CN202558685U - Supercritical water oxidizing reaction system utilizing auxiliary fuel to supply heat - Google Patents
Supercritical water oxidizing reaction system utilizing auxiliary fuel to supply heat Download PDFInfo
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- CN202558685U CN202558685U CN2012200545813U CN201220054581U CN202558685U CN 202558685 U CN202558685 U CN 202558685U CN 2012200545813 U CN2012200545813 U CN 2012200545813U CN 201220054581 U CN201220054581 U CN 201220054581U CN 202558685 U CN202558685 U CN 202558685U
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Abstract
The utility model discloses a supercritical water oxidizing reaction system utilizing auxiliary fuel to supply heat. The supercritical water oxidizing reaction system comprises a reactor, a material device communicated with a material inlet on an end cover of the reactor, an oxidizing agent device communicated with an oxidizing agent inlet on the end cover of the reactor, a desalinization device communicated with a solid salt outlet at the bottom of the reactor, a fuel supplying device and a cooling water device. Energy is supplied to the supercritical water oxidizing reaction system through the auxiliary fuel, so that high equipment investment and operating cost are lowered, wherein the high equipment investment and the operating cost are caused by installation of an electric heater. By means of one-way heat recycling and on the condition that effective recycling of the heat of the supercritical water oxidizing reaction system is guaranteed, complexity of the supercritical water oxidizing reaction system is reduced, the equipment investment is lowered, and stability of operating and working of the supercritical water oxidizing reaction system is enhanced. A reasonable desalinization scheme is proposed, solid salt and soluble salt are simultaneously removed during a reaction process, wherein the solid salt and the soluble salt are produced during the reaction process. Consequently, the supercritical water oxidizing reaction system can be widely applied to harmless treating processes of pollutants, wherein the pollutants which include organic waste water, rubbish percolate and the like are high in concentration and difficult to degrade in biochemical mode.
Description
Technical field
The utility model belongs to environment protection and chemical field, particularly utilizes supercritical water the useless organic liquids such as organic waste water/percolate of high density bio-refractory to be carried out a kind of supercritical water reaction and treatment system of innocent treatment procedure as reaction medium.
Background technology
Supercritical water (SCW) be meant temperature and pressure all be higher than its stagnation point (T=374.15 ℃, the water of special state P=22.1MPa).SCW has the character of liquid and vaporous water concurrently, and specific inductivity is similar to non-polar organic solvent, has high spread coefficient and low viscosity.Under sufficiently high pressure, organism, oxygen can dissolve each other by maximum ratio and supercritical water, thereby make inhomogeneous reaction become homogeneous reaction, have reduced the resistance of mass transfer, heat transfer greatly.And the solubleness of inorganic salts in SCW is extremely low, easily it is separated.Therefore but the characteristic of this continually varying density of SCW, low electrostatic media constant, low viscosity makes it become a kind of ideal response medium with high diffusibility, high resolution.Can utilize the variation of its temperature and pressure to control reaction environment, concerted reaction speed and chemical equilibrium, regulate selectivity of catalyst etc.
Supercritical water oxidation technology (Supercritical Water Oxidation; Be called for short SCWO): the special property of utilizing water under supercritical state, to be had; Make organism and oxygenant that oxidizing reaction take place rapidly in supercritical water and come thorough decomposing organic matter; Rapidly, fully, up hill and dale the organic constitution degree of depth is destroyed, change into harmless CO
2, H
2And H
2The micromolecular compound that O etc. are harmless.The supercritical water oxidation technology is for handling hazardous and noxious substances (like dyestuff refuse, pharmacy refuse, lubricant refuse, the transformer oil that contains PCBs, radioactivity mixed waste, polychlorobiphenyl, easy volatile acid etc.), the organic waste (mud, paper mill slip etc.) of high-concentration hardly-degradable, the military harmful toxic matter (chemical weapons that those industrial sector difficulties disappear and ruin; Rocket propellant, explosive etc.) has unique effect.
