CN100411714C - Process and apparatus for producing steam from sulfur reduction and carbon extraction waste heat by flue gas density method - Google Patents
Process and apparatus for producing steam from sulfur reduction and carbon extraction waste heat by flue gas density method Download PDFInfo
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- CN100411714C CN100411714C CNB031036945A CN03103694A CN100411714C CN 100411714 C CN100411714 C CN 100411714C CN B031036945 A CNB031036945 A CN B031036945A CN 03103694 A CN03103694 A CN 03103694A CN 100411714 C CN100411714 C CN 100411714C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention relates to a method and a device for producing steam from sulfur reduction and carbon extraction waste heat by a flue gas density method, which is composed of a flue, an expansion cavity, a draught fan, a chimney, a heater, a pump, a gas extraction device, a water tank, etc. The method and the device realize the purification of flue gas via a chemical method and realize the dewatering of the flue gas and the separation extraction of various gases via the heat release condensation of water vapor (H2O with the molecular weight of 18) in the flue gas and different characteristics of different gas density. The device is sequentially connected with a cavity of a built-in heat pipe heat exchanger, the expansion cavity, a cavity of a flue gas heating heat pipe heat exchanger, a flue, a chimney, etc. The bottom of the expansion cavity is provided with an ash removal water pipe washing device, a water collecting tank is connected with a sedimentation tank, the flue gas enters the expansion cavity via the connected cavity of the heat pipe heat exchanger, and then the flue gas is exhausted from a top opening of the expansion cavity. A flue gas heater is arranged in the expansion cavity and is connected with an upper evaporator, and a gas extraction device is arranged in a gas collecting tank of the expansion cavity. The entire device has the characteristics of good corrosion resistance, good thermal insulation performance and good sealing performance.
Description
Technical field
The present invention relates to separation and Extraction sulfur dioxide in flue gas (SO
2, molecular weight 64) etc. gas, utilize flue gas to handle and add hot water, the system that produces steam.
Background technology
Power industry is to cause SO
2The main industries of pollution and acid rain, SO
2A large amount of dischargings cause the air pollution of Chinese city very serious.SO
2Discharging has caused serious acid rain to pollute and ecological damage, thereby its ambient influnence has received very big concern.The portion report of the World Bank " clear water blue sky--look forward to the Chinese environmental of 21 century " estimated that Chinese atmosphere pollution and water pollute the influence to environment.According to the estimation of willingness to pay value method, China's loss of (1995) big G﹠W pollution at present accounts for 8% of GDP; If adopt the human capital technique of estimation, its loss is equivalent to 3.5% of GDP.Along with SO
2The increase of discharge capacity, the loss cost that is caused increases sharply.According to relevant research, nineteen ninety-five, China was because acid rain and SO
2It is more than 1,100 hundred million yuan that pollution causes the economic loss of aspects such as crops, forest and health, and 2.0% of approaching gross national product then becomes the key factor that restricts China's economy and social development.Therefore, to SO
2The control of discharging is imperative.
Because to being discharged into the sulfur dioxide (SO in the atmosphere
2, molecular weight 64), environmental monitoring is constantly strengthened, think is removed these gases from flue gas, the work of developing more effective and more economical device is continuing always.Particularly in coal-fired power plant, applied many restrictions, these restrictions always require to improve in the flue gas to remove sulfur dioxide (SO
2, molecular weight 64) usefulness.
SO 2 from fume (SO
2, molecular weight 64) system of removing generally is divided into (a) dry washing system and (b) wet scrubbing system, in the dry washing system, the solution of reagent or slurries are sprayed in hot flue gas, and its moisture is evaporated, and collect the quite dried byproduct that helps handling then; In the wet scrubbing system, make reagent for example the solution or the slurries of base reagent or alkaline earth reagent contact with gas, collect and handle wet mud then.
The dry washing system generally is divided into two classes again.One class is dry-type jetting device or vertical reactor, and adsorbent is sprayed and containing sulfur dioxide (SO in this device
2, molecular weight 64) flue gas stream in, before contact, selectively remove flying dust.Another kind of is the dry sorbent injection method, wherein, is ejected in the horizontal feed pipeline that passes gas at the adsorbent that may contain catalyst, removes solid reactant of doing in the gas and excessive adsorbent before the atmosphere in discharging then.The dry system of vertical reactor type mainly is suitable for use in sulfur dioxide (SO
2, molecular weight 64) gas that content is low, can obtain higher sulfur dioxide (SO
2, molecular weight 64) remove percentage, and, generally from gas, remove sulfur dioxide (SO with the dry system of dry sorbent injection type
2, molecular weight 64) percentage lower.Therefore, present known flue gas desulfurization technique all is chemical methods, and expense is all higher, and intractability is all bigger, and for the resource of flue gas, reducing secondary pollution all has certain degree of difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of with the sulfur dioxide (SO in the boiler smoke
2, molecular weight 64), carbon dioxide (CO
2, 44), water vapour (H
2O, molecular weight 18) and the apparatus and method of used heat resource, these apparatus and method are to utilize chemical method to realize the purification of flue gas, utilize the different characteristics of all gases density in the flue gas, realize the separation and Extraction of all gases with the physics method, make the method for its resource.
