CN202371742U

CN202371742U - Steam boiler with deaerator and lithium bromide refrigerating system

Info

Publication number: CN202371742U
Application number: CN201120527217XU
Authority: CN
Inventors: 张基虎; 杨晓辉
Original assignee: YIHENG ENERGY-SAVING TECHNOLOGY JIANGSU CO LTD
Current assignee: YIHENG ENERGY-SAVING TECHNOLOGY JIANGSU CO LTD
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2012-08-08
Anticipated expiration: 2021-12-16

Abstract

The utility model relates to a steam boiler with a deaerator and a lithium bromide refrigerating system. Natural air enters a surface cooler and a defroster, is then delivered to an air preheater by a fan and finally enters the boiler. A dead steam outlet of the deaerator is connected with a steam inlet of a lithium bromide refrigerator, and a steam condensation water outlet of the lithium bromide refrigerator is connected with the inside of a demineralized water tank. A freezing water outlet of the lithium bromide refrigerator is connected with a cooler water inlet of the surface cooler and the defroster, and a cooler water outlet of the surface cooler and the defroster is connected with a freezing water inlet of the lithium bromide refrigerator. A cooling water outlet of the lithium bromide refrigerator is connected with a water feeding pipe of a cooling tower, and a water discharging pipe of the cooling tower is connected with a cooling water inlet of the lithium bromide refrigerator. The system can reduce power consumption of the fan, reduces smoke discharge heat loss, utilizes deoxidizing dead steam and improves heat efficiency.

Description

A kind of steam boiler and lithium bromide absorption chiller system with oxygen-eliminating device

Technical field

The utility model relates to a kind of therrmodynamic system, particularly a kind of steam boiler and lithium bromide absorption chiller system with oxygen-eliminating device.

Background technology

In boiler and vapour system, O ₂And CO ₂Existence meeting corroding metal and produce the oxide salt crust, and incoagulability gas and oxide salt dirt deposition worsen heat-transfer effect.Therefore, removing the oxygen and other incoagulable gas that are dissolved in the boiler replenishing water as far as possible, is protection therrmodynamic system equipment uncorroded basic skills, also is to guarantee heat power equipment safety, efficiently move requisite means.Thermal deaerator is one of common equipment; Its cardinal principle is according to Henry's law and Dalton's law, uses steam with the saturation temperature of boiler replenishing water transient heating to a deoxygenation operating pressure correspondence, and the pressure that makes steam in the oxygen-eliminating device deoxygenation head is total head; And the partial pressure of air becomes zero; The solubility of air in water also becomes zero, and air is all overflowed from moisturizing, has also removed other incoagulable gas in the time of deoxygenation.In the heat energy that steam discharged that consumes in the oxygen removal process, quite a few is discharged into atmosphere through oxygen-eliminating device exhaust steam floss hole, and the oxygen-eliminating device operating pressure is high more; The deoxygenation steam pressure is also high more; The exhaust steam discharge capacity is big more, has both caused very big thermal waste, again contaminated environment.

Natural air is made up of dry air and steam, promptly contains moisture in the natural air, and especially humidity high season, water capacity can reach 20g/Nm ³More than, than expanding surplus in the of 1600 in liquid lower volume times, so the moisture in the natural air has occupied certain volume to water under gaseous state.The relative humidity of air reaches at 100% o'clock, and airborne moisture reaches capacity, and the air themperature of this moment is called dew-point temperature, and when air themperature dropped to dew-point temperature, airborne water vapour will condense into dew.When fuel burns in boiler, need to consume a large amount of oxygen, in boiler, blow by air blast; Air blast is when sending into oxygen; The steam that also will not participate in burning is sent into boiler, and steam becomes the high-temperature flue gas discharging after absorbing heat, has wasted a large amount of heat energy; In addition, because the existence of steam, air blast need be sent into more air to satisfy the needs of burning, has both increased power consumption, has increased heat loss due to exhaust gas again.

According to the second law of thermodynamics, heat can not spontaneously be transferred to high temp objects from cryogenic object, realize this process, must consume certain merit, just can make the temperature of cryogenic object lower, reaches the purpose of refrigeration.Lithium-bromide absorption-type refrigerating machine be a kind of be the refrigeration machine of power with the thermal source, mainly form by generator, condenser, evaporimeter, absorber four major parts and equipment such as heat exchanger and solution pump.Lithium bromide refrigerator inside is vacuum environment; For example the shell side of evaporimeter maintenance absolute pressure is 6.54mmHg; Water is 5 ℃ of boilings, and the water as refrigerant spirt is gone will explosive evaporation, when the tube side of the higher chilled water of temperature (for example the being 12 ℃) evaporimeter of flowing through; The water as refrigerant that sprays so outside copper pipe will and evaporate from copper pipe absorption heat, and the chilled water temperature in the copper pipe has just reduced (12 ℃ → 7 ℃); After the water as refrigerant evaporation; The pressure of evaporimeter will raise, and in order to keep the pressure very low (6.54mmHg) in the evaporimeter, absorber absorbs water vapour through the spray bromize lithium concentrated solution; Lithium-bromide solution behind the absorption water vapour becomes weak solution, and concentration reduces can not absorb steam again; Through generator weak solution is concentrated, it is thermal source that generator adopts steam usually, and weak solution is heated again, make the water evaporates in the weak solution after solution concentrated, keep absorbability; The isolated steam of generator is cooled off by cooling water in condenser indirectly, and the water as refrigerant of liquefy gets into the evaporimeter spray again, so moves in endless cycles.Therefore the external pipeline of lithium bromide refrigerator has chilled water import, chilled water outlet; Cooling water inlet, coolant outlet; Steam inlet, steam condensate (SC) outlet.

