CN105716442A - Closed cooling tower and closed circulating water system - Google Patents
Closed cooling tower and closed circulating water system Download PDFInfo
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- CN105716442A CN105716442A CN201410730927.0A CN201410730927A CN105716442A CN 105716442 A CN105716442 A CN 105716442A CN 201410730927 A CN201410730927 A CN 201410730927A CN 105716442 A CN105716442 A CN 105716442A
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Abstract
The invention discloses a closed cooling tower and a closed circulating water system. The closed cooling tower comprises air inlet, a spray thrower, a heat exchange coil, a PVC heat exchange layer, a water collecting tank and an axial flow fan. The top and one side of a tower body are provided with the air inlets. The other side of the tower body is provided with an air outlet. The axial flow fan is installed at the air outlet. The heat exchange coil is arranged on the upper portion of the tower body. The spray thrower is arranged over the heat exchange coil. The PVC heat exchange layer is arranged under the heat exchange coil. The water collecting tank is arranged below the heat exchange layer and at the bottom of the tower body. The closed circulating water system adopting the closed cooling tower comprises an inner circulating part and an outer circulating part. The inner circulating part comprises the closed cooling tower and a heat exchanger. The outer circulating part comprises the closed cooling tower, the filter and a reverse osmosis device. According to the closed cooling tower and the closed circulating water system, the specific closed cooling tower and closed circulating water system are adopted, so that efficient operation of the circulating water system is ensured, the cooling ability is improved significantly, and water consumption and energy consumption are reduced more obviously.
Description
Technical field
The invention belongs to Industrial Water Saving technical field, be specifically related to a kind of closed cooling tower being applied to petroleum chemical enterprise and closed circle water system.
Background technology
The existing circulation of petroleum chemical enterprise all adopts unenclosed construction, namely traditional open cooling tower, cause fresh water consumption amount big (main manifestations is evaporation loss, air cooling tower windage loss and other filter backwash water consumption) on the one hand, the water yield of general circulation consumption accounts for the 2/3 of industrial water consumption, even more；The cooling water of open cooling tower directly contacts with air on the other hand, and not only in air, substantial amounts of impurity enters system, causes corrosive pipeline and fouling, is forced to add the chemical agents such as a large amount of antisludging agent, corrosion inhibiter, antibacterial, uneconomical but also produce secondary pollution.
Main equipment in enclosed cycle water system is closed cooling tower, is be placed in tower by pipe heat exchanger, ensures cooling-down effect by the heat exchange of the air circulated, shower water and recirculated water.Owing to being closed cycle, it ensure that water quality is not contaminated, well protects the Effec-tive Function of main equipment, improves service life.When outside air temperature is relatively low, it is possible to cut off water-spray system, play water-saving result.Reduce discharging the enforcement of policy and the day by day deficient of water resource along with national energy-saving, closed cooling tower was widely used in Ferrous Metallurgy, power electronics, machining, air conditioning system in recent years.But require higher occasion in some cooling, such as petroleum chemical enterprise's circulation, treating capacity is very big, and require that recirculated water processes to about 30 DEG C from about 40 DEG C, especially the wet bulb temperature of closely environment in summer, existing closed cooling tower cannot meet requirement, if needing to strengthen cooling capacity to be accomplished by increasing cooling tower volume, and this can be heavily influenced by the restriction of installing space and manufacturing process, secondly also to increase considerably the flow of shower water and the air quantity of blower fan, bring a great difficult problem can to the manufacturing of closed cooling tower.
CN200920083817.4 discloses a kind of closed air cooling circulation cooling water system, including technique heat exchanger and with the Circulating Pump System being connected with technique heat exchanger by circulatory mediator pipe, be additionally provided with water film type air cooler between described technique heat exchanger and Circulating Pump System.This invention arranges special water film type air cooler and improves cooling effect, adds cooling device and energy consumption.
CN201110368892.7 discloses a kind of closed cooling tower, it includes tower body, ventilation unit, spray equipment, coil pipe, captation is from top to bottom set gradually inside described tower body, weld Inlet and outlet water distribution duct at described coil pipe Inlet and outlet water two ends, this Inlet and outlet water distribution duct is separated by dividing plate.This invention adopts dividing plate to separate Inlet and outlet water distribution duct so that the cooling effect of equipment significantly improves.