The technical solution adopted for the present invention to solve the technical problems is: the system that carbon used heat is produced steam is put forward in the desulfurization of a kind of smoke density method, is connected to form by devices such as flue, dilatation cavity, air-introduced machine, chimney, heater, water pump, gas extraction device, ponds.The method that carbon used heat production steam is carried in the desulfurization of a kind of smoke density method is to utilize chemical method to realize the purification of flue gas, utilizes water vapour (H in the flue gas
2O, molecular weight 18) the heat release condensation, and the different characteristics of all gases density, realize fume-dehydrating and all gases separation and Extraction with the physics method, make its resource; This device is the cavity that connects built-in heat exchange of heat pipe on the boiler flue behind the deduster, and heat exchange of heat pipe has deashing device; The cavity outlet of heat exchange of heat pipe connects another dilatation cavity, and the dilatation cavity has enough sectional areas and volume; The dilatation cavity bottom has deashing flushing water distributor device, and the dilatation cavity bottom has catchment tray, and catchment tray is connected with sedimentation basin; Flue gas enters the dilatation cavity front portion that is attached thereto from the heat exchange of heat pipe cavity, discharges from the open top of dilatation cavity; In the dilatation cavity flue gas heater is installed, the thermal siphon and the sewer pipe that the incoagulable gas tapping equipment are installed on the flue gas heater and vertically arrange, with on put evaporimeter and be connected, the evaporimeter top is connected with blow-off line, flue gas heater is connected with drainpipe, and former water feed pipe is connected with flue gas heater; Water collection device is installed after flue gas heater; Be connected with the air pressure balance pipeline between sedimentation basin top and the dilatation cavity, be connected with slush pump and dewater unit on the sedimentation basin, sedimentation basin is connected with water pump, water pump is connected with water filtering device with dilatation cavity bottom deashing device, and water filtering device is connected with flue gas heater water distribution waterworks with flue gas heater top deashing device; On catchment tray and pipeline that sedimentation basin is connected, throttling arrangement is installed is connected with inverted-loop tube one end, the other end of inverted-loop tube places pneumatic trough bottom lowest part; In the dilatation cavity pneumatic trough, the extraction gas device is installed, the waste gas that leaks that extracts gas device is discharged in the dilatation cavity by exhaust apparatus; The smoke discharge tube at dilatation cavity top is connected with air-introduced machine, heat exchange of heat pipe, and the heat sink of heat exchange of heat pipe is connected by pipeline with the heat-releasing device of heat exchange of heat pipe, and the heat exchange of heat pipe cavity is connected with flue, chimney; That package unit has is corrosion-resistant, insulation, sealing characteristics.
The present invention is the water vapour (H that utilizes in the flue gas
2O, molecular weight 18), oxygen (O
2, molecular weight 32), nitrogen (N
2, molecular weight 28), sulfur dioxide (SO
2, molecular weight 64), sulfur trioxide (SO
3, molecular weight 80) gas, nitric oxide (NO. molecular weight 30), nitrogen dioxide (NO
2, molecular weight 44) gas, hydrogen chloride (HCl, molecular weight 36.5) gas and carbon dioxide (CO
2, 44) etc. the chemical characteristic of gas by the heat exchange of flue gas cooling being made the water vapour (H in the flue gas
2O, molecular weight 18) the heat release condensation, the dewfall atomizing absorbs acidic gas in flue gas and forms acid solution, and the alkaline dust in acid solution and the flue gas produces chemical reaction, generates the hydrochlorate mixed solution, reclaims acid condensate water and dwindles flue gas volume; Utilize the different characteristics of all gases density in the flue gas, reduce the flow velocity of flue gas by dilatation, make the dust in flue gas sedimentation, the all gases natural layering, by being installed on the floating collector in each gas-bearing formation, separation and Extraction with all gases in the physics method realization flue gas with flue gas ash removal, purification, makes its resource.
Heat exchange of heat pipe is a gravity type Natural Circulation heat-pipe apparatus, and the heat-pipe apparatus heat absorbing end is following, and release end of heat is last, and the heat sink of heat exchange of heat pipe is connected by the vertical pipeline of liquid gravity flow that maybe can make with the heat-releasing device of heat exchange of heat pipe.
The dilatation cavity can be hexahedron structure, the end of the end of heat exchange of heat pipe cavity and dilatation cavity is same continuous tilt bottom surface, dilatation cavity bottom surface is the plane of extending with certain gradient from high in the end, the bottom of dilatation cavity has along gradient direction, be parallel to domatic damascene trench, the wall of cavity is anticorrosion acid resisting material and makes, and dilatation cavity bottom surface is furnished with deashing flushing water distributor device from high to low in proper order, catchment tray, pneumatic trough.Deashing device flushing water water distributor flows down along the dilatation cavity bottom from the high-end of bottom of smoke discharging cavity, imports the catchment tray of dilatation cavity bottom rear end, and catchment tray has constant slope, draws by the pipeline that places catchment tray terminal bottom, is connected with sedimentation basin; Pneumatic trough is at dilatation cavity end, and catchment tray has inverted-loop tube to connect pneumatic trough bottom and catchment tray throttling arrangement at its upstream between two grooves; The lower end of the anterior heat exchange of heat pipe cavity of flue gas at the bottom of the dilatation cavity enters, and discharges from the tail end mouth of pipe on dilatation cavity top, and promptly flue gas import and export trend is the diagonal angle layout.