Though the supercritical water oxidation treatment technology has been obtained very much progress, occurred still having some problems that need solution about using the technological testing apparatus of supercritical water and the report of commercial apparatus, be in particular in:
1) because supercritical water reaction needs high temperature, highly compressed reaction conditions, although report that when organism quality content surpassed 2-3% in the charging, the energy of system can be realized self-heating when supercritical water oxidation was handled.But because system thermal reclaims not exclusively and efficient is not high; So when starting, all need carry out the outside heat supply to reactive system with normal operation; The supercritical water reaction apparatus overwhelming majority who is moving at present both at home and abroad relies on electrically heated that material etc. is heated, and this has just caused higher running cost.
2) at present both at home and abroad the oxygenant that adopted of the supercritical water oxidation device that moving of major part is purity oxygen or hydrogen peroxide.Higher oxidant cost in the treating processes also becomes an important deciding factor of supercritical water oxidation Technological Economy property.
3) solubleness of the salt that generates in salt that contains in the charging and the reaction process in supercritical water is extremely low, and existing domestic and international super critical water treatment system can not carry out desalting treatment to reacting fluid completely in reaction process.Salt sedimentation can cause equipment such as pipeline and the reactor drum of super critical water treatment system to stop up and corrosion, also makes that to handle back fluidic saltiness high simultaneously, is difficult to recycle.So must carry out comparatively strict control to the saltiness of waste water, so just have a strong impact on the popularity of supercritical water treatment object.
Summary of the invention
To defective or the deficiency that existing supercritical water oxidation treatment system exists, the purpose of the utility model provide a kind of can significantly reduce system complex degree and running cost, in reaction process, can remove the solid salt of generation and the New type of S CWO reactive system of solvability salt simultaneously.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of supercritical water oxidation system that utilizes auxiliary fuel supply heat; Comprise reactor drum, cover material device that material inlet is communicated with, cover the oxygenant device that oxidant inlet is communicated with, the desalting plant that is communicated with the outlet of reactor bottom solid salt with reactor end with reactor end; Said reactor bottom is provided with liquid salt outlet and reacting fluid outlet; It is characterized in that; This supercritical water oxidation system also comprises fuel resupply device and chilled water unit, and said reacting fluid outlet is successively through the 4th interchanger, the 3rd interchanger, second interchanger, first interchanger, the 5th interchanger and vapour liquid separator UNICOM; Said fuel resupply device comprises fuel reservoir, and fuel reservoir is connected with the 4th heat exchanger shell pass inlet through a petrolift; The outlet of the 4th heat exchanger shell pass is connected with the interior fuel core tube inlet of reactor drum end cap through first electric heater.
In the such scheme; Said chilled water unit comprises the high-pressure cooling water pump that is connected with the first clear water storage tank; High-pressure cooling water pump outlet one tunnel links to each other with second heat exchanger shell pass inlet; Another road is through motor-driven control valve and reactor bottom cooling water inlet UNICOM, and second heat exchanger shell pass exports the evaporation wall water inlet UNICOM with the reactor drum kettle.
Described material device comprises material storage tank and connected product pump, material pump outlet and first heat exchanger shell pass inlet UNICOM; The material inlet UNICOM that outlet of first heat exchanger shell pass and reactor end cover.
Described oxygenant device comprises air compressor machine; The outlet one tunnel of air compressor machine links to each other with the 3rd heat exchanger shell pass inlet; Another road is communicated with the cooling inlet of reactor drum end cap through motor-driven control valve, and the oxidant inlet that the outlet of the 3rd heat exchanger shell pass covers through second electric heater and reactor end is communicated with.
Described desalting plant comprises the desalination snubber, and the outlet of reactor bottom solid salt is communicated with desalination snubber upper entrance through electric switching valve; Desalination snubber bottom is the solid salt outlet, and this solid salt outlet emptying pipeline is provided with electric switching valve; Desalination snubber sidewall is provided with the water-filling inlet, and the pipeline of this water-filling inlet is provided with electric switching valve.
Said the 5th heat exchanger shell pass inlet links to each other with low pressure cooling exit of pump, and low pressure cooling pump entrance links to each other with the outlet of the second clear water storage tank; The 5th heat exchanger shell pass inlet connects a hot water storage tank.