CN201320311196.7 discloses a kind of closed cooling tower, including housing, blower fan, coil pipe and spray thrower, it is characterised in that: described housing side is provided with air inlet, and described assembling is in air inlet, and described case top is provided with ventilation window；Described coil pipe is arranged in housing, the hot fluid import of coil pipe upper, cold fluid outlet under；Being arranged above spray thrower at coil pipe, the housing bottom immediately below coil pipe is provided with water receiving tank, and side, described water receiving tank bottom is provided with discharge outlet, and discharge outlet is connected with the water inlet of spray thrower by spray pump and circulation line.This utility model by adding filler in housing, although extending cooling water retention time, increase heat exchange area, cooling effect improves, but due to the shower water adopted and cooling water flowing, edema due to wind pathogen is reverse, easily produce to do at tube bottom, cause fouling, make heat transfer area reduce, thus reducing heat exchange efficiency and cooling capacity.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of closed cooling tower that can be applied to petroleum chemical enterprise and closed circle water system.The present invention is by adopting specific closed cooling tower and closed circle water system, it is ensured that the Effec-tive Function of circulation, and cooling capacity is significantly improved, and saves water consumption energy consumption and becomes apparent from.
The closed cooling tower of the present invention includes air inlet, spray thrower, heat exchange coil, PVC heat exchange layers, water leg and axial flow blower, described tower body top and side arrange air inlet, described tower body opposite side arranges air outlet, axial flow blower is arranged on air outlet place, described heat exchange coil is arranged on tower body top, it is arranged above spray thrower at heat exchange coil, it is arranged below PVC heat exchange layers at heat exchange coil, water leg it is provided with bottom tower body below heat exchange layers, side, described water leg bottom is provided with discharge outlet, discharge outlet is connected with the water inlet of spray thrower by water circulating pump and pipeline.
In the present invention, described tower body top air inlet air flows through coil surface with shower water with smooth and easy, parallel and downward path, namely adopts edema due to wind pathogen design in the same direction, maintains the outer covering of pipe completely.Under this parallel type of flow, will not there is, due to the impact of air flowing, the phenomenon that separates with pipe bottom side in water, is conducive to what incrustation scale formed to do thus eliminating.Adopting edema due to wind pathogen reverse traditional design, it is easy to produce to do at tube bottom, cause fouling, make heat transfer area reduce, thus reducing heat exchange efficiency and cooling capacity more.
In the present invention, the cooling medium entrance of described heat exchange coil under, cooling medium export upper, namely recirculated cooling water flows from the bottom up, and shower water is to flow from top to bottom, carries out countercurrent heat-transfer.With traditional and compared with flowing design, adopting its log-mean temperature difference of counter-flow designs big, driving force of heat transfer is strong.It addition, the cooling effect of adverse current is better, because when counter-current operation, the outlet temperature of recirculated cooling water can be reduced to the inlet temperature (relevant with the wet bulb temperature of environment) close to shower water, and the cooling more meeting petroleum chemical enterprise's recirculated water processes；And adopting cocurrent cooling operation, the outlet temperature of recirculated cooling water can only be reduced to the outlet temperature close to shower water.In addition, as adopted and the mode that flows, the water that the hottest water of recirculated cooling water is the coldest with shower water contacts, and the temperature difference is relatively larger, is more prone to cause phase transformation and latent heat evaporation, thus fouling.The counter-flow designs that the present invention adopts and edema due to wind pathogen design in the same direction, then be allow coil portions be dispelled the heat by the sensible heat cooling effect of shower water to a greater degree, allow evaporation process concentrate on PVC heat exchange layers, contributes to reducing the probability in coil surface fouling.