The utility model content

The purpose of the utility model is; Overcome the problem that exists in the prior art, a kind of steam boiler and lithium bromide absorption chiller system with oxygen-eliminating device is provided, can improve the efficiency of oxygen supply of air blast; Reduce power consumption; Reduce heat loss due to exhaust gas, the exhaust steam to oxygen-eliminating device simultaneously utilizes, and improves the thermal efficiency of whole system.

For solving above technical problem; A kind of steam boiler and lithium bromide absorption chiller system that the utility model provided with oxygen-eliminating device; Comprise boiler, air blast, sweet-water tank, small pump, oxygen-eliminating device, feed pump, air preheater, lithium bromide refrigerator and cooling tower, small pump is sent to the water inlet of oxygen-eliminating device with the demineralized water in the sweet-water tank, and the water outlet of oxygen-eliminating device is delivered to boiler through feed pump; Also comprise surface-cooler and demister; Natural air gets into surface-cooler and demister, sends into air preheater by air blast again, and the outlet of air preheater inserts the air inlet duct of boiler; The exhaust steam outlet of said oxygen-eliminating device is connected with the steam inlet of said lithium bromide refrigerator, and the steam condensate (SC) outlet of said lithium bromide refrigerator inserts said sweet-water tank; The chilled water outlet of said lithium bromide refrigerator is connected with the cooler water inlet of said surface-cooler and demister, and the cooler delivery port of said surface-cooler and demister is connected with the chilled water import of said lithium bromide refrigerator.

With respect to prior art; The utility model has been obtained following beneficial effect: (1) utilizes the exhaust steam of oxygen-eliminating device discharging to drive lithium bromide refrigerator and produces chilled water; Effectively utilized the waste heat of exhaust steam; The steam condensate (SC) that comes out from lithium bromide refrigerator inserts sweet-water tank, has both reclaimed demineralized water itself, has utilized the temperature of the waste heat raising demineralized water of steam condensate (SC) again.(2) surface-cooler and demister are united two into one by surface-cooler, demister and form; Cryogenic freezing water gets into surface-cooler; Carry out indirect heat exchange with the air of the surface-cooler of flowing through, the temperature of air is cooled to below the dew-point temperature, airborne steam condenses into the globule; And flowing into automatic rhone along the surface cooler wall, the remaining water smoke of air quenched generation is then caught by demister and is got into automatic rhone; The cooled dry air that dehumidifies gets into the inlet scoop of air blast, is sent to air preheater by air blast, and cooled drying-air temperature reduces, and density increases, and blower efficiency improves, and the unit air volume power consumption reduces.(3) air is through after drying, and moisture descends significantly, and oxygen content increases, and has reduced air output, has also reduced the power consumption of air blast.(4) steam is not only participated in burning, and also will absorb heat becomes the high-temperature flue gas discharging, and air is through after drying, and the water vapour amount that after the boiler heating, is discharged in the atmosphere descends, and heat loss due to exhaust gas descends significantly.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation, accompanying drawing only provides reference and explanation usefulness, and is non-in order to restriction the utility model.

Fig. 1 is the steam boiler of the utility model band oxygen-eliminating device and the sketch map of lithium bromide absorption chiller system.

Among the figure: 1 natural air; 2 air cleaners; 3 surface-coolers and demister; 3a cooler water inlet; 3b cooler delivery port; The automatic rhone of 3c; 4 air blasts; 6 air preheaters; The 6a inlet of cold air; 6a ' hot air outlet; The 6b smoke inlet; 6b ' exhanst gas outlet; 7 boilers; 8 air-introduced machines; 9 chimneys; 10 lithium bromide refrigerators; The import of 10a chilled water; 10a ' chilled water outlet; The 10b cooling water inlet; 10b ' coolant outlet; The 10c steam inlet; The outlet of 10c ' steam condensate (SC); 11 cooling towers; 11a cooling tower upper hose; 11a ' cooling tower outlet pipe; 12 sweet-water tanks; 13 small pumps; 14 oxygen-eliminating devices; 14a exhaust steam outlet; The outlet of 14b deaerated water; 15 feed pumps.

