CN104474853B - Compressed air concentrates spraying cooling drying system - Google Patents
Compressed air concentrates spraying cooling drying system Download PDFInfo
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- CN104474853B CN104474853B CN201410774932.1A CN201410774932A CN104474853B CN 104474853 B CN104474853 B CN 104474853B CN 201410774932 A CN201410774932 A CN 201410774932A CN 104474853 B CN104474853 B CN 104474853B
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Abstract
The invention discloses a kind of compressed air and concentrate spraying cooling drying system, the top outlet of air cooling compressor connects end recuperator entrance, end recuperator is connected with the outlet of air compressor machine and connects air cooling compressor lower inlet by the first valve, another outlet of end recuperator connects compressed air pipe network, in air cooling compressor, lower end is provided with screen pack, the outlet of its lower end connects water-cooling tower by level control valve, water-cooling tower connects water pump by the second valve, water pump connects the entrance of hypomere shower nozzle and refrigerator respectively by the 3rd valve, the outlet of refrigerator connects the entrance of epimere shower nozzle.Air compressor machine outlet high-temperature gas of the present invention directly enters the cold tower cooler of air, and air compressor machine exit gas resistance reduces; Energy consumption of compressor also can reduce simultaneously; Spraying cooling is that air water directly contacts, and can wash away the impurity in air, makes compressed air more clean, improves equipment Operating ettectiveness.
Description
Technical field
The present invention relates to a kind of compressed air and dehydrate technology, specifically relate to compressed air and concentrate spraying cooling drying system.
Background technology
In the industry such as iron and steel, weaving, compressed air is widely used as a kind of energy medium, as: as operated pneumatic valve instrument air, power gas source, cooling source of the gas, source purge gas etc., almost relate to each link in production.User is different, requires different to source of the gas aridity, but most of occasion all requires that namely relative humidity is less than 60%, can satisfy the demands completely not containing visible moisture in source of the gas.
Current compressed air drying technique mostly adopts absorption or freezing mode, and also to have after first being lowered the temperature by refrigerator suction type again, drying facility is generally arranged in each compressed air supply station, also has each user to put to arrange voluntarily drying device.Absorber generally arranges two, is used alternatingly.That is: an absorber in use, when the molecular sieve water suction in absorber reaches capacity, can not continue absorption, be now switched to another absorber and work on the moisture in compressed air.By bypass pipe, source of the gas dry after absorber is introduced pending absorber simultaneously, by micro-heating system, make the adsorbed water on molecular sieve turn back in the compressed air be filled with, emptying, make regenerating molecular sieve.Dry source of the gas after coming from absorber owing to making the gas of regenerating molecular sieve.This drying mode, maximum shortcoming is that operating cost is too high, only regenerating molecular sieve gas diffuse that just accounts for a total air demand 8%.If with certain steel mill air demand 45000Nm
3/ h, pressure is the air compression station of 0.7MPa is example, and the total tolerance every year for adsorber regeneration is 3,000 ten thousand M
3, by unit consumption 0.115KWh/M
3measuring and calculating, the power consumption of a year reaches 2,300,000 yuan, adds electric heater 480kw, annual cost 2800000 yuan, and annual also have consumption 100,000 yuan, adsorbent, then the operating cost that this air compression station is total reaches 5,200,000 yuan (electricity price calculates by 0.67 yuan/kwh).Annual output reaches the iron and steel enterprise of 1,000 ten thousand tons, and compressed air consumption reaches 150,000 NM
3/ h, needs dry process by 70%, then need the air amount of dry process to reach 100,000 NM
3/ h, then the compressed air drying disposal cost of whole steel mill reaches 1,000 ten thousand yuan/year.
Absorption type compressed air drying device operating cost is too high, annoyings iron and steel enterprise always.By visiting Duo Jia iron and steel enterprise, all there is Similar Problems, not changing technique cannot fundamentally save energy and reduce the cost, and reduces operating cost.
Summary of the invention
The present invention is directed to absorption type compressed air drying device energy consumption large, the problem that operating cost is too high, designs a kind of energy-saving compressed air and concentrates spraying cooling drying device, carry out cool drying, reduce costs compressed air, improves equipment Operating ettectiveness.
The present invention for achieving the above object, the technical scheme adopted is: compressed air concentrates spraying cooling drying system, comprise the epimere shower nozzle in air cooling compressor and air cooling compressor and hypomere shower nozzle, the top outlet of described air cooling compressor connects end recuperator entrance, end recuperator is connected with the outlet of air compressor machine and connects air cooling compressor lower inlet by the first valve, another outlet of end recuperator connects compressed air pipe network, in air cooling compressor, lower end is provided with screen pack, the outlet of its lower end connects water-cooling tower by level control valve, water-cooling tower connects water pump by the second valve, water pump connects the entrance of hypomere shower nozzle and refrigerator respectively by the 3rd valve, the outlet of refrigerator connects the entrance of epimere shower nozzle.