In the present invention, described heat exchange coil adopts slug type tube with high flux, namely sinters a thin layer on common heat exchanger tube surface and has a porous surface heat-exchanging tube of ad hoc structure, sinterable at outer surface or inner surface.Concrete preparation method is as follows: initially with corrugated tube special-purpose machinery, light pipe is pressed into corrugated base tube, then adopts sintering processing to be coated with by the mixed metal powder of 50-300 order and installs to formation porous metals surface on corrugated base tube, namely prepares tube with high flux.The porous layer thickness of prepared corrugated tube is 0.3-0.7mm, and porosity is 30-60%, and the coefficient of heat transfer is 8-10 times of common light pipe, and it is strong that anti-salt precipitates out fouling ability, and cooling heat transferring ability significantly promotes.Further, since be limited by huge serpentine coil steelframe supporting construction and processing technology, the treating capacity monomer of common light pipe is adopted to be 500m to the maximum3About/h, and floor space is big, and adopt tube with high flux, due to its efficient exchange capability of heat, monomer maximum throughput is 1-3 times of common light pipe, and more saves floor space.
In the present invention, described axial flow blower adopts low-temperature-resistant high-efficiency energy-saving cylindrical axial flow fan, described in concrete structure such as CN200920010965.3, blade adopts nylon to add carbon fibre material one piece and completes to manufacture, blade surface has carried out water transfer process, blade can carry out angle adjustment in the axis hole of upper wheel hub and lower hub, and wheel hub adopts aluminum alloy materials integral die-cast molding, and vane airfoil profile is designed by aviation flight aspect theoretical aerodynamics principle.This axial flow blower efficiency is high, low temperature resistant, blade ice not easy to hang in winter, saves energy 10%-30% compared with similar products at home and abroad, simultaneously because the efficient exchange capability of heat of this closed cooling tower and rational edema due to wind pathogen layout, air quantity and shower water consumption save 10%-20%, and the blower fan brought and the power consumption of water pump reduce about 10% again.
In the present invention, described water leg is additionally provided with water supplement port except being provided with the discharge outlet connecting water circulating pump, is connected with shower water filling pipe.
The present invention adopts the enclosed cycle water system of above-mentioned closed cooling tower, including internal recycle and outer circulation two parts, internal recycle part includes closed cooling tower and heat exchanger, outer circulation part includes closed cooling tower, filter and reverse osmosis unit, wherein the closed cooling tower of internal recycle part refers to that circulating water flow is through heat exchange coil part, and the closed cooling tower of outer circulation part refers to shower water working portion；Described filter is for the filtration of shower water, and described reverse osmosis unit is as side line branch road, and for part shower water desalting processing, shower water is back to use shower water moisturizing after desalination.
In the present invention, the water spray of outer circulation part is the 1/25～1/2 of the internal recycle water yield, and the reverse osmosis unit treating capacity of outer circulation shower water side line accounts for the 2%～8% of the shower water water yield.The advantage taking side line reverse osmosis treatment device maximum has evaded shower water blowdown exactly, if shower water is not made directly desalting processing, then it is accomplished by blowdown, does not improve the words of cycles of concentration, blowdown flow rate needs the very big salt that could maintain to balance, and simultaneously corresponding need supplement abundant fresh water；Improving cycles of concentration, then mean that outer circulation especially coil pipe outer surface faces more scale problems, same blowdown water needs for being transported to reuse after Sewage Plant processes.In addition, directly taking the side line of shower water to carry out part reverse-osmosis treated, its cost is more much lower than direct blowdown-treatment for reuse-supplementary corresponding fresh water.
In the present invention, in wet bulb temperature relatively low late autumn or winter, it is possible to cut off outer circulation loop, rely solely on the closed cooling tower heat exchange coil in internal recycle and axial flow blower just can independent operating, reach the purpose of cooling circulating water.
In the present invention, described filter adopts efficient drift sand filter, for removing the extraneous float entering water-spray system or other impurity, it is prevented that spray thrower and line clogging.
In the present invention, the cooled tower of circulating water flow, the change of its temperature can cause the change of volume and the discharge of gas, thus sets automatic exhaust steam valve in internal recycle part, maintains the pressure balance of internal recycle part.Internal recycle part also sets water supplement port, with the moisture that deficiency system loses because of leakage problem.Described water leg, except being additionally provided with an outlet, is used for connecting reverse osmosis unit.
In the present invention, described internal recycle part not dosing, do not concentrate, not blowdown, described outer circulation does not concentrate, not blowdown, it is possible to add a small amount of preservative and antibacterial.