Flue gas heater is a parallelepiped structure, the top delivery port of flue gas heater connects tilted tube, the mouth of pipe is connected and installed the incoagulable gas tapping equipment above the tilted tube, tilted tube connects the thermal siphon of vertically arranging, the outlet of thermal siphon upper end connects puts evaporimeter, base of evaporator is connected with sewer pipe and is connected with the bottom water inlet pipe of flue gas heater, the evaporimeter top is connected with blow-off line, flue gas heater water inlet pipe and outlet pipe are flow path layouts such as diagonal, and the top of flue gas heater is equipped with deashing device; The lateral cross section of flue gas heater is a rectangular configuration, the longitudinal cross-section is a parallelogram sturcutre, the bottom of flue gas heater is parallel consistent with the bottom of cavity, progressively postpone in the top blind flange plane of upper top and cavity, width increases gradually, form the flue gas collection chamber, flue gas heater has enough surface areas, corrosion-resistant, the top layer is an electrically insulating material, the centre is a conductor, and the endosexine is an electrically insulating material, is three-decker, the centre is a conductor, both sides are insulator, and the conductor part of flue gas heater is connected with the negative pole of dc source by insulated conductor, and the positive pole of dc source is by corrosion-resistant electrode and the aqueous solution and flue gas heater formation loop, this device can be metal and sprays by plated film, electrophoresis, metal surface electricity high-frequency heating oxidation, the metal-plated insulating materials that processes such as plasma coating are handled, or the top layer of handling through special process is an electrically insulating material, and the centre is a conductor, and the endosexine is the glass or the ceramic material of electrically insulating material.
Water collection device is installed in after the flue gas heater, water collection device can be conventional, also can be special feed-water preheating water collection device, and feed pipe connects the feed-water preheating water collection device, feed-water preheating water collection device outlet pipe is connected with flue gas heater, after the feed-water preheating water collection device conventional water collection device can be installed; The former water of adjusting through acidity connects water-cooled preheating water collection device by pipeline.
Sedimentation basin is connected with slurry pump, and slurry pump connects grey paste dehydrating device, is connected with water return pipeline between sedimentation basin and the grey paste dehydrating device, and sedimentation basin is connected with water pump, and exit of pump connects dilatation cavity bottom deashing device and water filtering device respectively.
The filtered gray water device is connected with the flue gas heater water dispensing apparatus with flue gas heater top deashing device respectively; Divide two-way to confess behind the filtered gray water, sedimentation basin one tunnel enters heater spray Cleaning for High Capacity water distribution pipe; Another road enters the former pond of water treatment by pipeline, pumps into flue gas heater behind sedimentation and filtration.
Extract gas device be installed on the dilatation cavity wall and pneumatic trough in, extracting gas device is the air-flotation type collector, be equipped with on the pipeline of collector and get the gas blower fan, be connected with gas deep processing system by pipeline, the exhaust of deep processing device is discharged to gas in the cavity device by the negative pressure ventilation blower fan, the built-in air supporting minor of air hatch is got the gas device, can arrange successively from low to high that as required the built-in air supporting minor of at least one air hatch gets the gas device.
Deashing device is installed in the top of heat exchange of heat pipe and flue gas heater, water or water vapour (H
2O, molecular weight 18) surface of flushing heat exchange of heat pipe and flue gas heater, deashing device has corrosion resistance characteristic.
Boiler smoke through behind the deduster, is introduced in the cavity of built-in heat exchange of heat pipe heat sink, water spray deashing or water vapour (H are arranged on the heat pipe heat sink heat exchanger
2O, molecular weight 18) blow and penetrate deashing device.The release end of heat of heat exchange of heat pipe is connected with smoke discharge tube road heat exchange cavity flue gas heating chamber by pipeline, and this heat exchange of heat pipe is a gravity type gravity flow EGR.Boiler smoke enters another in the underground structure or the dilatation cavity of semi-underground structure or superstructure behind the heat exchange of heat pipe cavity, the dilatation cavity is anticorrosion acid resisting material and makes.With the inclined end face that is parallel to domatic damascene trench that has of certain gradient extension, flue gas enters from the dilatation cavity bottom is high-end, discharges from dilatation cavity top tail end for from high in the end in the bottom in cavity pond, and promptly the smoke entrance trend is that the diagonal angle is arranged.Baltimore groove along the bottom flows down the flushing water water distributor from the high-end pool wall of the bottom of smoke discharging cavity, to realize dashing ash.