The top outlet compressed air temperature of described air cooling compressor is 10 DEG C ~ 32 DEG C.
Described end recuperator heated compressed air enters pipe network after 30 DEG C ~ 38 DEG C.
The temperature of the entrance cooling water of described epimere shower nozzle is 8 DEG C ~ 20 DEG C.
The temperature of the entrance cooling water of described hypomere shower nozzle is 25 DEG C ~ 32 DEG C.
Described Air flow tower top is provided with stainless steel cloth mist eliminator.
Described water-cooled tower top is provided with mist eliminator and water-locator.
Advantage of the present invention: air concentrates spraying cooling, can cancel final compressor cooler, and air compressor machine outlet high-temperature gas directly enters the cold tower cooler of air, and air compressor machine exit gas resistance reduces.Former adsorption dehumifier resistance is up to 50kPa, and after adopting energy-saving compressed air to concentrate spraying cooling drying device, within resistance can be reduced to 10kPa, resistance drop low compression function consumption also can reduce, and improves equipment Operating ettectiveness.Spraying cooling is that air water directly contacts, and can wash away the impurity in air, makes compressed air more clean.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that compressed air of the present invention concentrates spraying cooling drying system.
In figure: 1. end recuperator, 2. air cooling compressor, 3. water pump, 4. refrigerator, 5. epimere shower nozzle, 6. hypomere shower nozzle, 7. level control valve, 8. air compressor machine, 9. compressed air pipe network, 10. water-cooling tower, 11. first valves, 12. second valves, 13. the 3rd valves.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.See Fig. 1, compressed air concentrates spraying cooling drying system, comprise the epimere shower nozzle 5 in air cooling compressor 2 and air cooling compressor 2 and hypomere shower nozzle 6, the top outlet of described air cooling compressor 2 connects end recuperator 1 entrance, end recuperator 1 is connected with the outlet of air compressor machine 8 and connects air cooling compressor 2 lower inlet by the first valve 11, another outlet of end recuperator 1 connects compressed air pipe network 9, in air cooling compressor 2, lower end is provided with screen pack, the outlet of its lower end connects water-cooling tower 10 by level control valve 7, water-cooling tower 10 connects water pump 3 by the second valve 12, water pump 3 connects the entrance of hypomere shower nozzle 6 and refrigerator 4 respectively by the 3rd valve 13, the outlet of refrigerator 4 connects the entrance of epimere shower nozzle 5.The top outlet compressed air temperature of described air cooling compressor 2 is 10 DEG C ~ 32 DEG C.Described end recuperator 1 heated compressed air enters pipe network after 30 DEG C ~ 38 DEG C.The temperature of the entrance cooling water of described epimere shower nozzle 5 is 8 DEG C ~ 20 DEG C.The temperature of the entrance cooling water of described hypomere shower nozzle 6 is 25 DEG C ~ 32 DEG C.Described air cooling compressor 2 top is provided with stainless steel cloth mist eliminator.Described water-cooling tower 10 top is provided with mist eliminator and water-locator.
embodiment:the course of work of the present invention is as follows: air air compressor machine 8 being exported more than 100 DEG C directly introduces air cooling compressor 2, flows from the bottom up.Cooling water sprays from top to bottom.Gas and water reverse flow, fully contacted by filler, and the compressed air of rising, according to being cooled to 10 DEG C ~ 32 DEG C season, is specially: winter: 10 DEG C ~ 15 DEG C, Optimal Control 12 DEG C; Summer: 25 DEG C ~ 32 DEG C, Optimal Control 28 DEG C; Spring and autumn: 15 DEG C ~ 25 DEG C, Optimal Control 20 DEG C, then from air cooling compressor 2 Base top contact, and after being heated to 30 DEG C ~ 38 DEG C season, enter pipe network by end recuperator 1.Compressed air enters pipe network temperature and can control uninterrupted by the first valve 11 and regulate.Cooling moisture two sections, epimere cooling water is introduced into refrigerator 4 and enters air cooling compressor 2 top after being reduced to 8 DEG C ~ 20 DEG C season, is sprayed by epimere shower nozzle 5; Directly spraying cooling is carried out by the hypomere shower nozzle 6 of air cooling compressor 2 by 25 DEG C ~ 32 DEG C normal-temperature water in the middle part of air cooling compressor 2.The condensed water formed after Air flow and two sections shower water collect in air cooling compressor 2 bottom, utilize the pressure of self, by level control valve 7, hydraulic pressure is got back to cooling circulating water system, after water-cooling tower 10 is cooled to 25 DEG C ~ 32 DEG C, is pressurizeed by water pump 3 and participate in the cooling of air cooling compressor 2.Compressed air, after air cooling compressor 2 spraying cooling, is saturation state.The water capacity of compressed air in 24 DEG C of situations is 21g/m
3, after re-heat, the saturation of the air water capacity of 35 DEG C ~ 38 DEG C can reach 38g/m
3, thus compressed-air actuated relative humidity 55% after re-heat can be calculated.When such compressed air enters pipe network, be unsaturated state, not having can water breakthrough, and compressed air obtains drying.Known air humidity along with season environment temperature change and change, air cooling compressor 2 outlet air temperature also synchronously changes, and temperature is lower, and water capacity is less, and the compressed air relative humidity after end recuperator 1 is less, is more not easy to separate out free water.