Compared with prior art, the method have the advantages that
1, in closed cooling tower, shower water adopts edema due to wind pathogen in the same direction with heat exchange coil air intake, makes recirculated water contact with cooling coil to greatest extent, is not easily formed and does and fouling；Shower water drops down onto PVC heat exchange layers from coil pipe, second strand of fresh air cooled down by the heat transfer process evaporated with sensible heat formula, and cooling capacity is improved significantly, and significantly reduces energy consumption；
2, the cooling medium entrance of close type cooling tower coil pipe under, cooling medium exports upper, and recirculated cooling water and shower water take the mode of countercurrent flow, and driving force of heat transfer is strong, and cooling water outlet temperature approaches wet bulb temperature more, and cooling capacity further enhances.In addition, edema due to wind pathogen is combined with counter-flow designs in the same direction, reduces the probability of coil pipe place latent heat evaporation, reduces coil surface fouling；
3, closed cooling tower adopts the many flux tubes of slug type so that the heat transfer efficiency of heat exchange coil improves 1.5-4 times, and exchange capability of heat is greatly promoted, and porous layer surface also has good scale-inhibiting properties；
4, the enclosed cycle water system including internal recycle part and outer circulation part is adopted, outer circulation part is particularly set and adopts filtration to combine with reverse osmosis shower water is processed, traditional circulating water cooling treatment has been transferred to shower water process, the process water yield is greatly lowered, and greatly reduces the scale formation of equipment.
Accompanying drawing explanation
Fig. 1 is closed cooling tower structural representation used by the present invention；
1-fresh air inlet in figure, 2-damp-heat air exports, 3-cooling medium entrance, and 4-cooling medium exports, 5-PVC heat exchange layers, 6-water leg, 7-spray thrower, 8-heat exchange coil, 9-water circulating pump, 10-PVC dehydrater, 11-axial flow blower.
Fig. 2 is the high-throughout outer wall construction of slug type that the present invention uses.
Fig. 3 is petroleum chemical enterprise of the present invention closed circle water system process chart；
12-closed cooling tower in figure, 13-heat exchanger, 14-filter, 15-reverse osmosis unit.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further elaborated.The following stated is only presently preferred embodiments of the present invention, all according to the impartial change done in the scope of the invention and modification, all should belong to the covering scope of the present invention.
Closed cooling tower as shown in Figure 1, its design specification is 50～1500m3/ h, it is not necessary to special cistern, infield is flexible.Heat exchange coil 8 can adopt conventional use of snakelike heat exchange coil, high-quality overall galvanizing process, and has high-strength anti-corrosion performance；Slug type tube with high flux is preferably used.Cooling medium entrance 3 under, cooling medium outlet is 4 upper.First, starting axial flow blower 11, fresh air enters inside closed cooling tower by two entrances 1 of tower body top and side, and the air of entrance is via after heat exchange coil and PVC heat exchange layers 5, damp-heat air exporting 2 discharges.The shower water of spray thrower 7 ejection adopts edema due to wind pathogen in the same direction with heat exchange coil 8 top air intake, makes recirculated water contact with heat exchange coil to greatest extent, is not easily formed and does and fouling.Shower water drops down onto PVC heat exchange layers 5 from heat exchange coil 8, second strand of fresh air cooled down by the heat transfer process evaporated with sensible heat formula；The shower water that damp-heat air is carried secretly can effectively be removed by PVC dehydrater 10, and that reduces shower water wafts and brims with rate.Being arranged below water leg 6 in heat exchange layers 5, side, described water leg bottom is provided with discharge outlet, and discharge outlet is connected with the water inlet of spray thrower 7 by water circulating pump 9 and pipeline.
The concrete preparation method of slug type tube with high flux is as follows: initially with corrugated tube special-purpose machinery, light pipe is pressed into corrugated base tube, then adopt sintering processing to be coated with by the mixed metal powder of 50-300 order and install to formation porous metals surface on corrugated base tube, namely prepare tube with high flux.The porous layer thickness of prepared corrugated tube is 0.3-0.7mm, and porosity is 30-60%, and the coefficient of heat transfer is 8-10 times of common light pipe.Shown in high-throughout surface texture Fig. 2 of preparation molding.