Cavity is built-in with flue gas heater, the feedwater of flue gas heater bottom, and the top water outlet is parallel six cube structures.Flue gas heater has enough surface areas, and is corrosion-resistant, and the top layer is an electrically insulating material, and the centre is a conductor, and the endosexine is an electrically insulating material, is three-decker, and the centre is a conductor, and both sides are insulator.The top delivery port of flue gas heater has a tilted tube, the incoagulable gas tapping equipment is installed on herein, there is thermal siphon water to be delivered on the overhead evaporimeter of certain altitude, base of evaporator is connected with down-comer and is connected with the water inlet pipe of heater, feedwater after the adjustment acidity, be placed in the flue gas heater water-cooled preheating water collection device afterwards by the pipeline input, the water of heating feeds the flue gas heater filling pipe.Conventional water collection device is installed after the water-cooled preheating water collection device.Lowest part at flue gas heater is connected with the blow-off line of controlling by valve, leans on the water supply of the pressure realization of internal system to the distillation Demineralized Water Production device in downstream.Flue gas heater water inlet pipe and outlet pipe are flow path structures such as diagonal.The top of heat exchanger is useful on the atomizing spray water-locator of flushing heat exchanging device, water distribution wave channel along gradient direction is arranged at the bottom in pond, certain distance apart from pool wall has catchment tray, catchment tray has constant slope, and the buck that compiles is drawn by the pipeline that places trench bottom, is connected with sedimentation basin, on catchment tray choke manifold wall, there is an inverted-loop tube to pick out, place the pneumatic trough lowest part in catchment tray downstream,, extract the gas of pneumatic trough bottom by the negative pressure that its flow velocity produces.The pneumatic trough bottom is mounted with the air-flotation type collector that charges into hydrogen or helium in the light tough and tensile closed container of thin-walled body, another air-flotation type collector is installed on the top of pneumatic trough, be equipped with on the pipeline of collector and get the gas blower fan, be connected with gas deep processing system by pipeline.The exhaust of deep processing device is discharged to gas in the dilatation cavity device by the negative pressure ventilation blower fan.The sedimentation basin bottom pipe is connected with slush pump, and mud is realized the separation of water, slurry by mud concentrate drying device.Mud is imported ash treatment system by conveying device, separates the clear water backflow precipitation of separating out.The water that sedimentation basin overflows enters clear water reserviors, divides two-way to confess by water pump, and the valve of leading up to control enters the grey water flushing device of cavity device bottom, and another road enters filter, filters the back and divides two-way to confess, and one the tunnel enters heater spray Cleaning for High Capacity water distribution pipe; Another road enters distilled water by pipeline and handles former pond and adjust former acidity of water.Air-pressure balancing device is connected with the dilatation cavity with the top vent of sedimentation basin by pipeline, realizes the sealing sedimentation basin is overflowed the absorption circulation of gas.The conductor part of flue gas heater is connected with the negative pole of dc source by insulated conductor, and the positive pole of dc source is connected with the bottom and the flue gas heater in pond by corrosion-resistant electrode, forms electrostatic anti-scaling dedusting circuit.End at flue gas heater is equipped with water collection device, to collect the water droplet in the flue gas.The top afterbody has flue gas discharge opening on the dilatation cavity, and flue gas is drawn wind by air-introduced machine and sent to heat exchange of heat pipe, with the flue gas heat temperature raising, discharges by flue.The longitudinal cross-section of flue gas heater is a parallelogram sturcutre, and the bottom of flue gas heater is parallel consistent with the bottom of dilatation cavity, and progressively separate on the top blind flange plane of the upper top of flue gas heater and dilatation cavity, and width progressively increases, and forms the flue gas collection chamber.
The dilatation cavity is furnished with sulfur dioxide (SO from low to high successively
2, molecular weight 64), carbon dioxide (CO
2, 44) and flue gas exhaust mouth, the flue gas of discharge blasts the heating of heat pipe flue gas heater by air-introduced machine, enters smoke stack emission.The fume emission mouth places one jiao of the upper top in pond, and the bottom air inlet in pond is put at the smoke air inlet diagonal angle, and there are enough degree of depth, enough sectional area and enough volumes in the pond, makes flue gas that lower flow velocity be arranged, and is convenient to flue gas according to the proportion AUTOMATIC ZONING.Spray thrower sprays the top of heat exchanger with water, and the catchment tray at the bottom of the pond imports the collection pipe discharging.
Through the flue gas of deduster dedusting, temperature is higher, belongs to dust, carbon dioxide (CO
2, 44), sulfur dioxide (SO
2, molecular weight 64), oxygen (O
2, molecular weight 32), nitrogen (N
2, molecular weight 28), carbon monoxide (CO, molecular weight 28), nitrogen dioxide (NO
2, molecular weight 44), water vapour (H
2O, molecular weight 18) etc. the mist of gas, gas flow velocity in flue is very fast, belong to turbulent condition, the flue gas of high temperature is introduced the flue gas flash vessel that enough degree of depth, sectional area and volume are arranged, the flow velocity of flue gas descends rapidly in flash vessel, and according to the different AUTOMATIC ZONING of density, heavy sulfur dioxide (SO
2, molecular weight 64), sulfur trioxide (SO
3, molecular weight 80), nitrogen dioxide (NO
2, molecular weight 44) etc. gas be sunken to the bottom in pond, and lighter nitric oxide (NO, molecular weight 30), hydrogen chloride (HCl, molecular weight 36.5), the nitrogen (N of proportion
2, molecular weight 28), carbon monoxide (CO, molecular weight 28), water vapour (H
2O, molecular weight 18) etc. gas float top in flue gas, carbon dioxide (CO