The liquid salt outlet of said reactor bottom is communicated with the 6th heat exchanger shell pass inlet; The 6th heat exchanger shell pass export pipeline is provided with second back pressure valve; The 6th heat exchanger entrance and desalination cooling-water pump outlet UNICOM, the import of desalination cooling-water pump and the second clear water storage tank UNICOM.
The utility model is the supercritical water oxidation system to high concentrated organic wastewater/percolate; This system adopts auxiliary fuel (methyl alcohol) through fuel resupply device system to be carried out energy supply; Relatively complete electrically heated heat supply form has more economy, thereby reduces higher device fund input and the running cost of bringing because of the electric heater setting.To the characteristics of percolate, through high efficient mixed, form the high-temperature zone when making auxiliary fuel burning heat release in reactor drum internal combustion district, the temperature of this high-temperature zone can reach more than 800 ℃ usually, and this helps the removal of ammonia nitrogen in high density and COD; To the higher thermal discharge of fuel, in order to ensure safe operation, the utility model uses cooling air and water coolant that the end cap and the kettle of reactor drum are carried out temperature adjusting respectively; And desalination process carried out innovative design, and can effectively improve reactor outlet water quality, prevent salt sedimentation and corrosion to downstream line; Reactor outlet fluidic heat uses a plurality of interchanger to carry out step and reclaims, and improves effectiveness of regenerator as much as possible.Propose rational desalination scheme, in reaction process, removed the solid salt and the solvability salt that generate in the reaction process simultaneously.Make it can be widely used in the innocent treatment of pollutant processes such as organic waste water/percolate of high density bio-refractory.
The advantage of the utility model be in particular in following some:
1, in system, part water coolant (evaporation wall water branch pipeline) is carried out preheating, the water coolant after the preheating remains within the safety range to guarantee reactor drum pressure-bearing wall wall temperature as the evaporation wall water of reactor drum.Evaporation wall water can form even moisture film in the porous wall inboard simultaneously, can effectively prevent the salt sedimentation and the corrosion of inside reactor in the reaction process; Another branch line of water coolant (reactor bottom cooling water pipeline) and reactor bottom UNICOM are through regulating flow to the control of pipeline valve aperture, the accurate control of realization response device bottom temp.If the inside reactor appearance temperature is ascended to heaven, then open this pipeline and can also carry out fast cooling reactor drum.
2, adopting single backhaul backheat form that heat of reaction is carried out step reclaims; Reaction back fluid is successively through fuel preheater (the 4th interchanger), oxidant preheater (the 3rd interchanger), evaporation wall water preheater (second interchanger) and material preheater (first interchanger); Farthest satisfying the preheating demand of each process fluid, and help to reduce system complexity.If fuel and oxidizer preheat temperature can not satisfy processing condition (device start process), all the other heats can carry out supply by electric heater.When reaction back fluid has heat have more than needed, take out of through the hot water generator heat of will having more than needed, be used for producing hot water or steam, can sell the corresponding income of acquisition.
3, adopt air or oxygen as oxygenant, its consumption can satisfy material oxidation needs and reactor drum end cap cooling needs, the economy of raising system operation simultaneously.The power of oxygenant is carried and is relied on air to realize that cooling air delivery can be regulated according to reactor drum end cap temperature, has improved the stability of system operation and operation.
4, material (waste water) possibly produce coking or separate out part salt when high temperature preheating, can result in blockage and corrodes pipeline, adopts lower preheating temperature, line clogging in the time of can preventing preheating on the one hand; On the other hand, the low-temperature material fluid from reactor drum end cap inside through the time can effectively reduce reactor drum end cap temperature.
