat exchange system, a water chiller system and a cooling tower system;
the circulating water heat exchange system is used for exchanging heat between the second circulating cooling water and cold water inlet water to obtain industrial cooling water and cold water outlet water, and the industrial cooling water returns to the process medium heat exchange unit;
the water chiller system is used for exchanging heat between the cold water outlet and the cooling inlet to obtain cold water inlet and cooling outlet;
the cooling tower system is used for enabling the cooling water to enter the second water tank to become condensation water and exchange heat with the cooling tower, condensation water is obtained, and the condensation water enters the first water tank to become the cooling water.
9. The system of claim 1, wherein the auxiliary refrigeration unit comprises: a circulating water heat exchange unit and a water chiller refrigerating unit.
10. The system of claim 1, wherein the auxiliary refrigeration unit is an air conditioning cooling unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921651382.9U CN210832707U (en) | 2019-09-29 | 2019-09-29 | Dry-wet combined cooling circulating water system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921651382.9U CN210832707U (en) | 2019-09-29 | 2019-09-29 | Dry-wet combined cooling circulating water system |
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| CN210832707U true CN210832707U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116592536A (en) * | 2023-06-09 | 2023-08-15 | 森创中汇(北京)热电科技有限公司 | Dual-cycle refrigerating and heating system |
-
2019
- 2019-09-29 CN CN201921651382.9U patent/CN210832707U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116592536A (en) * | 2023-06-09 | 2023-08-15 | 森创中汇(北京)热电科技有限公司 | Dual-cycle refrigerating and heating system |
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