2, 44) place the middle level of container flue gas, because smoke air inlet places the bottom discharging of container, and the bigger dust of proportion is in the container that has reduced flow velocity, natural subsidence, also be sunken to the bottom in pond, the spray equipment on top sprays water in heat exchanger and cavity and sprays into the water smoke form, has absorbed the heat in the flue gas, and temperature raises.Water smoke absorbs the soluble gas in flue gas dissolving, and and flue gas in the dust and the acidic gas in flue gas of apparent alkalescence react the water vapour (H in the flue gas
2O, molecular weight 18) and most of heat of flue gas by placing heat exchanger in the cavity and absorb and in evaporimeter, producing water vapour by the thermal siphon self-circulation mode, water vapour as the water vapour of next stage heat exchanger, is realized multiple-effect evaporation again.Water vapour (H in the flue gas of heat release
2O, molecular weight 18) condensation, dirty along heat exchanger wall, converge with the water that sprays, because device is equipped with static good antiscale property device and makes the heat exchanger top layer induce positive charge, flue gas is under effect of electric field, and dust is adsorbed in heat exchanger surface, under current, and at the bottom of the pond slope, come together in the catchment tray, enter sedimentation basin, because flue gas flow velocity in flash vessel is slow the dust collection that reclaims in the flue gas, the volume that is cooled shrinks, and water vapour (H
2O, molecular weight 18) condensation, the flue gas volume that makes is dwindled greatly, and Pen Lin water shows acid in addition, and dust in flue gas shows alkalescence, has under the big contact area condition sulfur in smoke (SO that makes
2, molecular weight 64), sulfur trioxide (SO
3, molecular weight 80), hydrogen chloride gases such as (HCl, molecular weight 36.5) is all soluble in water, and and flue gas in the dust of alkalescence react, change salt or acid into, become the saturated solution of saturated sour gas.This water pumps into former water treatment facilities and uses as the moisturizing of flue gas heater behind sedimentation and filtration.Undissolved sulfur dioxide (SO
2, molecular weight 64), carbon dioxide (CO
2, 44), nitrogen (N
2, molecular weight 28), oxygen (O
2, molecular weight 32), carbon monoxide (CO, molecular weight 28) and water vapour (H
2O, molecular weight 18) by the different natural layerings of proportion separately, the sulfur dioxide (SO of bottom
2, molecular weight 64) be compiled in the pneumatic trough that is lower than at the bottom of the pond, be mounted with in the pneumatic trough and get tracheae, get gas tube orifice by the balloon type float with get tracheae and be connected, make and get gas tube orifice and place sulfur dioxide (SO
2, molecular weight 64) in the gas, at sulfur dioxide (SO
2, molecular weight 64) have and carbon dioxide (CO on the gas
2, 44) carbon dioxide (CO of gas density correspondence
2, 44) get tracheae, place carbon dioxide (CO
2, 44) in the gas-bearing formation, the top in the pond is equipped with the flue gas exhaust mouth, the flue gas of discharge blasts flue gas heat hot tube heater or steam heater through air-introduced machine, with the flue gas temperature raising, discharges.Sulfur dioxide (SO
2, molecular weight 64) as raw material, according to the difference of technology and conventional sulfur dioxide (SO
2, molecular weight 64) treating apparatus connects.Carbon dioxide (CO
2, 44) gas and conventional carbon dioxide (CO
2, 44) gas treatment equipment connect to utilize.Sulfur dioxide (the SO that overflows
2, molecular weight 64) and carbon dioxide (CO
2, 44) gas places the air inlet place of flue gas again by collection conduit, carries out layering again.
The invention has the beneficial effects as follows: the present invention can be very simply without any the resource of the realization flue gas of public hazards, solve the difficult problem in this puzzlement world of flue gas desulfurization, fully reclaimed simultaneously the energy in the flue gas, by evaporation to waste water such as municipal sewage, produce required recirculated water of power plant and boiler replenishing water, and collected ash can be according to the situation of different power plant or is directly discharged or calcination processing, makes it to realize not having to poison.This system utilizes the physical characteristic of flue gas, does not add any chemical analysis, utilizes the heat of self that water is evaporated, and with the oxious component resource of flue gas, the simplest method of usefulness has realized the desulfurization of flue gas, carbon dioxide (CO
2, 44) purification, the utilization again of used heat, the distillation desalination of waste water, the developing direction of cleaner production has been represented in a series of activities such as the processing again of dangerous dust, and is significant.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Among the figure: 1 boiler flue, 2 dedusters, 3 heat pipe heat exchanging cavitys, 4 heat exchanger spraying and cleaning apparatus, 5 heat pipes heat absorption heat exchanger, 6 static good antiscale property dc sources, 7 earthing or grounding means, 8 dilatation cavity bottom tube blowers, 9 acid clear water pipes, 10 deduster ash releasing tubes, 11 dilatation cavitys, 12 filters, 13 flying dust blenders, 14 grey conveying devices, 15 leaching storehouses, 16 water filters, 17, collection chamber, 18 slurry pipelines, 19 drainage return pipes, 20 acid water water inlet pipes, 21 towards grey water pipe, 22 water pumps, 23 clarification ponds, 24 earth electrodes, 25 clarification pond ash releasing tubes, 26 precipitation pond overflow pipes, 27 precipitation ponds, 28 barometric pipes, 29 flue gas heater drainpipes, 30 buck drainpipes, 31 flow controllers of bleeding, 32 catchment tray, the 33 inverted U-shaped drainpipes of bleeding, 34 sulfur dioxide (SO
2, molecular weight 64) pneumatic trough, 35 bullets contract and get tracheae, 36 sulfur dioxide air-flotation type collectors, 37 sulfur dioxide (SO
2, molecular weight 64) gas treatment equipment, 38 overflows gas exhaust blower, 39 air-introduced machines, 40 carbon dioxide (CO
2, 44) air-flotation type collector, 41 preheating water collection devices, 42 conventional water collection devices, 43 flue gas combs, 44 carbon dioxide (CO