4, adopt improved desalting plant, can realize simultaneously that in the course of the work intermittent type removes solid salt, the mode that continous way removes solvability salt realizes the desalination operation.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
Fig. 1 is the system architecture synoptic diagram of the utility model, and the label among the figure is represented respectively: 1, petrolift, 2, air (air compressor machine), 3, the high-pressure cooling water pump, 4, product pump; 5, low pressure cooling-water pump, 6, the desalination cooling-water pump, 7, first interchanger, 8, second interchanger, the 9, the 3rd interchanger; 10, the 4th interchanger, the 11, the 5th interchanger, the 12, the 6th interchanger, 13, first electric heater, 14, second electric heater; 15, fuel reservoir, 16, the first clear water storage tank, 17, the material storage tank, 18, the hot water storage tank, 19, the second clear water storage tank; 20, gas-liquid separator, 21, the desalination snubber, 22, reactor drum, 23, first back pressure valve; 24, second back pressure valve, 25, running water inlet, 26, hot water outlet, 27, the product liquid outlet; 28, solid salt outlet, 29, cooling water outlet, 30, the salts solution outlet, 31, gaseous product outlet, 32, water-filling inlet.
Embodiment
As shown in Figure 1, a kind of supercritical water oxidation system that utilizes auxiliary fuel supply heat comprises reactor drum 22, material device, oxygenant device, fuel resupply device, chilled water unit and desalting plant.Reactor drum 22 bottom reacting fluid outlets are through pipeline and the 4th interchanger 10 inlet UNICOMs; The 4th heat exchanger exit is through pipeline and the 3rd interchanger 9 inlet UNICOMs; The 3rd heat exchanger exit is through the pipeline and the second heat exchanger entrance UNICOM; Second heat exchanger exit is through pipeline and first interchanger, 7 inlet UNICOMs; First heat exchanger exit is through pipeline and the 5th interchanger 11 inlet UNICOMs; The 5th heat exchanger exit is through pipeline and first back pressure valve 23 and vapour liquid separator 20 inlet UNICOMs, and the outlet of vapour liquid separator 20 is divided into gaseous product outlet 31 and product liquid outlet 27.The 5th interchanger 11 is reduced to normal temperature with high temperature carbonated drink mixed stream, and cold water is taken from second water storage tank 19, and its outlet links to each other with low pressure cooling-water pump 5 inlets through pipeline; 5 outlets of low pressure cooling-water pump link to each other with interchanger 11 shell sides inlet through pipeline, and the outlet of interchanger 11 shell sides connects hot water storage tank 18.
Fuel resupply device comprises fuel reservoir 15, and fuel reservoir is connected with petrolift 1 inlet with pipeline through valve; Petrolift 1 outlet is connected with the 4th interchanger 10 shell sides inlet through pipeline; The outlet of the 4th heat exchanger shell pass is through pipeline and first electric heater 13 and the interior fuel core pipe coupling of reactor drum 22 end caps.On fuel reservoir 15 export pipelines mass flowmeter can be set, can realize control through the frequency of controlling petrolift, to satisfy process requirements according to the execute-in-place situation to the fuel fluid flow.
The oxygenant device comprises air compressor machine 2, and the outlet of air compressor machine 2 is leaded up to pipeline and the 3rd interchanger 9 shell sides inlet and linked to each other, the cooling of another road through pipeline and motor-driven control valve and the reactor drum end cap UNICOM that enters the mouth.The outlet of the 3rd heat exchanger shell pass is through the oxidant inlet UNICOM on pipeline and second electric heater 14 and reactor drum 22 end caps.
Chilled water unit comprises the first clear water storage tank 16, and its outlet links to each other with high-pressure cooling water pump 3 inlets through pipeline; High-pressure cooling water pump 3 outlet is leaded up to pipeline and is linked to each other with second interchanger, 8 shell sides inlet, and pipeline and motor-driven control valve and reactor drum 22 bottom cooling water inlet UNICOM are passed through in another road.The evaporation wall water inlet UNICOM of outlet of second heat exchanger shell pass and reactor drum 22 kettlies.
The material device comprises material storage tank 17, and 17 outlets of material storage tank are through pipeline and product pump 4 inlet UNICOMs; Product pump 4 outlets are through pipeline and first interchanger, 7 shell sides inlet UNICOM; The outlet of first heat exchanger shell pass is through the material inlet UNICOM on pipeline and reactor drum 22 end caps.