The specific embodiment

As shown in Figure 1, a kind of steam boiler and lithium bromide absorption chiller system with oxygen-eliminating device of the utility model comprises air cleaner 2, surface-cooler and demister 3, air blast 4, air preheater 6, boiler 7, air-introduced machine 8, lithium bromide refrigerator 10, cooling tower 11, sweet-water tank 12, small pump 13, oxygen-eliminating device 14, feed pump 15.

Natural air 1 gets into the inlet of surface-cooler and demister 3 after air cleaner 2 filters; The outlet of surface-cooler and demister 3 inserts the inlet scoop of air blast 4; The air outlet of air blast 4 inserts the inlet of cold air 6a of air preheater 6, and the hot air outlet 6a ' of air preheater 6 inserts the air inlet duct of boiler 7.

Small pump 13 is sent to the demineralized water in the sweet-water tank 12 water inlet of oxygen-eliminating device 14; The water outlet of oxygen-eliminating device 14 is delivered to boiler 7 through feed pump 15; The exhaust steam outlet 14a of oxygen-eliminating device is connected with the steam inlet 10c of lithium bromide refrigerator 10, and the steam condensate (SC) outlet 10c ' of lithium bromide refrigerator inserts sweet-water tank 12.The chilled water outlet 10a ' of lithium bromide refrigerator 10 is connected with the cooler water inlet 3a of surface-cooler and demister 3, and the cooler delivery port 3b of surface-cooler and demister 3 is connected with the chilled water import 10a of lithium bromide refrigerator.The coolant outlet 10b ' of lithium bromide refrigerator is connected with the cooling tower upper hose 11a of cooling tower 11, and the cooling tower outlet pipe 11a ' of cooling tower 11 is connected with the cooling water inlet 10b of lithium bromide refrigerator.

In the work; Natural air 1 gets into surface-cooler and demister 3 after air cleaner 2 filters; Surface-cooler and demister 3 are united two into one by surface-cooler, demister and form, and cryogenic freezing water gets into surface-cooler, carry out indirect heat exchange with the air of the surface-cooler of flowing through; The temperature of air is cooled to below the dew-point temperature; Airborne steam condenses into the globule, and flows into automatic rhone 3c along the surface cooler wall, and the remaining water smoke of air quenched generation is then caught by demister and also got into automatic rhone 3c; Dry air after the dehydration gets into the inlet scoop of air blast 4; Be sent to air preheater 6 by air blast 4; In air preheater 6; Utilize the high-temperature flue gas and the dry air of boiler 7 dischargings to carry out indirect heat exchange, make dry air become hot-air and get into the boiler air inlet duct, flue gas is delivered to chimney 9 dischargings by air-introduced machine 8.

The exhaust steam of oxygen-eliminating device 14 discharging inserts the steam inlet 10c of lithium bromide refrigerator 10, becomes steam condensate (SC) after the heat release and exports 10c ' from steam condensate (SC) and discharge and flow back to sweet-water tank 12.The cryogenic freezing water (for example being 7 ℃) that flows out from the chilled water outlet 10a ' of lithium bromide refrigerator 10; Get into the cooler water inlet 3a of surface-cooler and demister 3; In surface-cooler and demister 3, become the chilled water (for example being 12 ℃) of high temperature behind the heat of absorption air; Flow out and get back to the chilled water import 10a of lithium bromide refrigerator again from cooler delivery port 3b, accomplish the chilled water circulation.The heat that heat that the steam condensation is discharged and chilled water cooling are discharged is taken away by cooling water; The high-temperature cooling water (for example being 38 ℃) that comes out from the coolant outlet 10b ' of lithium bromide refrigerator gets into cooling tower 11 by cooling tower upper hose 11a and cools off and become low-temperature cooling water (for example being 32 ℃); Flow out into the cooling water inlet 10b of lithium bromide refrigerator then from cooling tower outlet pipe 11a ', accomplish the cooling water circulation.

The above is merely the preferable possible embodiments of the utility model, non-so the limitation the utility model scope of patent protection.Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. steam boiler and lithium bromide absorption chiller system with an oxygen-eliminating device; Comprise boiler, air blast, sweet-water tank, small pump, oxygen-eliminating device, feed pump, air preheater, lithium bromide refrigerator and cooling tower; Small pump is sent to the demineralized water in the sweet-water tank water inlet of oxygen-eliminating device; The water outlet of oxygen-eliminating device is delivered to boiler through feed pump, it is characterized in that: also comprise surface-cooler and demister, natural air gets into surface-cooler and demister; Send into air preheater by air blast again, the outlet of air preheater inserts the air inlet duct of boiler; The exhaust steam outlet of said oxygen-eliminating device is connected with the steam inlet of said lithium bromide refrigerator, and the steam condensate (SC) outlet of said lithium bromide refrigerator inserts said sweet-water tank; The chilled water outlet of said lithium bromide refrigerator is connected with the cooler water inlet of said surface-cooler and demister, and the cooler delivery port of said surface-cooler and demister is connected with the chilled water import of said lithium bromide refrigerator.