2, 44) treating apparatus, 45 smoke induced draught fans, 46 heat pipe heat release heat exchangers, 47 heater feed pipes, 48 heaters spray dust remover, 49 flue gas heaters, 50 chimneys, 51 heat pipe tube connectors, 52 feedwater distribution reservoirs, 53 former water water inlet pipes, 54 acid water water inlet pipes, 55 acid water efferent ducts, 56 evaporimeter downpipes, 57 evaporimeters, 58 incoagulable gas soakers, 59 steam control valves, 60 steam output pipes, 61 thermal siphons
The specific embodiment
As shown in the figure: the flue gas that boiler combustion is discharged enters into heat pipe heat absorption heat exchanger 5 heat absorptions that are provided with heat exchanger spraying and cleaning apparatus 4 after by boiler flue 1, deduster 2 dedustings, reduce the temperature of flue gas, dwindle the volume of flue gas, make flue gas reduce flow velocity, dust on the water cleaning heat pipe heat absorption heat exchanger 5 that heat exchanger spraying and cleaning apparatus 4 sprays out, heat pipe is kept clean and high heat exchange efficiency, what heat exchanger spraying and cleaning apparatus 4 sprayed can be water, can be high steam.After the flue gas heat release, density increases, and sinks, and the flying dust of deposition washes through flushometer, enters in the dilatation cavity 11, and flue gas is by distribution device, according to layering in the dilatation cavity 11 that do not coexist of gas autologous density, the water vapour (H of light specific gravity
2O, molecular weight 18), nitrogen (N
2, molecular weight 28), oxygen (O
2, molecular weight 32), the nitric oxide top of gas in cavity such as (NO, molecular weight 30), carbon dioxide (CO
2, 44), hydrogen chloride (HCl, molecular weight 36.5) gas places the middle part of cavity gas, sulfur dioxide (SO
2, molecular weight 64), sulfur trioxide (SO
3, molecular weight 80), nitrogen dioxide (NO
2, molecular weight 44) etc. place the lower bottom part of cavity.Be placed in the water of heater spray dust remover 48 ejections on flue gas heater 49 tops, heat exchanger is cleaned, form the abundant heat exchange of water smoke and flue gas simultaneously, the heat content that absorbs other gas in the flue gas becomes water vapour (H
2O, molecular weight 18) rise easy to be molten hydrogen chloride (HCl, molecular weight 36.5) gas, nitric oxide (NO, molecular weight 30) gas, nitrogen dioxide (NO in the water droplet dissolving flue gas
2, molecular weight 44) gas, sulfur trioxide (SO
3, molecular weight 80) etc. gas, improve water vapour (H
2O, molecular weight 18) the dewfall point, form enough temperature difference with the water in the flue gas heater 49, condensed water is dirty along tube wall, acidic gas in flue gas is washed, and dust is by the globule and have the heat exchanger absorption that has static to be swept away to enter in the grey tank 32 by dilatation cavity bottom ash-pit tube blower 8 with water to compile.And sulfur dioxide (SO
2, molecular weight 64), carbon dioxide (CO
2, 44) and other flue gas, AUTOMATIC ZONING, difference according to weight density, resemble layering the cocktail, behind preheating water collection device 41, filtering water droplet wherein, enter into dilatation cavity 11 flue gas demixing zones, the lighter flue gas of proportion is discharged through smoke induced draught fan 45 on the top layer, and the release end of heat heating that enters into heat pipe heat release heat exchanger 46 is discharged by chimney 50.Sulfur dioxide (the SO of bottom
2, molecular weight 64) by floating sulfur dioxide (SO
2, molecular weight 64) get bullet on the gas device 36 and contract and get tracheae 35 and extract out through air-introduced machine, enter into sulfur dioxide (SO
2, molecular weight 64) in the gas treatment equipment 37, sulfur dioxide (SO
2, molecular weight 64) air-flotation type collector 36 is the density differences according to different flue gases, floats among the flue gas, its air hatch places the bottom of air-flotation type exhaust apparatus, can guarantee sulfur dioxide (SO
2, molecular weight 64) exhaust purity.Carbon dioxide (CO
2, 44) air-flotation type collector 40 also is according to than being refitted in carbon dioxide (CO
2, 44) among, carbon dioxide (CO
2, 44) air hatch of air-flotation type collector 40 playing the bottom that floating is got the gas device.Sulfur trioxide (SO
3, molecular weight 80) gas since proportion the heaviest, will come together in the foot of pneumatic trough, by the inverted U-shaped drainpipe 33 of bleeding on the flow controller 31 of bleeding of collection pipe, water that it is inner or sulfur trioxide (SO
3, molecular weight 80) gas extraction, discharge, in pumping process, sulfur dioxide (SO is arranged also
2, molecular weight 64) gas is drawn out of, this air-water mixture enters into precipitation pond 27, the alkali components of ash and the acid reaction in the water form salt in the buck, and be soluble in water, and saturated sulfur dioxide (SO
2, molecular weight 64) etc. sour gas will in sedimentation basin, overflow, be full of the top of closed container, be discharged in the dilatation cavity 11 by barometric pipe 28.
Mortar is extracted out by the slurry pump on the precipitation pond 27, arrives 15,16,17 dehydrations of Ash Water Separator device, and water overflows to clarification pond 23 through return pipe 19, and the ash of dehydration is mixed in the boiler ash discharge treating apparatus with the boiler ash discharge by grey conveying device 14.Because dioxin is water insoluble, also sinks in the ash, along with ash is imported in the ash handling equipment jointly.And enter into clarification pond 23 from the water that sedimentation basin overflows, and divide two-way to confess, the one tunnel enters filter 12, forms the water of acid characteristics, enters into acid clear water pipe 9, as spray deashing water and distribution reservoir moisturizing; Another road enters into dilatation cavity bottom ash-pit tube blower 8 by valve with towards grey water pipe 21.Sulfur dioxide (SO
2, molecular weight 64) gas and carbon dioxide (CO
2, 44) gas, treated device overflows, and extracts out by pump 38 to enter in the layering cavity, realizes the separation once more of gas, and is added in the flue gas heater 49 through the acid water of water distribution, can prevent the generation of the incrustation scale on the condenser inwall.Water vapour (the H that evaporimeter produces
2O, molecular weight 18) introduce the distillation desalter in downstream.The draining of heat exchanger enters into the water replanishing device in downstream, and discharge the final back that concentrates.