The closed circle water system of the present invention shown in Fig. 3 includes internal recycle part and outer circulation part, internal recycle part includes closed cooling tower 12 and heat exchanger 13, outer circulation part includes closed cooling tower 12, filter 14 and reverse osmosis unit 15, and wherein said internal recycle part is original circulation；The closed cooling tower of described internal recycle part refers to the circulating water flow part through coil pipe, and the closed cooling tower of described outer circulation part refers to shower water working portion, and shower water is recycled by the water pump in tower；Described filter 14 is for the filtration of shower water, it is prevented that the blocking of spray equipment, filter can adopt efficient drift sand filter；Described reverse osmosis unit 15 is as side line branch road, and for part shower water desalting processing, shower water is back to use shower water moisturizing after desalination.
Embodiment 1
Adopting the technological process shown in Fig. 3 and the closed cooling tower shown in Fig. 1, treatment scale is 600m3/ h, in the 7-8 month in summer, monthly mean temperature 26 DEG C, its, wet bulb temperature was 26.3 DEG C on daytime, and night can decrease, and cooling medium inlet temperature is 40 DEG C, the cooling medium outlet temperature that need to process 30 DEG C.Wherein the flow of shower water reaches 300m3/ h, shower water moisturizing adopts tap water, and wherein electrical conductivity is 265 μ s/cm.The reverse osmosis unit treating capacity of circulated sprinkling water side line is adjusted according to the 3% of actual shower water flow, i.e. 9m3/ h.Heat exchange coil adopts slug type tube with high flux, and the cooling medium entrance of described coil pipe under, cooling medium exports upper, and recirculated cooling water and shower water take the mode of countercurrent flow.By strengthening axial flow blower air quantity, record cooling medium outlet temperature and can be low to moderate 28.6 DEG C, approach very much wet bulb temperature, in order to maintain cooling medium outlet temperature at 30 DEG C, suitably reduce shower water flow and air quantity, namely completed by adjustment water pump and axial flow blower, evening, wet bulb temperature is lower than daytime, and its required spray flux and air quantity can be turned down further.Through the stable operation of 30 days, wherein cooling medium outlet temperature maintained about 30 DEG C, and the total rate of water make-up of shower water is about 5100m3, average rate of water make-up is 7.08m3/ h, water leg water electric conductivity is 280 μ s/cm, is a bit larger tham into water tap water electrical conductivity.(original system axial flow blower is arranged on reactor head compared with former closed circle water system, tower body both sides are air inlet, top is air outlet, heat exchange coil adopts snakelike light pipe, and the cooling medium entrance of described coil pipe is upper, cooling medium outlet under), water saving reaches 50% (light blowdown just saves 30%), economizes on electricity 35%.
Embodiment 2
Adopting the technological process shown in Fig. 3 and the closed cooling tower shown in Fig. 1, treatment scale is 600m3/ h, in October, monthly mean temperature 13.7 DEG C, its highest wet bulb temperature is 15 DEG C, and cooling medium inlet temperature is 40 DEG C, the cooling medium outlet temperature that need to process 30 DEG C.Wherein the flow of shower water is at 50-200m3Regulating within the scope of/h, shower water moisturizing adopts tap water, and wherein electrical conductivity is 247 μ s/cm.Heat exchange coil adopts slug type tube with high flux, and the cooling medium entrance of described coil pipe under, cooling medium exports upper, and recirculated cooling water and shower water take the mode of countercurrent flow.Considering that the day and night temperature of temperature is relatively big, evening, ambient temperature dropped to 2-6 DEG C, therefore can be adjusted to 50m at this time period shower water flow3About/h, adopts slug flow or trickle flow, and the more axial flow blower air quantity by adjustment closed cooling tower makes cooling medium outlet temperature maintain about 30 DEG C.The reverse osmosis unit treating capacity of circulated sprinkling water side line is adjusted according to the 4% of actual shower water flow, namely the desalting processing of shower water is strengthened than summer, because the minimizing of water spray so that heat exchange coil is not easy completely awash, this time is easier to fouling than summer.Through the stable operation of 30 days, the total rate of water make-up of shower water was about 2500m3, average rate of water make-up is 3.47m3/ h, water leg water electric conductivity is 233 μ s/cm, is slightly better than into water tap water electrical conductivity.Compared with open circulation water system (tradition cooling tower), water saving reaches 73%, economizes on electricity 30%.(former closed circle water system axial flow blower is arranged on reactor head compared with former closed circle water system, tower body both sides are air inlet, top is air outlet, heat exchange coil adopts snakelike light pipe, and the cooling medium entrance of described coil pipe is upper, cooling medium outlet under), water saving reach 35%, economize on electricity 25%.