Desalting plant comprises desalination snubber 21, and reactor drum 22 bottom solid salt outlets are through electric switching valve and pipeline and desalination snubber 21 upper entrance UNICOMs; Desalination snubber 21 bottom solid salts export 28 emptying pipelines and are provided with electric switching valve; Also be provided with electric switching valve on the pipeline of desalination snubber 21 sidewall water-fillings inlet 32.
The liquid salt outlet in reactor drum 22 bottoms is through pipeline and the 6th interchanger 12 shell sides inlet UNICOM; The 6th interchanger 12 shell sides outlet (salts solution outlet 30) pipeline is provided with second back pressure valve 24; 6 outlets of desalination cooling-water pump are through pipeline and the 6th interchanger 12 inlet UNICOMs, desalination cooling-water pump 6 import UNICOMs second water storage tank 19; 12 outlets of the 6th interchanger are cooling water outlet 29.
The system works principle
Fuel storage realizes the adjusting to fuel flow through the frequency of controlling petrolift 1 in fuel reservoir 15; Fuel fluid is increased to the about 25MPa of WP through petrolift 1 with pressure, passes through the 4th interchanger 10 again with more than temperature increase to the fuel firing point temperature, then through electric heater 13.If fuel temperature does not reach temperature is set, electric heater is opened.If fuel temperature reaches when temperature is set, electric heater is in closing condition.Fuel fluid after the heating through the fuel core pipe inspection in the reactor drum end cap to reactor drum 22.
Oxygenant (air) is compressed into system pressure after getting into air 2, and portion of air is preheated to more than the firing point temperature through interchanger 9 then, gets into electric heater 14 again.If AT does not reach temperature is set, electric heater is opened; If AT reaches when temperature is set, electric heater is in closing condition.Air after the heating gets into reactor drum through reactor drum end cap inner flow passage; Portion of air does not directly get in the reactor drum 22 through the reactor drum end cap through heating in addition; Be used for cooling reactor end cap and provide oxygen to supply material and fuel to carry out sufficient oxidizing reaction, this part air flow quantity can be controlled through the variable valve on the pipeline.
Water coolant is stored in the clear water storage tank 16, is forced into system pressure through high-pressure cooling water pump 3.Part water coolant is heated to more than about supercritical temperature through interchanger 8, from reactor drum pressure-bearing wall and porous wall annular space, gets into reactor drum as evaporation wall water then, and at the even moisture film of the inboard formation of porous wall; Another part water coolant directly gets into reactor drum 22 bottoms, and reactor bottom salt discharge district temperature is regulated and control.
Organic waste water/percolate is stored in the material storage tank 17; Through product pump 4 it is promoted to WP; Get into again in the interchanger 7 preheating temperature to relatively lower temp; Get in the reactor drum through the material runner in the reactor drum end cap then, relatively low temperature can be in order to cooling combustion district wall temperature.
The high temperature fluid of reactor outlet carries out heat exchange step by step through placed in-line interchanger 10, interchanger 9, interchanger 8, interchanger 7 successively and reclaims heat.Interchanger 11 is used for this high temperature carbonated drink mixed stream is reduced to normal temperature, and cold water is taken from clear water storage tank 19, and its flow is regulated by low pressure cooling-water pump 5 according to high temperature fluid temperature and flow, and the heat of taking out of is used for producing hot water, sells to obtain relevant benefit.Cooled fluid is depressurized to normal pressure through back pressure valve 23, through gas-liquid separator 20 steam water interface is separated then.
The supersalinity fluid is reduced to normal temperature through interchanger 12 after reactor bottom flows out, water coolant is taken from clear water storage tank 19, and power is provided by desalination cooling-water pump 6, and the supersalinity fluid after the cooling discharges after reducing to normal pressure through back pressure valve 30; The insoluble solid salt that generates in the reaction process is deposited on reactor bottom, at first closes the stopping valve of desalination snubber 21 upstream and downstream pipelines before the desalination, with the desalination cooling-water pump desalination snubber 21 is carried out water-filling, and filled water amount is its volumetrical 80～90%.Open the upstream line stopping valve during desalination buffering, solid salt relies on gravity and differential pressure action to get in the desalination snubber 21.Close the upstream line stopping valve during salt discharge, slowly open the downstream line stopping valve, discharge saline mixture.The salt discharge operation can be accomplished by operator according to kind of waste water, composition and operational circumstances voluntarily.