In the present invention: end recuperator 1, for heating from air cooling compressor 2 compressed air out, is used for reducing relative humidity.Air cooling compressor 2 is for the compressed air of Water spray cooling flowing from the bottom up.Water pump 3 is for promoting hydraulic pressure.Refrigerator 4 is for cooling normal-temperature water.Level control valve 7 bottom air cooling compressor 2 regulates for water level bottom air cooling compressor 2, by this valve, the condensed water of air cooling compressor 2 bottom collection is pushed back water-cooling tower 10.
The present invention is combined with existing air-separating oxygen-making equipment and resource can obtain better economic effect.Extraneous to supply water through water pump 3(numbering WP-1101 or WP-1102) after supercharging, the middle part entering air cooling compressor 2 (numbering AC1101) and air turbine compressor unit 8 send into making adverse current containing damp-heat air (temperature≤105 DEG C) and directly contacting of air cooling compressor 2 bottom, and air is tentatively cooled.Meanwhile, can NO soluble in water in the dust in rinse air and air
2, SO
2,cL
2,hF etc., to after the material of the toxic effect of molecular sieve, discharge native system from air cooling compressor 2 end automatically through V1161, V1162, V1163, V1165 valve.Air rises to the epimere of tower, and makes further caloic through the chilled water (6 DEG C ~ 15 DEG C) that handpiece Water Chilling Units is lowered the temperature further exchange from water-cooling tower 10 (numbering WC1101).Air is cooled to 17 DEG C and goes out air cooling compressor 2, enters end recuperator 1.Extraneous water supply (water temperature 25 DEG C ~ 32 DEG C), flow into through the top of water-locator from water-cooling tower 10, after being cooled by the residue low temperature nitrogen that air separation equipment brings in water-cooling tower 10, water temperature is down to 15 DEG C ~ 21 DEG C, flow out from the bottom of air cooling compressor 2, by water pump 3(numbering WP1103 or WP1104) supercharging, be cooled to 6 DEG C ~ 15 DEG C through refrigerator 4 further, send into the epimere of air cooling compressor 2.After this road water at low temperature and air carry out caloic exchange, flow directly into the hypomere of air cooling compressor 2.
Air cooling compressor 2 is packing type cooling tower, brings vaporific free water into follow-up system when going out air cooling compressor 2 to prevent air, and air cooling compressor 2 top is provided with stainless steel cloth mist eliminator.Be packing section in the middle part of air cooling compressor 2, be divided into upper and lower two sections.The epimere (namely cold section) of air cooling compressor 2 is equipped with diameter 50mm, high 50mm, the enhanced polypropylene ring of wall thickness 1.5mm, the hypomere filler of air cooling compressor 2 divides two-layer dress, and the diameter 100mm of 1 meter high is equipped with in bottom, high 100mm, the stainless steel ring of wall thickness 1.0mm, that then load is 3 meters high diameter 100mm, the enhanced polypropylene ring of high 100mm, wall thickness 2.6mm.Water-locator is respectively equipped with at air cooling compressor 2 internal upper part and water inlet position, middle part.During normal operation, a road water at low temperature is by epimere shower nozzle 5(top water-locator) spray at epimere filler top equably, flow to hypomere filler along filler space; Another road normal-temperature water passes through hypomere shower nozzle 6(bottom water-locator in the middle part of air cooling compressor 2) spray at the top of hypomere filler equably, then two strands of water flow to air cooling compressor 2 end through hypomere filler space after converging together, then are discharged to outside air cooling compressor 2.From air compressor machine 8 high temperature air (temperature≤105 DEG C) by air cooling compressor 2 bottom to enter after in air cooling compressor 2 against the current stream and on, caloic exchange is carried out with normal temperature and water at low temperature, go out air cooling compressor 2 through stainless steel cloth mist eliminator again, enter end recuperator 1.