Embodiment 3
Adopting the technological process shown in Fig. 3 and the closed cooling tower shown in Fig. 1, treatment scale is 600m3/ h, at December, monthly mean temperature-10 DEG C, water all freezes, and is left out wet bulb temperature, and cooling medium inlet temperature is 40 DEG C, the cooling medium outlet temperature that need to process 30 DEG C.Heat exchange coil adopt slug type tube with high flux, and the cooling medium entrance of described coil pipe under, cooling medium export upper.Stopping outer circulation loop, namely disable shower water, filter and reverse osmosis unit, the water in water leg is allowed to dry, the axial flow blower air quantity of an adjustment closed cooling tower makes cooling medium outlet maintain about 30 DEG C.Through the stable operation of 30 days, compared with open circulation water system (tradition cooling tower), water saving reached 98%, economizes on electricity 20%.(former closed circle water system axial flow blower is arranged on reactor head, and tower body both sides are air inlet, and top is air outlet compared with former closed circle water system, heat exchange coil adopts snakelike light pipe, and the cooling medium entrance of described coil pipe is upper, cooling medium outlet under), economize on electricity 30%.
Comparative example 1
Process technique and operating condition identical with embodiment 1, be different in that: shower water adopts edema due to wind pathogen in the same direction, but the cooling medium entrance of coil pipe is upper, cooling medium export under.Find through debugging, the hottest several hours of noon, the minimum reduction of cooling medium outlet temperature 31.5 DEG C, and be when strengthening blower fan and pump power, and dusk and night, by regulating, cooling medium outlet temperature can maintain 30 DEG C.After the operation of 30 days, the total rate of water make-up of shower water is about 5240m3, average rate of water make-up is 7.27m3/ h, more slightly higher than embodiment 1, and also the power consumption of water pump and blower fan has more 15%, and circulating cooling water outlet temperature can not be up to standard at noon every day certain time period (about 3h) simultaneously.
Comparative example 2
Processing technique and operating condition identical with embodiment 1, be different in that: cooling tower top is air outlet, both sides are air inlet, the cooling medium entrance of coil pipe under, cooling medium outlet is upper, and PVC dehydrater is between coil pipe and air outlet.Pass through debugging to find, the hottest several hours of noon, the minimum reduction of cooling medium outlet temperature 31 DEG C, and be need when strengthening blower fan and pump power, and dusk and night, by regulating, cooling medium outlet temperature can maintain 30 DEG C.After the operation of 30 days, the total rate of water make-up of shower water is about 5900m3, average rate of water make-up is 8.19m3/ h, substantially high than embodiment 1, and the power consumption of water pump and blower fan has more 20%, and especially the windage of blower fan substantially strengthens, there is slight entrainment phenomenon at air outlet place, and circulating cooling water outlet temperature can not be up to standard at noon every day certain time period (about 3h) simultaneously.
Claims (10)
1. a closed cooling tower, it is characterized in that including air inlet, spray thrower, heat exchange coil, PVC heat exchange layers, water leg and axial flow blower, described tower body top and side arrange air inlet, described tower body opposite side arranges air outlet, axial flow blower is arranged on air outlet place, described heat exchange coil is arranged on tower body top, it is arranged above spray thrower at heat exchange coil, it is arranged below PVC heat exchange layers at heat exchange coil, water leg it is provided with bottom tower body below heat exchange layers, side, described water leg bottom is provided with discharge outlet, discharge outlet is connected with the water inlet of spray thrower by water circulating pump and pipeline.