Claims (7)
1. supercritical water oxidation system that utilizes auxiliary fuel supply heat; Comprise reactor drum, cover material device that material inlet is communicated with, cover the oxygenant device that oxidant inlet is communicated with, the desalting plant that is communicated with the outlet of reactor bottom solid salt with reactor end with reactor end; Said reactor bottom is provided with liquid salt outlet and reacting fluid outlet; It is characterized in that; This supercritical water oxidation system also comprises fuel resupply device and chilled water unit; Said reacting fluid outlet is successively through the 4th interchanger, the 3rd interchanger, second interchanger, first interchanger, the 5th interchanger and a vapour liquid separator UNICOM, and said fuel resupply device comprises fuel reservoir, and fuel reservoir is connected with the 4th heat exchanger shell pass inlet through a petrolift; The outlet of the 4th heat exchanger shell pass is connected with the interior fuel core tube inlet of reactor drum end cap through first electric heater.
2. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 1; It is characterized in that; Said chilled water unit comprises the high-pressure cooling water pump that is connected with the first clear water storage tank; High-pressure cooling water pump outlet one tunnel links to each other with second heat exchanger shell pass inlet, and another road is through motor-driven control valve and reactor bottom cooling water inlet UNICOM, and the outlet of second heat exchanger shell pass is communicated with the evaporation wall water inlet of reactor drum kettle.
3. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 1 is characterized in that, described material device comprises the product pump that is connected with the material storage tank, material pump outlet and first heat exchanger shell pass inlet UNICOM; The outlet of first heat exchanger shell pass is communicated with the material inlet that reactor end covers.
4. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 1; It is characterized in that; Described oxygenant device comprises air compressor machine; The outlet one tunnel of air compressor machine links to each other with the 3rd heat exchanger shell pass inlet, and another road is communicated with the cooling inlet of reactor drum end cap through motor-driven control valve, and the oxidant inlet that the outlet of the 3rd heat exchanger shell pass covers through second electric heater and reactor end is communicated with.
5. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 1; It is characterized in that; Described desalting plant comprises the desalination snubber, and the outlet of reactor bottom solid salt is communicated with desalination snubber upper entrance through electric switching valve; Desalination snubber bottom is the solid salt outlet, and this solid salt outlet emptying pipeline is provided with electric switching valve; Desalination snubber sidewall is provided with the water-filling inlet, and the pipeline of this water-filling inlet is provided with electric switching valve.
6. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 1 is characterized in that, said the 5th heat exchanger shell pass inlet links to each other with low pressure cooling exit of pump, and low pressure cooling pump entrance links to each other with the outlet of the second clear water storage tank; The 5th heat exchanger shell pass inlet connects a hot water storage tank.
7. the supercritical water oxidation system that utilizes auxiliary fuel supply heat as claimed in claim 6 is characterized in that, the liquid salt outlet of said reactor bottom is communicated with the 6th heat exchanger shell pass inlet; The 6th heat exchanger shell pass export pipeline is provided with second back pressure valve; The 6th heat exchanger entrance and desalination cooling-water pump outlet UNICOM, the import of desalination cooling-water pump is communicated with the second clear water storage tank.
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| CN2012200545813U CN202558685U (en) | 2012-02-20 | 2012-02-20 | Supercritical water oxidizing reaction system utilizing auxiliary fuel to supply heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200545813U CN202558685U (en) | 2012-02-20 | 2012-02-20 | Supercritical water oxidizing reaction system utilizing auxiliary fuel to supply heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030427A (en) * | 2014-06-16 | 2014-09-10 | 西安交通大学 | Supercritical water oxidation treatment system for printing and dyeing wastewater and sludge |
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2012
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030427A (en) * | 2014-06-16 | 2014-09-10 | 西安交通大学 | Supercritical water oxidation treatment system for printing and dyeing wastewater and sludge |
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Granted publication date: 20121128 Termination date: 20150220 |
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