Water-cooling tower 10 is packed towers, high 22 meters.Water-cooling tower 10 top is provided with mist eliminator and water-locator, plain edition diameter 65mm, high 65mm, the polypropylene filler of wall thickness 1.5mm divides in two-layer loading water-cooling tower 10, redistributor is provided with in the centre of two packing layers, water is uniformly distributed all the time in packing layer, thus improves the cooling effectiveness of water-cooling tower 10.The normal-temperature water of extraneous 25 DEG C ~ 32 DEG C enters in water-cooling tower 10 from the water-locator on water-cooling tower 10 top, flowed out by the bottom of water-cooling tower 10, dirt (pure) nitrogen of 10 DEG C ~ 20 DEG C enters being water-cooled to 15 DEG C ~ 21 DEG C in water-cooling tower 10 from 2.5 meters, the bottom of water-cooling tower 10, dirty (pure) nitrogen pushes up to water-cooling tower 10 and directly enters air through stainless steel cloth mist eliminator.In order to not make water completely enter in nitrogen tube, except being provided with level control instrument off-balancesheet, being also provided with overflow pipe, when water completely arrives close to 2.5 meters of height, overflowing in the overflow pipe of water just from nitrogen tube, can not general enter in nitrogen tube.When going out tower for preventing nitrogen, vaporific water droplet being taken away, increasing water consumption, at the top of water-cooling tower 10, being provided with stainless steel cloth mist eliminator.
Water pump 3: adopt centrifugal water pump, totally two groups, often organizes two, the using and the reserved.A: product type: normal temperature water pump; Model: IS250-200-450; Design point flow: 400m3/h; B: product type: low temperature water pump; Model: 100D-16 × 8; Design point flow: 70m3/h.
Refrigerator 4: model: WCFX33RN; Refrigerating capacity is 61 × 10
4kcal/h.This refrigerator 4, as stand-by heat, is enabled when summer high temperature.As in a whole set of empty point of starting stage of driving, enable refrigerator 4 and air themperature can be made to lower as early as possible, shorten start-up time.
Invention increases water pump 3 and refrigerator 4 load, equally with certain 45000m
3/ h air compression station is example, and refrigerator 4 and water pump 3 increase about 200KW, year power consumption about 1,800,000 degree, by 0.67 yuan/kwh, operating cost only needs 1,200,000 yuan, and adopts absorption type cooling driers group process operation expense up to 5,200,000 yuan, significantly energy-saving and cost-reducing, this considerable benefit falls.
Claims (3)
1. compressed air concentrates spraying cooling drying system, comprise the epimere shower nozzle in air cooling compressor and air cooling compressor and hypomere shower nozzle, the top outlet of described air cooling compressor connects end recuperator entrance, end recuperator is connected with the outlet of air compressor machine and connects air cooling compressor lower inlet by the first valve, another outlet of end recuperator connects compressed air pipe network, in air cooling compressor, lower end is provided with screen pack, the outlet of its lower end connects water-cooling tower by level control valve, water-cooling tower connects water pump by the second valve, water pump connects the entrance of hypomere shower nozzle and refrigerator respectively by the 3rd valve, the outlet of refrigerator connects the entrance of epimere shower nozzle, it is characterized in that, described end recuperator heated compressed air enters pipe network after 30 DEG C ~ 38 DEG C.
2. compressed air according to claim 1 concentrates spraying cooling drying system, it is characterized in that, the temperature of the entrance cooling water of described epimere shower nozzle is 8 DEG C ~ 20 DEG C.
3. compressed air according to claim 1 concentrates spraying cooling drying system, it is characterized in that, the temperature of the entrance cooling water of described hypomere shower nozzle is 25 DEG C ~ 32 DEG C.
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| CN105570679A (en) * | 2015-12-18 | 2016-05-11 | 中磁科技股份有限公司 | Automatic spraying and cooling device for nitrogen storage tank |
| CN106178708A (en) * | 2016-07-13 | 2016-12-07 | 浙江智海化工设备工程有限公司 | A kind of novel large air compression station flow process |
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| US4864830A (en) * | 1988-06-13 | 1989-09-12 | Ahlstromforetagen Svenska Ab | Air conditioning process and apparatus |
| CN104174261A (en) * | 2014-08-19 | 2014-12-03 | 东南大学 | Compressed air drying device based on vortex tube refrigeration technology and working method of compressed air drying device |
| CN204320055U (en) * | 2014-12-16 | 2015-05-13 | 新余钢铁集团有限公司 | Compressed air concentrates spraying cooling drying system |
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