2. closed cooling tower according to claim 1, it is characterised in that: described tower body top air inlet air flows through heat exchange coil surface with shower water with smooth and easy, parallel and downward path.
3. closed cooling tower according to claim 1, it is characterised in that: the cooling medium entrance of described heat exchange coil under, cooling medium export upper.
4. closed cooling tower according to claim 1, it is characterised in that: described heat exchange coil adopts the slug type tube with high flux in common heat exchanger tube surface sintering a thin layer with ad hoc structure porous surface, is sintered in outer surface or inner surface.
5. closed cooling tower according to claim 4, it is characterized in that: the preparation method of described slug type tube with high flux is as follows: initially with corrugated tube special-purpose machinery, light pipe is pressed into corrugated base tube, then adopt sintering processing to be coated with by the mixed metal powder of 50-300 order and install to formation porous metals surface on corrugated base tube, the porous layer thickness of the tube with high flux prepared is 0.3-0.7mm, and porosity is 30-60%.
6. closed cooling tower according to claim 1, it is characterized in that: described axial flow blower adopts low-temperature-resistant high-efficiency energy-saving cylindrical axial flow fan, blade adopts nylon to add carbon fibre material one piece and completes to manufacture, blade surface has carried out water transfer process, blade can carry out angle adjustment in the axis hole of upper wheel hub and lower hub, and wheel hub adopts aluminum alloy materials integral die-cast molding.
7. adopt the enclosed cycle water system of the arbitrary described closed cooling tower of claim 1-6, it is characterized in that: include internal recycle and outer circulation two parts, internal recycle part includes closed cooling tower and heat exchanger, outer circulation part includes closed cooling tower, filter and reverse osmosis unit, wherein the closed cooling tower of internal recycle part refers to that circulating water flow is through heat exchange coil part, and the closed cooling tower of outer circulation part refers to shower water working portion；Described filter is for the filtration of shower water, and described reverse osmosis unit is as side line branch road, and for part shower water desalting processing, shower water is back to use shower water moisturizing after desalination.
8. closed circle water system according to claim 7, it is characterised in that: the water spray of outer circulation part is the 1/25～1/2 of the internal recycle water yield, and the reverse osmosis unit treating capacity of outer circulation shower water side line accounts for the 2%～8% of the shower water water yield.
9. closed circle water system according to claim 7, it is characterized in that: in wet bulb temperature relatively low late autumn or winter, cut off outer circulation loop, rely solely on the closed cooling tower heat exchange coil in internal recycle and axial flow blower just can independent operating, reach the purpose of cooling circulating water.
10. closed circle water system according to claim 7, it is characterised in that: set automatic exhaust steam valve in internal recycle part, maintain the pressure balance of internal recycle part.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107388693A (en) * | 2017-07-31 | 2017-11-24 | 河南开元空分集团有限公司 | A kind of novel energy-conserving closed circle water system |
| CN107869713A (en) * | 2017-11-24 | 2018-04-03 | 浙江巨化热电有限公司 | A kind of steam power plant's low grade residual heat reuse means and method |
| CN110921920A (en) * | 2019-12-19 | 2020-03-27 | 上海九瀚机电设备有限公司 | Closed cooling tower extrinsic cycle and integrated water treatment facilities of inner loop |
| CN112923751A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院广州能源研究所 | Side air-out vertical falling film type closed cooling tower |
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| CN107388693A (en) * | 2017-07-31 | 2017-11-24 | 河南开元空分集团有限公司 | A kind of novel energy-conserving closed circle water system |
| CN107388693B (en) * | 2017-07-31 | 2023-11-10 | 河南开元空分集团有限公司 | Energy-saving closed circulating water system |
| CN107869713A (en) * | 2017-11-24 | 2018-04-03 | 浙江巨化热电有限公司 | A kind of steam power plant's low grade residual heat reuse means and method |
| CN112923751A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院广州能源研究所 | Side air-out vertical falling film type closed cooling tower |
| CN110921920A (en) * | 2019-12-19 | 2020-03-27 | 上海九瀚机电设备有限公司 | Closed cooling tower extrinsic cycle and integrated water treatment facilities of inner loop |
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Application publication date: 20160629 |