Claims (10)
1. the system that carbon used heat is produced steam is put forward in smoke density method desulfurization, connect to form by flue, dilatation cavity, air-introduced machine, chimney, heater, water pump, gas extraction device, sink arrangement, it is characterized in that: the method that carbon used heat production steam is carried in the desulfurization of a kind of smoke density method is to utilize chemical method to realize the purification of flue gas, utilizes water vapour (H in the flue gas
2O, molecular weight 18) the heat release condensation, and the different characteristics of all gases density, realize fume-dehydrating and all gases separation and Extraction with the physics method, make its resource; This device is the cavity that connects built-in heat exchange of heat pipe on the boiler flue behind the deduster, and heat exchange of heat pipe has deashing device; The cavity outlet of heat exchange of heat pipe connects another dilatation cavity, and the dilatation cavity has enough degree of depth, enough sectional area and volume; The dilatation cavity bottom has deashing flushing water distributor device, and the dilatation cavity bottom has catchment tray, and catchment tray is connected with sedimentation basin; Flue gas enters the dilatation cavity front portion that is attached thereto from the heat exchange of heat pipe cavity, discharges from the open top of dilatation cavity; In the dilatation cavity flue gas heater is installed, the thermal siphon and the sewer pipe that the incoagulable gas tapping equipment are installed on the flue gas heater and vertically arrange, thermal siphon and sewer pipe with on put evaporimeter and be connected, the evaporimeter top is connected with blow-off line, flue gas heater is connected with drainpipe, and former water feed pipe is connected with flue gas heater; Water collection device is installed after flue gas heater; On catchment tray and pipeline that sedimentation basin is connected, throttling arrangement is installed is connected with inverted-loop tube one end, the other end of inverted-loop tube places pneumatic trough bottom lowest part; Be connected with the air pressure balance pipeline between sedimentation basin top and the dilatation cavity, be connected with slush pump and dewater unit on the sedimentation basin, sedimentation basin is connected with water pump, water pump is connected with water filtering device with dilatation cavity bottom deashing device, and water filtering device is connected with flue gas heater water distribution waterworks with deashing device; In the dilatation cavity pneumatic trough, the extraction gas device is installed, the waste gas that leaks that extracts gas device is discharged in the dilatation cavity by exhaust apparatus; The smoke discharge tube at dilatation cavity top is connected with air-introduced machine, heat exchange of heat pipe, and the heat sink of heat exchange of heat pipe is connected by pipeline with the heat-releasing device of heat exchange of heat pipe, and the heat exchange of heat pipe cavity is connected with flue, chimney; That package unit has is corrosion-resistant, insulation, sealing characteristics.
2. the system that carbon used heat is produced steam is put forward in a kind of smoke density method according to claim 1 desulfurization, and it is characterized in that: system is the water vapour (H that utilizes in the flue gas
2O, molecular weight 18), oxygen (O
2, molecular weight 32), nitrogen (N
2, molecular weight 28), sulfur dioxide (SO
2, molecular weight 64), sulfur trioxide (SO
3, molecular weight 80) gas, nitric oxide (NO, molecular weight 30), nitrogen dioxide (NO
2, molecular weight 44) gas, hydrogen chloride (HCl, molecular weight 36.5) gas, carbon monoxide (CO, molecular weight 28) and carbon dioxide (CO
2, 44) chemical characteristic of gas makes water vapour (H in the flue gas by the heat exchange cooling to flue gas
2O, molecular weight 18) the heat release condensation, the dewfall atomizing absorbs acidic gas in flue gas and forms acid solution, and the alkaline dust in acid solution and the flue gas produces chemical reaction, generates the hydrochlorate mixed solution, reclaims acid condensate water; Utilize the different characteristics of all gases density in the flue gas, reduce the flow velocity of flue gas by dilatation, make the dust in flue gas sedimentation, the all gases natural layering, by being installed on the floating collector in each gas-bearing formation, separation and Extraction with all gases in the physics method realization flue gas with flue gas ash removal, purification, makes its resource.
3. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: heat exchange of heat pipe wherein is a gravity type Natural Circulation heat-pipe apparatus, the heat-pipe apparatus heat absorbing end is following, release end of heat is last, and the heat sink of heat exchange of heat pipe is connected by the vertical pipeline of liquid gravity flow that maybe can make with the heat-releasing device of heat exchange of heat pipe.
4. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: dilatation cavity wherein is a hexahedron structure, the end of the end of heat exchange of heat pipe cavity and dilatation cavity is same continuous tilt bottom surface, dilatation cavity bottom surface is the plane of extending with certain gradient from high in the end, the bottom of dilatation cavity has along gradient direction, be parallel to domatic damascene trench, the wall of cavity is anticorrosion acid resisting material and makes, dilatation cavity bottom surface is furnished with deashing flushing water distributor device from high to low in proper order, catchment tray, pneumatic trough; Deashing device flushing water water distributor flows down along the dilatation cavity bottom from the high-end of bottom of smoke discharging cavity, imports the catchment tray of dilatation cavity bottom rear end, and catchment tray has constant slope, draws by the pipeline that places catchment tray terminal bottom, is connected with sedimentation basin; Pneumatic trough is at dilatation cavity end, and catchment tray has inverted-loop tube to connect pneumatic trough bottom and catchment tray throttling arrangement at its upstream between two grooves; The lower end of the anterior heat exchange of heat pipe cavity of flue gas at the bottom of the dilatation cavity enters, and discharges from the tail end mouth of pipe on dilatation cavity top, and promptly flue gas import and export trend is the diagonal angle layout.
5. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: flue gas heater wherein is a parallelepiped structure, the top delivery port of flue gas heater connects tilted tube, there is the mouth of pipe to be connected and installed the incoagulable gas tapping equipment above the tilted tube, tilted tube connects the thermal siphon of vertically arranging, the outlet of thermal siphon upper end connects puts evaporimeter, base of evaporator is connected with sewer pipe and is connected with the bottom water inlet pipe of flue gas heater, the evaporimeter top is connected with blow-off line, flue gas heater water inlet pipe and outlet pipe are flow path layouts such as diagonal, and the top of flue gas heater is equipped with deashing device; The lateral cross section of flue gas heater is a rectangular configuration, the longitudinal cross-section is a parallelogram sturcutre, the bottom of flue gas heater is parallel consistent with the bottom of cavity, progressively postpone in the top blind flange plane of upper top and cavity, width increases gradually, form the flue gas collection chamber, flue gas heater has enough surface areas, corrosion-resistant, the top layer is an electrically insulating material, the centre is a conductor, and the endosexine is an electrically insulating material, is three-decker, the centre is a conductor, both sides are insulator, and the conductor part of flue gas heater is connected with the negative pole of dc source by insulated conductor, and the positive pole of dc source is by corrosion-resistant electrode and the aqueous solution and flue gas heater formation loop, this device sprays by plated film for metal, electrophoresis, metal surface electricity high-frequency heating oxidation, the metal coating insulating materials that the plasma coating processes is handled, or the top layer of handling through special process is an electrically insulating material, and the centre is a conductor, and the endosexine is the glass or the ceramic material of electrically insulating material.
6. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: water collection device wherein is installed in after the flue gas heater, water collection device is conventional or special feed-water preheating water collection device, feed pipe connects the feed-water preheating water collection device, feed-water preheating water collection device outlet pipe is connected with flue gas heater, and conventional water collection device is installed after the feed-water preheating water collection device; The former water of adjusting through acidity connects the feed-water preheating water collection device by pipeline.
7. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: sedimentation basin wherein is connected with slurry pump, slurry pump connects grey paste dehydrating device, be connected with water return pipeline between sedimentation basin and the grey paste dehydrating device, sedimentation basin is connected with water pump, and exit of pump connects dilatation cavity bottom deashing device and water filtering device respectively.
8. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, and it is characterized in that: filtered gray water device wherein is connected with the flue gas heater water dispensing apparatus with deashing device respectively; Divide two-way to confess behind the filtered gray water, sedimentation basin one tunnel enters the spray Cleaning for High Capacity water distribution pipe; Another road enters the former pond of water treatment by pipeline, pumps into flue gas heater behind sedimentation and filtration.
9. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, it is characterized in that: extraction gas device wherein be installed on the dilatation cavity wall and pneumatic trough in, extracting gas device is air supporting minor collector, air supporting is the balloon that charges into hydrogen or helium in the gently tough and tensile closed container of a thin-walled body, be equipped with on the pipeline of collector and get the gas blower fan, be connected with gas deep processing system by pipeline, the exhaust of deep processing device is discharged to gas in the dilatation cavity device by the blower fan of bleeding, the built-in air supporting minor of air hatch is got the gas device, arranges successively from low to high that as required the built-in air supporting minor of at least one air hatch gets the gas device.
10. the system that carbon used heat is produced steam is put forward in smoke density method according to claim 1 desulfurization, and it is characterized in that: deashing device wherein is installed in the top of heat exchange of heat pipe and flue gas heater, water or water vapour (H
2O, molecular weight 18) surface of spray irrigation heat exchange of heat pipe and flue gas heater, deashing device has corrosion resistance characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031036945A CN100411714C (en) | 2003-02-18 | 2003-02-18 | Process and apparatus for producing steam from sulfur reduction and carbon extraction waste heat by flue gas density method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031036945A CN100411714C (en) | 2003-02-18 | 2003-02-18 | Process and apparatus for producing steam from sulfur reduction and carbon extraction waste heat by flue gas density method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523269A CN1523269A (en) | 2004-08-25 |
| CN100411714C true CN100411714C (en) | 2008-08-20 |
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ID=34282077
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031036945A Expired - Fee Related CN100411714C (en) | 2003-02-18 | 2003-02-18 | Process and apparatus for producing steam from sulfur reduction and carbon extraction waste heat by flue gas density method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101569811B (en) * | 2008-05-04 | 2012-10-10 | 徐永涛 | Porous ceramic grid atomizing deposition CO2(SO2) purifying device |
| CN101342456B (en) * | 2008-08-28 | 2011-01-26 | 刘建德 | Wastewater and exhaust gas purification and treatment device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557141A (en) * | 1991-09-03 | 1993-03-09 | Ishikawajima Harima Heavy Ind Co Ltd | Flue gas desulfurization apparatus |
| CN1278455A (en) * | 2000-06-16 | 2001-01-03 | 刘同生 | Wet dedusting and liquid catalytic desulfurizing process and equipment for fume treatment in thermal power plant |
| CN2467167Y (en) * | 2000-12-29 | 2001-12-26 | 清华大学 | Seawater liquid column spray type desulfurizing device for flue gas |
-
2003
- 2003-02-18 CN CNB031036945A patent/CN100411714C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557141A (en) * | 1991-09-03 | 1993-03-09 | Ishikawajima Harima Heavy Ind Co Ltd | Flue gas desulfurization apparatus |
| CN1278455A (en) * | 2000-06-16 | 2001-01-03 | 刘同生 | Wet dedusting and liquid catalytic desulfurizing process and equipment for fume treatment in thermal power plant |
| CN2467167Y (en) * | 2000-12-29 | 2001-12-26 | 清华大学 | Seawater liquid column spray type desulfurizing device for flue gas |
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| CN1523269A (en) | 2004-08-25 |
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